After upgrading from 3.3-5 to 3.4-6 I can't get GRE traffic to/from pfSense VM. Other traffic (ICMP, TCP, UDP) is working fine.
The firewall is disabled at the VM level, so all traffic should pass.
As soon as I disable the firewall at the datacenter level, then GRE traffic to/from the VM is...
For months I run DRBD 8.4.2 (instead of the built-in 8.3.x) on Proxmox VE 2.x, because of the splitbrain bugs in 8.3 and the nice new multi-disk resource feature in 8.4. I followed e100's approach (thanks BTW!) and rebuilt the drbd module with every PVE kernel update (using module-assistant)...
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