I can ping but can't telnet or access the applications over gre with ipsec

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Feb 18th, 2008
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Thanks in advance

One of my customer side iconfigure a network such as below


I configure gre tunnel betweeen two routers and protect that tunnel with the help of ipsec over the internet cloud.

I can ping web server but can't telnet to web server or access the web server.

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dongdongliu Mon, 02/18/2008 - 21:07
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are the port 23 and 80 both allowed on the router and firewall?

eyad_alnaqi Mon, 02/18/2008 - 23:41
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When you configure GRE over IPsec, you'll need to allow a number of ports in your two firewalls. For more info you can refer to Cisco's doc QL-9023-01 Chapter 2 (Firewall considerations).

I'm facing a similar problem using the following topology:

LAN - Router - p2p leased line - Router - LAN - Firewall - External network

The end users on left can ping but cannot access the server on the right-hand-side LAN although the firewall is beyond their destination!



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