Hi all,
I have set up a site-to-site WireGuard VPN between two networks using Fritzbox routers as the VPN servers (one on Network A and one on Network B).
Strange enough, from my Proxmox host, I can ping any device on Network A without issue.
Things I've Tried:
I have set up a site-to-site WireGuard VPN between two networks using Fritzbox routers as the VPN servers (one on Network A and one on Network B).
Network Setup:
- Network A: 192.168.2.0/24 (Fritzbox Router with Wireguard Server at 192.168.2.1)
- Network B: 192.168.3.0/24 (Fritzbox Router with Wireguard Server at 192.168.3.1)
- Proxmox Server: 192.168.3.33 on Network B. My Proxmox is up to date (version 8.3.4)
The Issue:
From Network A (192.168.2.0), I can ping any device on Network B (192.168.3.0) except my Proxmox host and any VM that runs on this Proxmox host.Strange enough, from my Proxmox host, I can ping any device on Network A without issue.
Things I've Tried:
- Checked Routing: On Proxmox, the default route is pointing to 192.168.3.1 (Fritzbox B), which should be correct.
- Disabled Proxmox firewall: No change.
- tcpdump: Shows ICMP requests from Network A. So the ping is reaching the Proxmox host, but somehow the replies don't find their way back to the pinging device on Network A.
- IP Forwarding: Confirmed that IP forwarding is enabled on Proxmox (sysctl net.ipv4.ip_forward = 1).
- Checked the ARP table: No strange entries, all IPs seem correctly mapped.