I'm in no way a ovirt expert. But as Linux administrator, I would say that firewalld and iptables are "front-end" to kernel internal security tables, so, in the final of the day, will provide *almost* same functionality.
Seems that firewalld is able to activate modules without restarting entire firewall infra-structure, which iptables is not capable of. This leverage an advantage for firewalld, specially where you would not have interruptions in existing stateful connections.
I've used iptables *always* as replacement for firewalld because of almost 20 yrs using iptables - this is the first step in all about hundred Centos7 installations I've done past few years. I just can't throw away all my scripts that block hackers, provide
2 and 3 way "knock-knock" lockers, fail2ban customizations, nat rules, DMZ, and all, everytime a new "firewall" front end appears. I've seen at least two or three "iptables killers tech" in the past, and iptables still is the king - at least for me.
Again, repeating myself, I'm no ovirt specialist. Just a sazonal linux admin which will not jump from iptables train yet.
Perhaps, I would not reccomend to completely deactivate all firewall in any server! If it is the case, I would instead to advice to just replace firewalld with iptables-service (at least, in Centos7) - but only in case you have too much to loose without iptables
(as am I).
Regards,
Edson
De: eevans@digitaldatatechs.com <eevans@digitaldatatechs.com> Enviado: quarta-feira, 22 de abril de 2020 12:18 Para: francesco@shellrent.com <francesco@shellrent.com>; users@ovirt.org <users@ovirt.org> Assunto: [ovirt-users] Re: Safely disable firewalld [Ovirt 4.3]
If you log in to the cockpit, you can add services or custom ports easily. I would not disable the firewall.
<hostname:9090> for the cockpit.
Eric Evans
Digital Data Services LLC.
304.660.9080
I was wondering if it's "safe" disabling entirely the firewalld service and manage the firewall only via iptables, on the host and on the hosted engine (a self-hosted engine). It would make a lot easier the managing the firewall rules for me because of many
automatisms I created based on iptables. Did anyone manage to do this? Any contraindication for doing this or precaution that I have to take care of?