[sclug] VPN Help Needed

Dickon Hood sclug at splurge.fluff.org
Sat Aug 13 13:49:54 UTC 2005


On Sat, Aug 13, 2005 at 13:29:10 +0000, Tom Dawes-Gamble wrote:
: Hi Guys,

: I'm trying to get a VPN Working from IpCop (openSWAN) and a Draytek
: Vigor 2600.  According to the IpCop documentation if you can't ping and
: traceroute the remote end forget it.  Well I can ping and get a to the
: Web interface on the Draytek but traceroute fails.  

: If I run traceroute from a server in harbour exchange I end up with 

: 16  217.41.172.73 (217.41.172.73)  16.215 ms  14.693 ms  20.950 ms
: 17  217.41.216.2 (217.41.216.2)  8.003 ms  10.290 ms  8.670 ms
: 18  217.32.86.6 (217.32.86.6)  6.667 ms  6.731 ms  6.694 ms
: 19  host86-128-210-103.range86-128.btcentralplus.com (86.128.210.103)
: 19.059 ms  18.888 ms  17.850 ms

: If I tracetroute from my home sysytem

: 12  * * *
: 13  217.41.216.2 (217.41.216.2)  38.330 ms  33.377 ms  36.048 ms
: 14  217.32.86.6 (217.32.86.6)  37.563 ms  35.699 ms  33.375 ms
: 15  * * *

: And it doesn't get any further.

: So given that both traces get to  217.32.86.6 and the 86.128.210.103 the
: next place why does it fail from my home system?  

If I had to guess, I'd say that you've managed to convince your server
that your home system is at the end of your VPN, so it's trying to send a
packet back from there over it, and can't.

A dump of 'netstat -nr' from both hosts would be useful.

: Does anyone have a working OpenSWAN VPN I can use to test with to try
: and sort out where my problem lies?

Can't help there, I'm afraid.

-- 
Dickon Hood

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