[VPN] "Routing Table Can't be Altered"

Bill Yazji byazji at psualum.com
Tue Feb 17 17:34:02 EST 2004


Users can get this if they get a new IP address from a Linksys-type router,
or if the router uses PPPoE and disconnects.
 
Also - if the machine has 2 NICs in it - and one gets a new IP after the VPN
client is up - this will also cause the error.
 
It isn't really a bug - but more of a security feature. If the TCP/IP stack
is altered, the tunnel drops. It's a good thing :) 

  _____  

From: vpn-bounces+byazji=psualum.com at lists.shmoo.com
[mailto:vpn-bounces+byazji=psualum.com at lists.shmoo.com] On Behalf Of sunil
Shetty
Sent: Tuesday, February 17, 2004 5:50 AM
To: VPN at lists.shmoo.com
Subject: [VPN] "Routing Table Can't be Altered"



Hi All,

Contivity VPN Clients get the message "Routing Table Can't be Altered" and
get disconnected.

We have analyzed the problem and found the reason to be Routing table
changes from Tech-Tip (Nortel Documentation).

We tried MTU Fix (reduce MTU to lower value)-- It worked for some users, we
tried DYNAMIC DNS DISABLING -- this also worked for some users likewise we
also tried ICMP redirect and RIP/OSPF Routing table updates, Internet
Connection sharing.

In order to get rid of these problems we have suggestd users to install
Contivity client - V 4.65_32. Still the users are getting this problem.

Any help on this will be Highly Appreciated. Thanks in Advance.

Swamy Patil 



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