[Vtun-Users] vtund stops working

[Tom D. <to...@ip...>]

hello list

I've got a wierd problem with vtun, maybe someone can give me a hint :p

vtund suddenly stops working for an unknown reason.

I have 2 machines , A and B

looks like this for the client A :

fw# ps aux | grep vtund
root     494  0.0  0.2  1868   96  ??  Is   27Apr03   0:00.01 vtund: waiting
for connections on port 5000 (vtund)
root   62780  0.0  1.6  2384  960  ??  S<   Thu02PM   8:04.98 vtund: lyon
tun tun1 (vtund)
root   76557  0.0  1.9  2448 1172  ??  I<s  Tue12PM  84:43.47 vtund: tom tun
tun2 (vtund)

fw# ifconfig tun2
tun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
        inet6 fe80::200:e8ff:feee:c2ce%tun2 prefixlen 64 scopeid 0x7
        inet 192.168.1.1 --> 10.0.2.1 netmask 0xffffff00
        Opened by PID 76557


fw# sockstat -4cl | grep 5000
root     vtund    76557    4 tcp4   193.251.xx.xx:4200    81.49.xx.xx:5000
root     vtund    62780    5 tcp4   193.251.xx.xx:5000
212.180.xx.xx:52810
root     vtund      494    4 tcp4   *:5000                *:*



looks like this for the server  B

> ps aux | grep vtund
root     261  0.0  0.4  2704 1016  ??  S<s   9:20PM   0:00.25 vtund:
poleymieux tun tun2 (vtund)
root     263  0.0  0.3  2124  836  ??  Is    9:20PM   0:00.00 vtund: waiting
for connections on port 5000 (vtund)

> ifconfig tun1
tun1: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
        inet 10.0.2.1 --> 192.168.1.1 netmask 0xff000000


> sockstat -4cl | grep 5000
root     vtund      263    4 tcp4   *:5000                *:*
root     vtund      261    4 tcp4   81.49.xx.xx:1039     213.245.xx.xx:5000



what i dont get is : why does the client think he is still connected when he
in fact isn't ?
if i dont kill 76557 on the client and restart vtund, my VPN will no longer
work.

both clients are running freebsd version 4.8-STABLE , but the client is
running version 2.5 . server is running version 2.6

No IP's have been changed.

Thanks ,


Tom