[Engine-devel] Proposed change in default port numbers

[Juan Hernandez]

On 07/18/2012 11:39 AM, Shireesh Anjal wrote:
> On Tuesday 17 July 2012 11:57 PM, Juan Hernandez wrote:
>> On 07/17/2012 08:19 PM, Steve Gordon wrote:
>>> ----- Original Message -----
>>>> From: "Juan Hernandez" <jhernand at redhat.com>
>>>> To: "Andrew Cathrow" <acathrow at redhat.com>
>>>> Cc: engine-devel at ovirt.org
>>>> Sent: Monday, July 16, 2012 3:27:02 PM
>>>> Subject: Re: [Engine-devel] Proposed change in default port numbers
>>>>
>>>> On 07/16/2012 09:21 PM, Andrew Cathrow wrote:
>>>>>
>>>>> ----- Original Message -----
>>>>>> From: "Juan Hernandez" <jhernand at redhat.com>
>>>>>> To: engine-devel at ovirt.org
>>>>>> Sent: Monday, July 16, 2012 2:44:40 PM
>>>>>> Subject: [Engine-devel] Proposed change in default port numbers
>>>>>>
>>>>>> Hello all,
>>>>>>
>>>>>> In change http://gerrit.ovirt.org/6348 I am proposing to change
>>>>>> the
>>>>>> default port numbers used by the engine, in order to avoid
>>>>>> conflicts
>>>>>> with the default ports used by JBoss.
>>>>> To be clear though even if we moved to use port 6090 for http and
>>>>> 6091 for https we'd still have 80/443 available through the
>>>>> installer.
>>>> Correct, 80 and 443 will continue to be the default ports when using
>>>> Apache as proxy in front of JBoss:
>>>>
>>>>    80 -> 80 (no change)
>>>>    443 -> 443 (no change)
>>>>    8080 -> 6090
>>>>    8443 -> 6091
>>> This is probably a stupid question, but what are the following ports used for:
>>>
>>>>    8009 -> 6092
>> This port is used for the communication between the Apache web server
>> and the JBoss application server using the AJP protocol. It doesn't need
>> to be available outside of the machine.
> 
> The "Firewall Configuration" chapter of oVirt installation guide 
> (http://wiki.ovirt.org/wiki/File:OVirt-3.0-Installation_Guide-en-US.pdf) 
> says that ports 8006 through 8009 are required for network communication 
> from "Administration Portal Clients" to "oVirt Engine".

Sure this has roots in the past, but today we don't have any program
listening in ports 8006, 8007 or 8008, and 8009 is only used for AJP, no
one connects there from outside the machine. I proposed yet another
change to remove the message about those ports from the setup tool:

http://gerrit.ovirt.org/6386

I am not 100% sure, but if these ports are really not used then the
documentation should also be updated.

>>>>    4447 -> 6093
>> These port is used by the remoting capability of the application server:
>> calling EJBs from external applications. We don't use it but it is
>> required anyhow. It doesn't need to be available outside of the machine.
>>
>>>>    4712 -> 6094
>>>>    4713 -> 6095
>> These two ports are used by the transaction manager inside JBoss. They
>> don't need to be available outside of the machine.
>>
>> So none of them needs a firewall rule to allow inbound traffic. I am
>> proposing a different change to bind those ports to the loopback address
>> so that they are not available even when the firewall is disabled:
>>
>> http://gerrit.ovirt.org/6349
>>
>> I would disable them completely, but didn't find the way to do it yet.
>>
>>> As far as I know we don't have them listed anywhere in the documentation as requiring a firewall rule to allow them, should we?
>> They don't require a firewall rule to allow incoming traffic. We could
>> explain in the documentation that they are required, but only for
>> communications internal to the machine.
>>
> 
> 
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