Greetings,

I have a mystery on my hand and cannot figure as to why. I have a user on the road that need to make daily vpn connection to the network. The vpn connection work for awhile then stop. I have create two vpn connection on the laptop for testing purpose, one for company A (my workgroup) and one for company B (her workgroup) and to eleminate any firewall that would block the connection. Here is my mystery: After the vpn connection stop I found out that the norton firewall was blocking the connecttion so I cannot make any connection on the laptop. After disable and eventually uninstalling the norton firewall from the laptop I was able to establish a vpn connection on Company Aon the laptop. When I use the user vpn connection Company B I get a error code 721 - basically cannot make the connection. Now I'm on the other hand can vpn to Company B from my local computer, works just as intended. While connection to my workgroup comany A still connect, I try using her vpn connection and no connection. Anyone have any ideas as to why this happening?

Much appreciated for any tips. I cannot figure why since it work fine on my end and I can use one of the vpn connection on her machine. I have check all the setting on her server side and nothing usual, this is the same server I can vpn from my local machine.

Wind

Here today, gone yesterday.

You might want to go into the settings of connection B and change it from PPTP to L2TP. Those are the 2 most common protocols to connect to a VPN network with.

Tech Alpha Computer Forums

Check the TCP and UDP port option if you are using cisco VPN....if one is connected with UDP try TCP port on the other one....Another thing that you can use is the ip address of the host name that you are using to connect for VPN....

instead of hastname being "abc.def.ghi" enter 123.456.78.910

The firewall shouldn't or I'd say almost can't be the cause after the vpn is established unless an attack of some sort. See norton logs, see event viewer.

If you can establish a vpn then the normal reasons for dropping would be ip address lease times to isp changing or poor connections. See wireshark.

"Best Practices", Event viewer, host file, perfmon, are in my top 10