name resolution problem when using wired connection for VPN

Rick Stevens rstevens at vitalstream.com
Thu Mar 3 18:19:25 UTC 2005


Scot L. Harris wrote:
> This is an odd problem.
> 
> Using FC3 2.6.10-1.760_FC3 with Cisco VPN Client 4.0.4 on a Toshiba
> Tecra M2 Laptop which has the 2200BG wireless chip set.  It also has a
> Intel 82540EP Gigabit Ethernet Controller for wired connections.
> 
> I can establish a VPN connection just fine using the wireless
> connection, everything works as expected.
> 
> However, when I use a wired connection the VPN appears to be established
> just fine.  But when I try to access anything the name resolution fails.
> I have checked and compared the /etc/resolv.conf files as well as the
> netstat -rn outputs for both wired and wireless connections.  Everything
> appears to be the same.
> 
> Running ethereal I can see the DNS queries go out and what appears to be
> encrypted replies coming back (I suspect I see the outgoing queries
> un-encrypted because ethereal gets the packet prior to the VPN).
> 
> Google results have not returned anything that looks the same as this
> problem.  
> 
> If this was a problem with the VPN client I would expect it not to work
> with either connection not just with wireless.

Did you check iptables and make sure that it's not blocking eth0 stuff
(the wireless is probably wlan0 and may be wide open).
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- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
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-                      LOOK OUT!!! BEHIND YOU!!!                     -
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