[Openswan Users] Problem Net-to-road - tunnel goes up, but no traffic seems to come through

[Stefan Kuhlemann]

Hi all,

at the moment, I am playing with VPN/Openswan.
My network setup looks like:

internal net 10.3.8.0/24 -- GW Linux (int: 10.3.8.35 / ext: 
212.34.1xx.xxx) - internet - ClientPC with dialup and 'SSH Sentinel / WinXP'

Everything seems to work fine, since the tunnel with PSK authentication 
seems to come up without problem.  See:

Jul 12 19:27:40 firewall pluto[4845]: "haiger" #5: transition from state 
STATE_MAIN_I1 to state STATE_MAIN_I2
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #5: transition from state 
STATE_MAIN_I2 to state STATE_MAIN_I3
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #5: Peer ID is 
ID_IPV4_ADDR: '62.153.1xx.xxx'
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #5: transition from state 
STATE_MAIN_I3 to state STATE_MAIN_I4
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #5: ISAKMP SA established
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #6: initiating Quick Mode 
PSK+ENCRYPT+TUNNEL+PFS+UP {using isakmp#5}
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #6: transition from state 
STATE_QUICK_I1 to state STATE_QUICK_I2
Jul 12 19:27:40 firewall pluto[4845]: "haiger" #6: sent QI2, IPsec SA 
established {ESP=>0xa0520422 <0x1826cbe4}

But  I don't get any traffic through the tunnel. No ping, no http-requ., 
and so on....
..the route seems also correctly created...

the 'ipsec barf'-output seems also ok....and also 'flushed' the iptables 
for testing....

Any hints, what's causing this problem?

thnx in advance

Stefan