From: efflandt@xnet.com   
      
   On Tue, 03 Feb 2004 15:34:19 +0800, case  wrote:   
   > The ESP destination IP port number is 50, this port is UDP or TCP?   
   > or both of them?   
      
   I believe the answer is "none of the above".  If you are trying to use   
   ipsec the answer is "protocol" 50 (not a port).  So if you need to forward   
   or not block it, you need something capable of recognizing or forwarding   
   protocols (like Linux iptables).   
      
   However, ipsec also needs UDP port 500.   
      
   I have not used a hardware router that does VPN passthrough, so I am not   
   sure how those are configured.   
      
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   David Efflandt - All spam ignored  http://www.de-srv.com/   
      
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