[SOLVED] Firewall blocking incoming traffic

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Strange0ne

New Member
Mar 12, 2023
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Hi!
I have a server with installed proxmox 7.3. After I enable datacenter firewall with ACCEPT input policy, I can't connect to my VMs. Please help me understand what I'm doing wrong =)
 
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Strange0ne said:
Hi!
I have a server with installed proxmox 7.3. After I enable datacenter firewall with ACCEPT input policy, I can't connect to my VMs. Please help me understand what I'm doing wrong =)
Click to expand...
datacenter rules only apply to all proxmox hosts management ip, not vms.

you need to add rules for each vm.
 
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Thanks for your reply, but I add rules to all levels. More than that, if I disable firewall, I still can't ping my VM. After I delete all files from /etc/pve/firewall and restart the server, ping and other connections works again(((



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spirit said:
are you sure that you don't have mtu problem with fragmented packets ? (firewall drop fragmented packets)

can you try: "ping -m do -s 1470 ..." ? (with firewall disabled)
Click to expand...
When I try to ping with those flags, I get an error)
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spirit said:
ok, so it's ok for this.

can you try to disabled ebtables in datacenter option ? (filtering mac address)
Click to expand...
Sure, but it didn't help(
I don't understand why I can't ping VM even firewall turned off.

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