cf6aebdd   
   From: stephen@dino.dnsalias.com   
      
   glenn.r.holder@delphi.com writes:   
   > I'm not sure anyone can help, however, I would appreciate some   
   > advice.  I have a Dell Laptop (Latitude D610) equipped with an AT&T   
   > Global Client VPN. The router I am using at home is a NETGEAR WGR614   
   > v6, supplied by my broadband cable company. I have 3 home computers   
   > using the router without any issue. However, when I run my laptop (4th   
   > computer) accessing my company website, using the VPN, my laptop will   
   > "reboot" itsself anywhere from 1/2 hour to 2 hours later.This does not   
   > happen when I bypass the router and run directly off the broadband   
   > line. I've reset the router, bu that does not seem to help. Looking   
   > for help!! Thanks, in advance.   
      
   If the laptop is rebooting then the bug is either in the AT&T VPN   
   Client or some other software on the laptop.  You didn't say which   
   version you are using so if isn't the latest (7.3) then try upgrading.   
   If you are using the latest version then submit a bug report about the   
   AT&T VPN Client.   
      
   As to why the reboot only occurs when behind the NETGEAR, then one   
   possibility is that the bug in the VPN client is related to NAT.  When   
   you directly connect then there is no NAT and so the IKE protocol that   
   the VPN client uses does not detect any NAT and so all the encrypted   
   traffic uses the ESP protocol (protocol 50) directly.  When you   
   connect via the NETGEAR I assume you have it setup to NAT all outbound   
   traffic.  Thus the IKE protocol would detect NAT that the NETGEAR is   
   doing and extra code is run to handle the NAT and change the encrypted   
   traffic to use UDP encapsulated ESP.  Given that the reboot doesn't   
   happen right away then the bug may related to re-keying or it could be   
   an uninitialized memory read and most of the time it reads a benign   
   value but if you run it long enough then eventually the uninitialized   
   value is not benign and it causes a crash and reboot.   
      
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