Q
Problem solve Get help with specific problems with your technologies, process and projects.

Network server loss with a VPN connection

When using ISA 2000, some users can lose connection to the network and experience packet loss even if the VPN client is still connected. Learn how to diagnose the problem in this expert tip.

A client using ISA 2000 can't connect to their network servers when connecting through a VPN. At first they can access them, but after a few minutes they can't access the servers. The VPN connection is still connected, but they can't do anything on the network remotely. What could be causing the network server loss?

From your description it's hard to tell what's happening from your description, and there doesn't appear to be any relevant information in the Microsoft Knowledge Base, so while we can't say what the problem is we can rule out some things. Because the VPN is still connected, it's unlikely that your client is experiencing VPN timeouts or negotiation problems. Because the users do have connectivity for a few minutes, you don't have a firewall problem or other difficulty in making a connection to the servers.

To help diagnose the problem, make sure that the ISA logs are enabled (see this Knowledge Base article for help in configuring them) and check them for indications of problems after your client's users lose connectivity. If the logs don't reveal the problem, you will have to use a package capture utility, such as tcpdump or OmniPeek, to see where the packets are being lost.

Dig Deeper on MSPs and cybersecurity

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

MicroscopeUK

  • IT Lab acquires Mirus IT

    Managed services player with a focus on Microsoft takes revenues past the £75m mark with a move to pick up Mirus

  • Cyber security and the channel

    Leading lights in the industry give their assessment of where the cyber security market is headed in the second half of 2019

  • SCC investing in the future

    Channel player delivers solid set of numbers for its fiscal year at the same time as investing in IT systems to support future ...

SearchSecurity

SearchStorage

SearchNetworking

SearchCloudComputing

SearchDataManagement

SearchBusinessAnalytics

Close