Hi, I have setup Ovirt with glusterfs...I have some concern about the network part.... 1. Is there any way to restrict the Guest VM...so that it can be assign with single ip address...and in anyhow the user can not manipulate the IP address from inside the VM (that means user can not change the ip address inside the VM). Thanks, Punit
On Thu, Jun 19, 2014 at 04:23:18PM +0800, Punit Dambiwal wrote:
Hi,
I have setup Ovirt with glusterfs...I have some concern about the network part....
1. Is there any way to restrict the Guest VM...so that it can be assign with single ip address...and in anyhow the user can not manipulate the IP address from inside the VM (that means user can not change the ip address inside the VM).
I am afraid that oVirt does not let you do that out-of-the-box. By default, the vdsm-no-mac-spoofing filter is applied to vNICs, which indeed allows IP spoofing. This behavior can be changed by writing a vdsm hook that changes the default filterref to <filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref> If your VM is assigned with its address not via dhcp, life is more complicated, since the hook needs to have access to this address before boot. I would love to assist you in writing such a hook; please take the vmfex_dev hook as a reference. To read more about vdsm hooks, please see http://www.ovirt.org/Vdsm_Hooks . Regards, Dan.
On Thu, Jun 19, 2014 at 12:34:51PM +0100, Dan Kenigsberg wrote:
On Thu, Jun 19, 2014 at 04:23:18PM +0800, Punit Dambiwal wrote:
Hi,
I have setup Ovirt with glusterfs...I have some concern about the network part....
1. Is there any way to restrict the Guest VM...so that it can be assign with single ip address...and in anyhow the user can not manipulate the IP address from inside the VM (that means user can not change the ip address inside the VM).
I am afraid that oVirt does not let you do that out-of-the-box. By default, the vdsm-no-mac-spoofing filter is applied to vNICs, which indeed allows IP spoofing.
This behavior can be changed by writing a vdsm hook that changes the default filterref to
<filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref>
If your VM is assigned with its address not via dhcp, life is more complicated, since the hook needs to have access to this address before boot.
I would love to assist you in writing such a hook; please take the vmfex_dev hook as a reference. To read more about vdsm hooks, please see http://www.ovirt.org/Vdsm_Hooks .
I've posted a hook like that to http://gerrit.ovirt.org/#/c/29093/1 Maybe you can try it out, by placing http://gerrit.ovirt.org/#/c/29093/1/vdsm_hooks/noipspoof/noipspoof.py on your /usr/libexec/vdsm/hooks/before_device_create on each of your hosts, and setting a custom property named "noipspoof" to a list of valid IP addresses. Please report if it does what it should. It would obviously be nicer if we integrate this with cloud-init, so that each VM would have its list of valid addresses defined once. Care to open an RFE? Regards, Dan.
Hi Den, Thanks for the updates...but still the user can spoof the another ip address by manually edit the ifcfg-eth0:0 file.... Like if i assign the 10.0.0.5 ip address to one VM through cloud-int...once the VM bootup user can login to VM and create another virtual ethernet device and add another ip address 10.0.0.6 to this VM.... I want in anyhow the user can not spoof the ip address....either they can edit but the new ip address can not boot up(should not active)... Thanks, Punit On Tue, Jun 24, 2014 at 4:44 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Thu, Jun 19, 2014 at 12:34:51PM +0100, Dan Kenigsberg wrote:
On Thu, Jun 19, 2014 at 04:23:18PM +0800, Punit Dambiwal wrote:
Hi,
I have setup Ovirt with glusterfs...I have some concern about the network part....
1. Is there any way to restrict the Guest VM...so that it can be assign with single ip address...and in anyhow the user can not manipulate the IP address from inside the VM (that means user can not change the ip address inside the VM).
I am afraid that oVirt does not let you do that out-of-the-box. By default, the vdsm-no-mac-spoofing filter is applied to vNICs, which indeed allows IP spoofing.
This behavior can be changed by writing a vdsm hook that changes the default filterref to
<filterref filter='clean-traffic'> <parameter name='CTRL_IP_LEARNING' value='dhcp'/> </filterref>
If your VM is assigned with its address not via dhcp, life is more complicated, since the hook needs to have access to this address before boot.
I would love to assist you in writing such a hook; please take the vmfex_dev hook as a reference. To read more about vdsm hooks, please see http://www.ovirt.org/Vdsm_Hooks .
I've posted a hook like that to http://gerrit.ovirt.org/#/c/29093/1 Maybe you can try it out, by placing http://gerrit.ovirt.org/#/c/29093/1/vdsm_hooks/noipspoof/noipspoof.py on your /usr/libexec/vdsm/hooks/before_device_create on each of your hosts, and setting a custom property named "noipspoof" to a list of valid IP addresses.
