UDP 1194 packets not reaching vmbr0 on new OVH Proxmox server, but working on old OVH server

Z

zikou

Member
Nov 13, 2024
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Hello everyone,


I’m running Proxmox VE on two OVH dedicated servers — an old one and a new one. Both have similar network setups with public IPs assigned on vmbr0. I am trying to run OpenVPN on UDP port 1194, using a pfSense VM behind the Proxmox host.


Setup details:


  • vmbr0: public IP (e.g., 142.76.x.x/24)
  • vmbr1: private subnet for pfSense WAN (e.g., 10.50.0.1/24)
  • vmbr2: private subnet for pfSense LAN (e.g., 10.60.0.1/24)
  • pfSense WAN IP: 10.50.0.252
  • pfSense LAN IP: 10.60.0.252

Issue:


  • On the old OVH server, UDP packets to port 1194 on the public IP reach Proxmox’s vmbr0 interface and OpenVPN works fine through DNAT to pfSense.
  • On the new OVH server, sending UDP packets to port 1194 on the public IP does not show any packets arriving on vmbr0 (verified via tcpdump). DNAT and firewall rules on Proxmox appear to be set up correctly, IP forwarding is enabled, and pfSense is configured the same way.
 
Bob.Dig said:
If you don't show any configs, it is hard to say anything.
Click to expand...
like what you need
for example when i send a packet udp port 1194 from my laptop to vmbr0 I dont see that packet when I run tcpdump
but for tcp it work fine
 
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