Web Browser Stop Working after VPN Client Installation

Discussion in 'Cisco' started by Ross, Mar 26, 2008.

  1. Ross

    Ross Guest

    Hi there,
    I have a Cisco PIX515E server, and users are using Cicso VPN client version
    4.x or 5.x. This system has been working fine.
    But I suddenly got one weird problem on one user's laptop ...
    This is an IBM/Lenovo ThinkPad laptop with Windows XP Pro. Once I installed
    the Cisco VPN client, I could NOT access any web sites (either on Internet
    or inside the corporate network) over http using any web browser (either IE
    or Firefox).
    But I could access https, or ftp, or any other port (e.g.
    http://somesite.com:8080), which means only accessing port 80 becomes
    But as long as I get the VPN connected, I can access everything.
    Once I uninstall the VPN client, it is back to normal.

    Any idea would be appreciated,
    Ross, Mar 26, 2008
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  2. Ross

    Guest Guest

    I don't know any specific problems that fit your description but I can
    think of some things to check.

    Computer may have spyware or a trojan that is attempting to intercept
    all HTTP traffic.

    There may be another VPN or security product installed that is scanning
    HTTP traffic but is incompatible with the Cisco VPN client.

    I don't use Cisco VPN products so I don't know what kind of policies you
    can apply to the client side but it's possible there is a Cisco VPN
    configuration problem somewhere.

    You may have some kind of proxy setting or proxy client installed. You
    may have TCPIP filtering in the advanced settings of your network
    adapter with some filter settings or it may be set with a group policy.
    Guest, Mar 26, 2008
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  3. Ross

    Thrill5 Guest

    The VPN client has a stateful firewall, and there is a setting for "stateful
    firewall always on", uncheck this box.
    Thrill5, Mar 27, 2008
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