Please report if it does what it should.
It would obviously be nicer if we integrate this with cloud-init, so that each VM would have its list of valid addresses defined once. Care to open an RFE?
Regards, Dan.
Am 24.06.2014 11:52, schrieb Punit Dambiwal:
Hi Den,
Thanks for the updates...but still the user can spoof the another ip address by manually edit the ifcfg-eth0:0 file....
Like if i assign the 10.0.0.5 ip address to one VM through cloud-int...once the VM bootup user can login to VM and create another virtual ethernet device and add another ip address 10.0.0.6 to this VM....
I want in anyhow the user can not spoof the ip address....either they can edit but the new ip address can not boot up(should not active)...
Thanks, Punit
Imho you can't force the vm to not spin it's inside network interface up with a certain IP. What you _can_ (and should) prevent is to allow packets from this spoofed ip to access your network. this is, what the filter no-ip-spoofing does, see the docs here: http://libvirt.org/formatnwfilter.html#nwfexamples it prevents sending spoofed packages from inside the vm by not allowing them on the virtual integrated libvirt switch on your host (which runs the vm). this might look a little different, depending on your network setup (bonding, bridges, vlans). HTH -- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
On Tue, Jun 24, 2014 at 05:52:51PM +0800, Punit Dambiwal wrote:
Hi Den,
Thanks for the updates...but still the user can spoof the another ip address by manually edit the ifcfg-eth0:0 file....
Like if i assign the 10.0.0.5 ip address to one VM through cloud-int...once the VM bootup user can login to VM and create another virtual ethernet device and add another ip address 10.0.0.6 to this VM....
I want in anyhow the user can not spoof the ip address....either they can edit but the new ip address can not boot up(should not active)...
Thanks, Punit
Have you placed my script properly? Could you share your domxml as visible to libvirt? virsh -r dumxml <name-of-your-vm> And as alluded by Sven - could you try to use the spooded IP address? Configuring is not blocked by the filter, only using it (try pinging outside of the VM). Regrads, Dan.
Hi Dan, I try the following way :- 1. I placed your script in the following location :- /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof & /usr/libexec/vdsm/hooks/before_nic_hotplug/50_noipspoof 2. Then run this command on the ovirt-engine server (engine-config -s "UserDefinedVMProperties=noipspoof=^[0-9.]*$") 3. After that stop the VM and set a custom property named "noipspoof" with ip 10.10.10.6. 4. Run the VM and login via ssh,configure another ethernet with eth0:0 with the ip address 10.10.10.9 5. From another VM with ip 10.10.10.5 i can able to ping 10.10.10.9.... One strange thing is in VM xml still the filter is "vdsm-no-mac-spoofing" instead of "noipspoof" ---------------- <interface type='bridge'> <mac address='00:1a:4a:81:80:09'/> <source bridge='private'/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='up'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/ > ---------------- Please let me know if i am wrong here.... [image: Inline image 1] On Tue, Jun 24, 2014 at 8:06 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Tue, Jun 24, 2014 at 05:52:51PM +0800, Punit Dambiwal wrote:
Hi Den,
Thanks for the updates...but still the user can spoof the another ip address by manually edit the ifcfg-eth0:0 file....
Like if i assign the 10.0.0.5 ip address to one VM through cloud-int...once the VM bootup user can login to VM and create another virtual ethernet device and add another ip address 10.0.0.6 to this VM....
I want in anyhow the user can not spoof the ip address....either they can edit but the new ip address can not boot up(should not active)...
Thanks, Punit
Have you placed my script properly? Could you share your domxml as visible to libvirt?
virsh -r dumxml <name-of-your-vm>
And as alluded by Sven - could you try to use the spooded IP address? Configuring is not blocked by the filter, only using it (try pinging outside of the VM).
Regrads, Dan.
Here's a workaround: define one logical network per vm assign IPs to these networks from a central instance assign one broadcast domain per logical network. so in other words: do correct subnetting. if you got a router who can't get spoofed you should be fine. HTH Am 25.06.2014 04:16, schrieb Punit Dambiwal:
Hi Dan,
I try the following way :-
1. I placed your script in the following location :- /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof & /usr/libexec/vdsm/hooks/before_nic_hotplug/50_noipspoof
2. Then run this command on the ovirt-engine server (engine-config -s "UserDefinedVMProperties=noipspoof=^[0-9.]*$") 3. After that stop the VM and set a custom property named "noipspoof" with ip 10.10.10.6. 4. Run the VM and login via ssh,configure another ethernet with eth0:0 with the ip address 10.10.10.9 5. From another VM with ip 10.10.10.5 i can able to ping 10.10.10.9....
