XPost: comp.dcom.sys.cisco   
   From: am@am.am   
      
   Hi all,   
      
   I hope someone of you can answer my question.   
   I want to get some sort of access control over who connects to my Cisco box   
   and gets outside to Internet.   
   I configured the PPTP protocol and from Windows machine it runs very well.   
   Basically I enabled the vpdn on the router and on ethernet0 I allow only tcp   
   1723 and gre to it.   
   It works pretty fine. Everyone who wants to get access must authenticate   
   itself on the router.   
   And you can configure what the authenticated people can do with an ACL put on   
   incoming connection on int   
   virtual-template chosen for the vpdn group.   
   So everything travels over this pptp tunnel. But some of clients connected   
   need to establish a VPN tunnel to Intranet   
   companies so IPsec must works over PPTP. I experienced that is quite not   
   stable so I would like to switch from PPTP to   
   L2TP. And possibly to add CA authentication.   
      
   May anybody of you tell me where to find out some samples to set up a L2TP   
   tunnel, no encryption and with authentication   
   through CA certificates (the last issue is more important for me as I'll be   
   starting from scratch with that topic)?   
      
   Alex.   
      
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