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Router is not accessible from LAN while VPN client is active

Activating OpenVPN client somehow blocks traffic from LAN to router - reForis freezes, router is unreachable via icmp and so on. VPN tunnel and traffic passing through router seems to work fine.

When vpn client instance is stopped, then router is reachable from LAN again.

I am not aware of any changes in firewall rules between stopped and running vpn client.

How to reproduce

TOS 5.3.3 (HBS)

  1. Configure Omnia as VPN server
  2. Configure Mox as VPN client with config from Omnia's VPN server.
  3. Try to reach router (ping, reforis, ssh) from device on Mox own LAN

PS: I am not sure what is the real culprit here and I would gladly move this issue elsewhere.

Edited by Martin Matějek