One strange thing is in VM xml still the filter is "vdsm-no-mac-spoofing" instead of "noipspoof"
---------------- <interface type='bridge'> <mac address='00:1a:4a:81:80:09'/> <source bridge='private'/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='up'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/ > ----------------
Please let me know if i am wrong here....
[image: Inline image 1]
On Tue, Jun 24, 2014 at 8:06 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Tue, Jun 24, 2014 at 05:52:51PM +0800, Punit Dambiwal wrote:
Hi Den,
Thanks for the updates...but still the user can spoof the another ip address by manually edit the ifcfg-eth0:0 file....
Like if i assign the 10.0.0.5 ip address to one VM through cloud-int...once the VM bootup user can login to VM and create another virtual ethernet device and add another ip address 10.0.0.6 to this VM....
I want in anyhow the user can not spoof the ip address....either they can edit but the new ip address can not boot up(should not active)...
Thanks, Punit
Have you placed my script properly? Could you share your domxml as visible to libvirt?
virsh -r dumxml <name-of-your-vm>
And as alluded by Sven - could you try to use the spooded IP address? Configuring is not blocked by the filter, only using it (try pinging outside of the VM).
Regrads, Dan.
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
-- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
On Wed, Jun 25, 2014 at 10:16:12AM +0800, Punit Dambiwal wrote:
Hi Dan,
I try the following way :-
1. I placed your script in the following location :- /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof & /usr/libexec/vdsm/hooks/before_nic_hotplug/50_noipspoof
2. Then run this command on the ovirt-engine server (engine-config -s "UserDefinedVMProperties=noipspoof=^[0-9.]*$") 3. After that stop the VM and set a custom property named "noipspoof" with ip 10.10.10.6. 4. Run the VM and login via ssh,configure another ethernet with eth0:0 with the ip address 10.10.10.9 5. From another VM with ip 10.10.10.5 i can able to ping 10.10.10.9....
One strange thing is in VM xml still the filter is "vdsm-no-mac-spoofing" instead of "noipspoof"
---------------- <interface type='bridge'> <mac address='00:1a:4a:81:80:09'/> <source bridge='private'/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='up'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/ > ----------------
Please let me know if i am wrong here....
I can try to help you debug the issue. Could you attach vdsm.log from the vmCreate command to the place where the VM turns to "Up"? Can you verify that /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof is executable to the vdsm user? Dan.
Hi Dan, Please find the attach logs. 1. vdsm.log (VM Creation) 2. vdsm1.log (when add custom property) 3. vdsm2.log (Start the VM) On Wed, Jun 25, 2014 at 3:57 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Wed, Jun 25, 2014 at 10:16:12AM +0800, Punit Dambiwal wrote:
Hi Dan,
I try the following way :-
1. I placed your script in the following location :- /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof & /usr/libexec/vdsm/hooks/before_nic_hotplug/50_noipspoof
2. Then run this command on the ovirt-engine server (engine-config -s "UserDefinedVMProperties=noipspoof=^[0-9.]*$") 3. After that stop the VM and set a custom property named "noipspoof" with ip 10.10.10.6. 4. Run the VM and login via ssh,configure another ethernet with eth0:0 with the ip address 10.10.10.9 5. From another VM with ip 10.10.10.5 i can able to ping 10.10.10.9....
One strange thing is in VM xml still the filter is "vdsm-no-mac-spoofing" instead of "noipspoof"
---------------- <interface type='bridge'> <mac address='00:1a:4a:81:80:09'/> <source bridge='private'/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='up'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/ > ----------------
Please let me know if i am wrong here....
I can try to help you debug the issue. Could you attach vdsm.log from the vmCreate command to the place where the VM turns to "Up"?
Can you verify that /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof is executable to the vdsm user?
Dan.
On Wed, Jun 25, 2014 at 06:03:50PM +0800, Punit Dambiwal wrote:
Hi Dan,
Please find the attach logs.
1. vdsm.log (VM Creation) 2. vdsm1.log (when add custom property) 3. vdsm2.log (Start the VM)
I see no reference there to /usr/libexec/vdsm/hooks/before_device_create (but other hook scripts are mentioned). Could you do # su - vdsm -s /bin/bash $ ls -l /usr/libexec/vdsm/hooks/before_device_create so we can confirm that the scripts exists and are executable?
Hi Dan, The permission looks ok... [root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]# But the strange thing is noipspoof hook not display in the host hooks windows.... On Wed, Jun 25, 2014 at 6:30 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Wed, Jun 25, 2014 at 06:03:50PM +0800, Punit Dambiwal wrote:
Hi Dan,
Please find the attach logs.
