LT2P Successfully connected but no traffic pass from the tunnel!

[Kostas C]

Good Evening! 

I have a very big issue with an L2TP tunnel which is connecting with a Windows 10 PC using the Windows VPN Setup but cannot pass traffic from the tunnel to reach the LAN network or the LAN network to reach the PC ( Client). 

Phase 1 and Phase 2 both seems ok. 

[Gustavo Medina]

Hello Kostas,

What is the VPN headend you are connecting to?

Do you see the packets arriving to the headend? Have you configured a packet capture yet?

I assume the client is behind NAT but what about the Headend? Is it behind NAT too?

Regards,

-Tavo

[Kostas C]

No there is not NAT before Cisco Router! Cisco Router is doing nat. The client yes is behind NAT. 

If i will post the config it will make sense to find the issue ?

[MANI .P]

Hi ,

can you share

 01. debug phase 1 & Phase 2 .

02. what is the state & status of phase 1 & phase 2 .

03. if both are okay .  you check the packet-tracer and check .

04. later ensure that the laptop is behind the NAT device and the ports are allowed esp 

thanks ,

Mani

[Kostas C]

Yeap Phase 1 and Phase 2 is seems ok but i will post the results in order to ensure that everything is ok!

Yes ESP is allowed because i have some more Side to Side IPsec VPN and they are working ok! The issue is regarding the L2TP/IPSEC which i want it for the clients.