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Home » Kerio User Forums » Kerio Control » Weirdest VPN problem: clients connect but there is 50-70% ping loss!!!! (Clients connect, no errors on server logs, but: there is a 50-70% ping loss both from clients to server and vice versa)

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I've got a fairly typical Winroute Set-up. Kerio version is the latest both for the server and the VPN clients.

Network topology is typical as well. Kerio has 4 interfaces, 2 are connected, and another 2 will be used for DMZs. Of the 2 used, one connects to the internal network and the other to the Internet. Incoming/outgoing traffic to/from the internal network works fine

I have set up the VPN server on port 55555, and modified the Kerio VPN service accordingly. My router uses port forward to send traffic on port 55555 from the Internet to the Kerio Winroute firewall server.

Clients connect with no problems, and receive the correct IP addresses and routes.

However, when trying to ping anything from the VPN Client to the Internal Network, or to any interface of the Firewall, pings fail at a rate of at least 50%. It might go up to 70-80% at worst... Nothing else seems to work. No Outlook-Exchange connectivity, no RDP, no file sharing.

The correct rules for Local traffic are in place... I cannot think of anything else that might be wrong...

Any suggestions.... PLEASE!!!!!

[Updated on: Wed, 30 April 2008 12:24]

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