From: jorge.balseirolopez@wanadoo.es   
      
   Dear folks:   
      
   I´m trying to solve a problem with VPN connections and Windows XP. My   
   network configuration is as follows:   
      
       - MS Small Business Server 2000 (W2K Server Service Pack 4) with RAS   
   enabled and properly configured   
       - Cisco 1721 DSL Access Router with static routing to server´s IP   
   address (port 1723 open) and GRE protocol enabled.   
      
   Curious situation: any Windows 2000, 9x client can connect via VPN   
   connection, but XP clients don´t pass through the authentication process.   
   They establish the connection, trying to check usrname and password, and   
   after a while I get error #721: The server is not responding.   
      
   Any ideas? I´ve been looking around for similar problems, but no solution   
   found yet.   
      
   Thanks in advance,   
      
   Jorge Balseiro.   
   IT Manager   
   InforHouse S.L.   
      
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