Proxmox VE Firewall Configuration

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bhagat.sameer

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Sep 9, 2014
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Hi,

I am bit new to Proxmox Firewall feature. I have cluster of Proxmox with 4 servers and multiple Containers on them. I am able to use Live migration and other cluster features. My Proxmox Hosts are exposed to public network and i am worried about hacking of my system. I have Firewall, IDS and IPS installed and working fine on my Containers but i still dont have any Firewall rules on my Hosts. I feel that if someone is able to get into my host server...boom they can do anything with my whole setup.

I would like to know how how can secure my host server using Firewall. Also will the configuration of Firewall will effect my CT? Do i need to configure port forwarding for the ports required for my CT? I tried configuring Firewall on hosts but it brings down my cluster.

Any help or suggestion is much appreciated.

Thanks
 
bhagat.sameer said:
I would like to know how how can secure my host server using Firewall. Also will the configuration of Firewall will effect my CT? Do i need to configure port forwarding for the ports required for my CT? I tried configuring Firewall on hosts but it brings down my cluster.
Click to expand...

What I did initially was move all containers off one of hosts and test out the rules on that host only. After experimenting I was then confident enough that I could apply the rules in one place at the datacenter level, which covers all hosts. The host rules are separate from the containers.

Do you have a static IP that you connect from and which need full access to the hosts?

At the datacenter level, I configured an alias 'office' with a single IP which is the gateway for my office network.

In the Rules section I created a couple of rules:

ACCEPT incoming using SSH macro, source: 'office'
ACCEPT incoming TCP port 8006, source: office

I also set up a rule using the Ping macro to allow from all as I monitor the hosts externally. I also set these rules on the vmbr0 interface only.

I then enabled the firewall (I have out-of-band console access in case of any problems with this).

From another unrelated host, I ran nmap to check the firewall. The only port it found is 43/whois (which is closed, but for some reason allowed by the default rules)
 
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