VPN Connectivity Problem

5 pts.
Tags:
Cisco VPN
Verizon Wireless AirCard
VPN connectivity
Wireless
I connect to mobile software through an embedded Verizon aircard and a cisco VPN.

I am losing connectivity to my mobile software

I disabled the Wi-fi and wireless Bluetooth connections

Here’s how I connect to the software:

I  connect to the aircard and the VPN successfully

I then connect to the mobile software successfully

I also setup a persistent ping to the server to watch the connectivity

After about 20 minutes I get Request Timed Out on the ping

The mobile software no longer works properly.

I am able to ping the aircard from the server, but I am not able to ping the server from the aircard

The computer does not show a disconnect from neither the aircard or the VPN

I contacted the VPN support and they watched the traffic that was coming from the aircard’s IP address and when I started to get the “Request Timed Out” error the VPN support tech was still showing that I was actively connected. And they did not see any disconnect or reject errors.

I cannot determine why I am getting the “Request Timed Out” error and losing connectivity any suggestions?



Software/Hardware used:
Embedded Verizon Aircard, Cicso VPN

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Has this ever worked on this client? Are you in a location with other wireless interference? Have you tried VPN connectivity on a wired connection? Is there an update to the mobile wireless access software? Is there a firmware upgrade for the integrated card?

Note that a lot of VPN software is very sensitive to routing changes and dynamic IP address changes (this makes the “trusted” network connection become “untrusted”). So, if the wireless connection is intermittent/unreliable, then it is possible that the VPN connection is deauthenticating or losing routing information causing the connection to drop.

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  • Want2knowit
    In my own view, I think the connection drops because, it might be that there may be an over use of bandwith at the forwarding end of the VPN connection that has choked the forwarding end. Hence, timing out the connectivity... Also, it might be that, the VPN server's firewall has been set to block connections that may use up excessive bandwith, or even Ping Of Death(POD) that may go through the connection. And so, the firewall may block any client computer or connection that may be sending so many pings to the server...
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