1. vdsm.log (VM Creation) 2. vdsm1.log (when add custom property) 3. vdsm2.log (Start the VM)
I see no reference there to /usr/libexec/vdsm/hooks/before_device_create (but other hook scripts are mentioned).
Could you do
# su - vdsm -s /bin/bash $ ls -l /usr/libexec/vdsm/hooks/before_device_create
so we can confirm that the scripts exists and are executable?
Hi Dan, The permission looks ok... [root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]# But the strange thing is noipspoof hook not display in the host hooks windows....please check the attachment. On Wed, Jun 25, 2014 at 6:30 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Wed, Jun 25, 2014 at 06:03:50PM +0800, Punit Dambiwal wrote:
Hi Dan,
Please find the attach logs.
1. vdsm.log (VM Creation) 2. vdsm1.log (when add custom property) 3. vdsm2.log (Start the VM)
I see no reference there to /usr/libexec/vdsm/hooks/before_device_create (but other hook scripts are mentioned).
Could you do
# su - vdsm -s /bin/bash $ ls -l /usr/libexec/vdsm/hooks/before_device_create
so we can confirm that the scripts exists and are executable?
Well this is strange, and this should not be the reason but can you attach a ".py" ending to the file names (maybe vdsm performs some strange checks)? your permissions look good. the only other thing I can think of are selinux restrictions, can you check them with: #this gives you the actual used selinux security level: getenforce :this gives you the selinux attributes for the folder: ls -lZ /usr/libexec/vdsm/hooks/before_device_create I first thought it might be related to vdsms sudoers rights but a plain python script should be executed without modification to the sudoers config. HTH Am 26.06.2014 06:22, schrieb Punit Dambiwal:
Hi Dan,
The permission looks ok...
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]#
But the strange thing is noipspoof hook not display in the host hooks windows....
-- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
On Thu, Jun 26, 2014 at 12:22:23PM +0800, Punit Dambiwal wrote:
Hi Dan,
The permission looks ok...
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]#
I'm out of guesses. It should not make any change, but please `service vdsmd stop`, wait a bit, and `service vdsmd start`.
But the strange thing is noipspoof hook not display in the host hooks windows....
That's not so strange - it is updated only when the host becomes operational. If you restart vdsmd as explained above, they should show up.
----- Original Message -----
From: "Sven Kieske" <S.Kieske@mittwald.de> To: users@ovirt.org Sent: Thursday, June 26, 2014 9:12:31 AM Subject: Re: [ovirt-users] Ip spoofing
Well this is strange, and this should not be the reason but can you attach a ".py" ending to the file names (maybe vdsm performs some strange checks)?
We do not ;-)
your permissions look good. the only other thing I can think of are selinux restrictions, can you check them with: #this gives you the actual used selinux security level: getenforce
That could be it
:this gives you the selinux attributes for the folder: ls -lZ /usr/libexec/vdsm/hooks/before_device_create
I first thought it might be related to vdsms sudoers rights but a plain python script should be executed without modification to the sudoers config.
HTH
Am 26.06.2014 06:22, schrieb Punit Dambiwal:
Hi Dan,
The permission looks ok...
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]#
But the strange thing is noipspoof hook not display in the host hooks windows....
-- Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Hi Sven, I already give the sudo user permission to VDSM user... Yes..after VDSM restart i can see this hook in host tab....I will test it again and udpate you guys if still not solve.... On Thu, Jun 26, 2014 at 4:03 PM, Antoni Segura Puimedon <asegurap@redhat.com
wrote:
----- Original Message -----
From: "Sven Kieske" <S.Kieske@mittwald.de> To: users@ovirt.org Sent: Thursday, June 26, 2014 9:12:31 AM Subject: Re: [ovirt-users] Ip spoofing
Well this is strange, and this should not be the reason but can you attach a ".py" ending to the file names (maybe vdsm performs some strange checks)?
We do not ;-)
your permissions look good. the only other thing I can think of are selinux restrictions, can you check them with: #this gives you the actual used selinux security level: getenforce
That could be it
:this gives you the selinux attributes for the folder: ls -lZ /usr/libexec/vdsm/hooks/before_device_create
I first thought it might be related to vdsms sudoers rights but a plain python script should be executed without modification to the sudoers config.
HTH
Am 26.06.2014 06:22, schrieb Punit Dambiwal:
Hi Dan,
The permission looks ok...
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]#
But the strange thing is noipspoof hook not display in the host hooks windows....
-- Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
Hi Dan, Still the same....VM can spoof the ip address...attached is the VM domain xml file.... On Thu, Jun 26, 2014 at 5:30 PM, Punit Dambiwal <hypunit@gmail.com> wrote:
Hi Sven,
I already give the sudo user permission to VDSM user...
