[Openswan Users] IPSec Tunnel up, but no traffic

[Paul Wouters]

On Sun, 18 Sep 2011, Will Roberts wrote:

> I'm having a problem with a tunnel between two hosts. The IPSec tunnel
> comes up without a problem, but when I try to establish the L2TP tunnel
> using xl2tp it doesn't succeed. Using tcpdump on both sides I can see
> ESP packets leaving the machine initiating the tunnel, but I can't see
> them arriving on the other side. I've run 'ipsec verify' on both ends
> and everything checks out.
>
> I can use both endpoints as participants in other tunnels and they work
> correctly in that case. Additionally this has worked in the past, but
> unfortunately I'm not sure what caused it to start failing.

Any xl2tpd log messages to proof you receive udp 1701 packets?
Ensure you are using a real listen address and not "any" in xl2tpd.conf

Paul