LXC not accepting incoming 192.168.1.x connection, but accepts WireGuard/Tailscale incoming connection

bigbeka

Member
Aug 4, 2022
2
0
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So I have LXC, which runs my docker and all small public facing stuff through reverse proxy. It have access to the internet, I can ping anything on any network it is connected to and it also accepts all connections on Tailscale. BUT, it does not accept LAN (192.168.1.71) incoming connections. For the life of me, I tried everything I came across on the internet. I tried to disable all possible firewalls, still no luck.

Hardware/software setup:
  • Proxmox VE on baremetal: 7.3-4 (local IP: 192.168.1.16/24 - vmbr0)
  • LAN NIC connected to the router with DHCP server
  • It is running 3 LXC and 2 VMs
  • Plenty of RAM, CPU and storage available (if it is relevant in any way)
  • LXC100 - Ubuntu 20.04 LTS (local IP: 192.168.1.71/24 - vmbr0) - this is where the issue is.
    • It is running some docker containers (I know container in a container)
    • It has Tailscale installed
All other VMs and LXC on the same Proxmox host accept incoming local network connections.
I truly don't know how to troubleshoot it, any help would be greatly appreciated.
As LXC100 runs public facing services that affect others (family members), I can't take radical troubleshooting steps that would put those services down for some time.
 

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