Yes..after VDSM restart i can see this hook in host tab....I will test it again and udpate you guys if still not solve....
On Thu, Jun 26, 2014 at 4:03 PM, Antoni Segura Puimedon < asegurap@redhat.com> wrote:
----- Original Message -----
From: "Sven Kieske" <S.Kieske@mittwald.de> To: users@ovirt.org Sent: Thursday, June 26, 2014 9:12:31 AM Subject: Re: [ovirt-users] Ip spoofing
Well this is strange, and this should not be the reason but can you attach a ".py" ending to the file names (maybe vdsm performs some strange checks)?
We do not ;-)
your permissions look good. the only other thing I can think of are selinux restrictions, can you check them with: #this gives you the actual used selinux security level: getenforce
That could be it
:this gives you the selinux attributes for the folder: ls -lZ /usr/libexec/vdsm/hooks/before_device_create
I first thought it might be related to vdsms sudoers rights but a plain python script should be executed without modification to the sudoers config.
HTH
Am 26.06.2014 06:22, schrieb Punit Dambiwal:
Hi Dan,
The permission looks ok...
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]#
But the strange thing is noipspoof hook not display in the host hooks windows....
-- Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
----- Original Message -----
From: "Punit Dambiwal" <hypunit@gmail.com> To: "Antoni Segura Puimedon" <asegurap@redhat.com>, "Dan Kenigsberg" <danken@redhat.com> Cc: "Sven Kieske" <S.Kieske@mittwald.de>, users@ovirt.org Sent: Friday, June 27, 2014 11:07:56 AM Subject: Re: [ovirt-users] Ip spoofing
Hi Dan,
Still the same....VM can spoof the ip address...attached is the VM domain xml file....
Did you try to disable SELinux with "setenforce 0" to see if the problem is one of secure contexts?
On Thu, Jun 26, 2014 at 5:30 PM, Punit Dambiwal <hypunit@gmail.com> wrote:
Hi Sven,
I already give the sudo user permission to VDSM user...
Yes..after VDSM restart i can see this hook in host tab....I will test it again and udpate you guys if still not solve....
On Thu, Jun 26, 2014 at 4:03 PM, Antoni Segura Puimedon < asegurap@redhat.com> wrote:
----- Original Message -----
From: "Sven Kieske" <S.Kieske@mittwald.de> To: users@ovirt.org Sent: Thursday, June 26, 2014 9:12:31 AM Subject: Re: [ovirt-users] Ip spoofing
Well this is strange, and this should not be the reason but can you attach a ".py" ending to the file names (maybe vdsm performs some strange checks)?
We do not ;-)
your permissions look good. the only other thing I can think of are selinux restrictions, can you check them with: #this gives you the actual used selinux security level: getenforce
That could be it
:this gives you the selinux attributes for the folder: ls -lZ /usr/libexec/vdsm/hooks/before_device_create
I first thought it might be related to vdsms sudoers rights but a plain python script should be executed without modification to the sudoers config.
HTH
Am 26.06.2014 06:22, schrieb Punit Dambiwal:
Hi Dan,
The permission looks ok...
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ ls -l /usr/libexec/vdsm/hooks/before_device_create total 8 -rwxr-xr-x. 1 root root 1702 Jun 10 05:25 50_macspoof -rwxr-xr-x. 1 root root 2490 Jun 23 17:47 50_noipspoof -bash-4.1$ exit logout [root@gfs1 ~]#
But the strange thing is noipspoof hook not display in the host hooks windows....
-- Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
On Fri, Jun 27, 2014 at 05:07:56PM +0800, Punit Dambiwal wrote:
Hi Dan,
Still the same....VM can spoof the ip address...attached is the VM domain xml file....
<snip> yep, the hook script did not come into action.
<interface type='bridge'> <mac address='00:1a:4a:81:80:01'/> <source bridge='private'/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='up'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface>
and I am still at the dark regarding what could cause that. Would you repeat the following line, as root and as vdsm user? $ cd /usr/share/vdsm; python -c 'import hooks;print hooks._scriptsPerDir("before_device_create")'
Well I doubt this is a solution to this, anyway, if you want to check if it's a permission error due to not correctly configured selinux you could do: grep "avc" /var/log/auditd/auditd.log and configure your selinux correctly, no need to disable it. But I doubt that the "VM can spoof the ip address" you can configure it, sure, but you should not be able to access anything outside of the vm. another way to set this up, is, to configure the filter vdsm-no-mac-spoofing for each vm and to configure your network to not allow any other ip-packages from the given mac, and assign well known macs to each vm. you can also add vlans and proper subnetting to the mix to make it more secure. Am 27.06.2014 11:16, schrieb Antoni Segura Puimedon:
Did you try to disable SELinux with "setenforce 0" to see if the problem is one of secure contexts?
-- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
Hi Dan, Please find the below :- [root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ cd /usr/share/vdsm; python -c 'import hooks;print hooks._scriptsPerDir("before_device_create")' ['/usr/libexec/vdsm/hooks/before_device_create/50_noipspoof'] -bash-4.1$ Antoni @ selinux already in the permissive mode....do you want me to disable it ?? [root@gfs1 ~]# sestatus | grep -i mode Current mode: permissive Mode from config file: permissive [root@gfs1 ~]# On Fri, Jun 27, 2014 at 5:31 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Fri, Jun 27, 2014 at 05:07:56PM +0800, Punit Dambiwal wrote:
Hi Dan,
Still the same....VM can spoof the ip address...attached is the VM domain xml file....
<snip>
yep, the hook script did not come into action.
<interface type='bridge'> <mac address='00:1a:4a:81:80:01'/> <source bridge='private'/> <target dev='vnet0'/> <model type='virtio'/> <filterref filter='vdsm-no-mac-spoofing'/> <link state='up'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
function='0x0'/>
</interface>
and I am still at the dark regarding what could cause that. Would you repeat the following line, as root and as vdsm user?
$ cd /usr/share/vdsm; python -c 'import hooks;print hooks._scriptsPerDir("before_device_create")'
Hi, I found below messages in the audit log :- [root@gfs1 ~]# grep "avc" /var/log/audit/audit.log type=AVC msg=audit(1403834461.442:266685): avc: denied { read } for pid=27958 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:log rotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403835901.532:266865): avc: denied { read } for pid=29746 comm="xz" name="online" dev=sysfs ino=23 scontext=system_u:system_r:logrotate_t :s0-s0:c0.c1023 tcontext=system_u:object_r:sysfs_t:s0 tclass=file type=AVC msg=audit(1403836508.226:266868): avc: denied { signal } for pid=353 7 comm="sanlock-helper" scontext=unconfined_u:system_r:sanlock_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:virtd_t:s0-s0:c0.c1023 tclass=process type=AVC msg=audit(1403838061.918:266965): avc: denied { read } for pid=32528 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:log rotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403841661.051:267604): avc: denied { read } for pid=3256 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:logr otate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403841661.053:267605): avc: denied { read } for pid=3257 comm="xz" name="online" dev=sysfs ino=23 scontext=system_u:system_r:logrotate_t: s0-s0:c0.c1023 tcontext=system_u:object_r:sysfs_t:s0 tclass=file type=AVC msg=audit(1403845261.394:271326): avc: denied { read } for pid=6791 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:logr otate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403848861.538:271797): avc: denied { read } for pid=9269 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:logr otate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403852461.654:272828): avc: denied { read } for pid=12222 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:log rotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403852998.237:272831): avc: denied { signal } for pid=353 7 comm="sanlock-helper" scontext=unconfined_u:system_r:sanlock_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:virtd_t:s0-s0:c0.c1023 tclass=process type=AVC msg=audit(1403856061.898:273118): avc: denied { read } for pid=16215 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:log rotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403859661.098:273934): avc: denied { read } for pid=19991 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:log rotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir type=AVC msg=audit(1403863261.394:276053): avc: denied { read } for pid=24345 comm="logrotate" name="core" dev=dm-0 ino=789758 scontext=system_u:system_r:log rotate_t:s0-s0:c0.c1023 tcontext=system_u:object_r:virt_cache_t:s0 tclass=dir [root@gfs1 ~]# On Fri, Jun 27, 2014 at 5:35 PM, Sven Kieske <S.Kieske@mittwald.de> wrote:
Well I doubt this is a solution to this, anyway, if you want to check if it's a permission error due to not correctly configured selinux you could do:
grep "avc" /var/log/auditd/auditd.log
and configure your selinux correctly, no need to disable it.
But I doubt that the "VM can spoof the ip address"
you can configure it, sure, but you should not be able to access anything outside of the vm.
another way to set this up, is, to configure the filter vdsm-no-mac-spoofing for each vm and to configure your network to not allow any other ip-packages from the given mac, and assign well known macs to each vm. you can also add vlans and proper subnetting to the mix to make it more secure.
Am 27.06.2014 11:16, schrieb Antoni Segura Puimedon:
Did you try to disable SELinux with "setenforce 0" to see if the problem is one of secure contexts?
