L2TP - server not answering

RouterOS General
1

Hi,

I just tried to set up a L2TP server but it’s not working

I can see the incomming connections (Firewall - Connections) for UDP 500, 1701 and 4500 but the L2TP server is answering:

  • Firewall rule: 500, 1701, 4500 - input
  • created interface l2tp-in1
  • created secret
  • created profile
  • created peer in IPsec
  • created IPsec proposal

In IPsec policies I can see the Src Address from my external device.

Do you have any ideas or do you need more information?

THANKS

2

Found something:

My current configuration is DSL router (AVM fritzbox) → Mikrotik. When I configure the DSL router as a modem (PPPoE on the Mikrotik side) it’s working properly. I think the DSL router in router mode blocks something, although UDP 500, 1701, 4500 and ESP is forwarded to the Mikrotik router.

Any ideas?