From: mike-newsgroup@-DELETETHISPART-.upcraft.com   
      
   Kai Schaetzl wrote:   
   > I'm trying to establish a VPN tunnel from my laptop over GPRS to my office   
   > LAN. VPN works fine from broadband or dialup, but GPRS fails.   
   >   
   > Client is Windows XP, Server is pptpd/pppd on a Snapgear appliance, mobile   
   > provider is O2 Germany.   
   > It seems the GPRS connection works via NAT and that this may be the cause   
   > of the problem. The log shows "LCP: timeout sending Config-Requests" which   
   > might also indicate that my side couldn't answer because of NAT.   
   >   
   > Is there anything I can do about that concerning the server configuration?   
   > I do have good knowledge about Linux and partly about networking but   
   > exactly none about pptpd/pppd, I just use the web interface provided by   
   > the router. I can edit configuration files (pptpd.conf and options.pptp as   
   > I understand) directly if necessary.   
   >   
   > Other possible causes might be MTU or the GPRS gateway not allowing highly   
   > encrypted authentication. I tried everything down to even no   
   > authentication, nothing worked over GPRS. MTU seems to be at normal 1500.   
   > So, I think both are not relevant here.   
   >   
   > Kai   
   >   
      
   Nothing you can do but complain to the GPRS service provider.   
      
      
      
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   Mike Drechsler (mike-newsgroup@-deletethispart-.upcraft.com)   
      
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