-- Mit freundlichen Grüßen / Regards
Sven Kieske
Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
Well selinux is not your problem as you run it in permissive mode, this means selinux violations will get logged but not be forbidden. -- Mit freundlichen Grüßen / Regards Sven Kieske Systemadministrator Mittwald CM Service GmbH & Co. KG Königsberger Straße 6 32339 Espelkamp T: +49-5772-293-100 F: +49-5772-293-333 https://www.mittwald.de Geschäftsführer: Robert Meyer St.Nr.: 331/5721/1033, USt-IdNr.: DE814773217, HRA 6640, AG Bad Oeynhausen Komplementärin: Robert Meyer Verwaltungs GmbH, HRB 13260, AG Bad Oeynhausen
On Fri, Jun 27, 2014 at 05:36:49PM +0800, Punit Dambiwal wrote:
Hi Dan,
Please find the below :-
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ cd /usr/share/vdsm; python -c 'import hooks;print hooks._scriptsPerDir("before_device_create")' ['/usr/libexec/vdsm/hooks/before_device_create/50_noipspoof'] -bash-4.1$
very odd. could you try again and attach a fresh log of the vmCreate flow? Maybe you could add a sys.stderr.write('%s' % os.environ) line in the main() function of the script just to see if it's ever called?
Hi Dan, I did the same as you suggested...please find the attached logs and domainxml.... On Fri, Jun 27, 2014 at 7:51 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Fri, Jun 27, 2014 at 05:36:49PM +0800, Punit Dambiwal wrote:
Hi Dan,
Please find the below :-
[root@gfs1 ~]# su - vdsm -s /bin/bash -bash-4.1$ cd /usr/share/vdsm; python -c 'import hooks;print hooks._scriptsPerDir("before_device_create")' ['/usr/libexec/vdsm/hooks/before_device_create/50_noipspoof'] -bash-4.1$
very odd. could you try again and attach a fresh log of the vmCreate flow? Maybe you could add a
sys.stderr.write('%s' % os.environ)
line in the main() function of the script just to see if it's ever called?
On Mon, Jun 30, 2014 at 10:11:21AM +0800, Punit Dambiwal wrote:
Hi Dan,
I did the same as you suggested...please find the attached logs and domainxml....
And now, the log does not mention any hook at all. Have you removed the macspoof hook which you had there before? How many hosts do you have? Do they have the same set of installed hooks on them all? Dan.
Hi Dan, Yes...i already removed the macspoof....i have 3 hosts in the cluster...but i have applied this hook on one server only..not all,but at the time of VM deployment i assign the specific host for the VM,so that the VM should deploy on the same host that has the hook. Do i need to install the hook on all the hosts and give a try ?? On Mon, Jun 30, 2014 at 3:46 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Mon, Jun 30, 2014 at 10:11:21AM +0800, Punit Dambiwal wrote:
Hi Dan,
I did the same as you suggested...please find the attached logs and domainxml....
And now, the log does not mention any hook at all. Have you removed the macspoof hook which you had there before? How many hosts do you have? Do they have the same set of installed hooks on them all?
Dan.
On Mon, Jun 30, 2014 at 06:17:25PM +0800, Punit Dambiwal wrote:
Hi Dan,
Yes...i already removed the macspoof....i have 3 hosts in the cluster...but i have applied this hook on one server only..not all,but at the time of VM deployment i assign the specific host for the VM,so that the VM should deploy on the same host that has the hook.
Do i need to install the hook on all the hosts and give a try ??
No, as long as you start the VM on the specific host you should be fine. The fact that the macspoof hook disappeared made me worry that you have not. Unfortunately, I have no more guesses why this specific hook would not run when it should. What happens when you put a silly script instead, that only does echo hello world > /dev/stderr can you see a trace of it in vdsm.log? Remind me, does PYTHONPATH=/usr/share/vdsm /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof.py --test work for you?
Hi Dan, I didn't understand about this,would you mind to more elaborate this :- --------------------- Remind me, does PYTHONPATH=/usr/share/vdsm /usr/libexec/vdsm/hooks/ before_device_create/50_noipspoof.py --test work for you? --------------------- I have this file in before_device_create without .py file extension should i change it with "50_noipspoof.py" ?? [root@gfs1 before_device_create]# ls 50_noipspoof [root@gfs1 before_device_create]# On Mon, Jun 30, 2014 at 7:12 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Mon, Jun 30, 2014 at 06:17:25PM +0800, Punit Dambiwal wrote:
Hi Dan,
Yes...i already removed the macspoof....i have 3 hosts in the cluster...but i have applied this hook on one server only..not all,but at the time of VM deployment i assign the specific host for the VM,so that the VM should deploy on the same host that has the hook.
Do i need to install the hook on all the hosts and give a try ??
No, as long as you start the VM on the specific host you should be fine. The fact that the macspoof hook disappeared made me worry that you have not.
Unfortunately, I have no more guesses why this specific hook would not run when it should. What happens when you put a silly script instead, that only does
echo hello world > /dev/stderr
can you see a trace of it in vdsm.log?
Remind me, does
PYTHONPATH=/usr/share/vdsm /usr/libexec/vdsm/hooks/before_device_create/50_noipspoof.py --test
work for you?
On Wed, Jul 02, 2014 at 09:55:19AM +0800, Punit Dambiwal wrote:
Hi Dan,
I didn't understand about this,would you mind to more elaborate this :-
--------------------- Remind me, does
PYTHONPATH=/usr/share/vdsm /usr/libexec/vdsm/hooks/ before_device_create/50_noipspoof.py --test
work for you? ---------------------
I have this file in before_device_create without .py file extension should i change it with "50_noipspoof.py" ??
[root@gfs1 before_device_create]# ls 50_noipspoof [root@gfs1 before_device_create]#
The .py extension is my typo; I'm shooting at the dark, trying to guess why the script does not even attempt to be run for you.
Hi Dan, Even now i install the noipspoof on all the hosts...but still the same result...user can be spoof On Wed, Jul 2, 2014 at 4:44 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Wed, Jul 02, 2014 at 09:55:19AM +0800, Punit Dambiwal wrote:
Hi Dan,
I didn't understand about this,would you mind to more elaborate this :-
--------------------- Remind me, does
PYTHONPATH=/usr/share/vdsm /usr/libexec/vdsm/hooks/ before_device_create/50_noipspoof.py --test
work for you? ---------------------
I have this file in before_device_create without .py file extension should i change it with "50_noipspoof.py" ??
[root@gfs1 before_device_create]# ls 50_noipspoof [root@gfs1 before_device_create]#
The .py extension is my typo; I'm shooting at the dark, trying to guess why the script does not even attempt to be run for you.
Hi Dan, If i use openstack neutron and integrate with ovirt....can it help to prevent the ip spoof ?? If yes...is there any good howto for install the neutron & integrate neutron with ovirt ?? Thanks, Punit On Wed, Jul 2, 2014 at 4:55 PM, Punit Dambiwal <hypunit@gmail.com> wrote:
Hi Dan,
Even now i install the noipspoof on all the hosts...but still the same result...user can be spoof
On Wed, Jul 2, 2014 at 4:44 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Wed, Jul 02, 2014 at 09:55:19AM +0800, Punit Dambiwal wrote:
Hi Dan,
I didn't understand about this,would you mind to more elaborate this :-
--------------------- Remind me, does
PYTHONPATH=/usr/share/vdsm /usr/libexec/vdsm/hooks/ before_device_create/50_noipspoof.py --test
work for you? ---------------------
I have this file in before_device_create without .py file extension should i change it with "50_noipspoof.py" ??
[root@gfs1 before_device_create]# ls 50_noipspoof [root@gfs1 before_device_create]#
The .py extension is my typo; I'm shooting at the dark, trying to guess why the script does not even attempt to be run for you.
Hi Jure, It's ok....but what about if user will spoof the ip on the eth0:0....then the mac address will be same as eth0 ?? how we can control this ?? Thanks, Punit D On Wed, Jul 9, 2014 at 3:38 PM, Jure Kranjc <jure.kranjc@arnes.si> wrote:
Hi,
I don't know if this is much help but here is our setup which works in a way that users cannot spoof public IP from inside VM. We've set up a MAC pool range on engine and a DHCP server on one VM, this server assigns IPs according to VMs MACs. We use CentOS6 nodes (and engine 3.3.5). The node always sees the VM's NIC by it's ovirt MAC, even if user changes it from inside VM. Now the solution was ebtables (bridge tables). We've set rules on bridge to public network which drops packets if they don't come from legit MAC/IP combination. Example:
-A FORWARD -p IPv4 -s 0:1a:4a:f9:xx:xx --ip-src ! IPADDRofVM -j DROP
Any comments on the setup are appriceated.
JureKr
On 06/19/2014 10:23 AM, Punit Dambiwal wrote:
Hi,
I have setup Ovirt with glusterfs...I have some concern about the network part....
1. Is there any way to restrict the Guest VM...so that it can be assign with single ip address...and in anyhow the user can not manipulate the IP address from inside the VM (that means user can not change the ip address inside the VM).
Thanks, Punit
_______________________________________________ Users mailing listUsers@ovirt.orghttp://lists.ovirt.org/mailman/listinfo/users
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participants (5)
-
Antoni Segura Puimedon -
Dan Kenigsberg -
Jure Kranjc -
Punit Dambiwal -
Sven Kieske