Laptop cannot see vpn ip address

Posted on 2004-11-16
Last Modified: 2010-04-10
Thanks to any that can possible help shed light onto this issue.

New company owned laptop = Dell d600
internal wlan 1350 card
vpn (client 3.6.6a) to Company intranet
home router = netgear mr814
wep (64 bit) enabled
Zone Labs software firewall (mandated by company)

I can connect (wired and wireless) to INTERNET, no problems.  The problems start when trying to start a vpn tunnel -


Can get to the intranet, and it performs as expected only after doing a hard reset on my router (uplugging/repluging).


The laptop simply cannot see the vpn.???.???.??? ip address.  This is true for the vpn client, as well as for "ping" (times out).

Anyone have any ideas?

Question by:jdharris5954
    LVL 41

    Expert Comment

    have you forwarded the VPN ports on the home router?
    LVL 7

    Accepted Solution

    Try lowering the MTU on your router. The added overhead of WEP may be causing fragmentation which IPSec doesn't care for.

    As for having to bounce your router to get the wired VPN working, this makes less sense.

    Try lowering MTU to 1400 or so and see if it helps either.


    Author Comment

    Thank you for your replies.

    Have not done port forwarding because it was working "wired".  Is there something I'm missing?  This is new territory for me.

    If I can figure out how to lower the mtu, I will try that this evening.  

    Again, thanks
    LVL 7

    Expert Comment

    Port forwarding is not necessary as you are initiating from the inside. Just IPSec passthrough is required and since you authenticate on the wired side (sometimes), you know it is enabled.

    LVL 1

    Expert Comment


    * Which vpn client?
    * Can others connect OK without problems?

    Regarding the ping, it may be that your company has set the vpn access point (probably a firewall) to deny pings for security reasons.  

    Some vpn clients (cisco, I know) take over your entire internet connection when running, unless they're configured specifically not to, on the firewall side.  That may be part of what's causing your loss of connectivity once you start the vpn connection.

    Have you tried connecting from someplace else, like a nearby Starbucks?  


    Author Comment

    Thanks again to all.

    itgb:  It is the Cisco client.  As far at the Starbucks thing, doesn't that require a purchased wi-fi connection?  Not that that would stop me, just wanted to know.


    Author Comment

    Thanks so much to all that helped me.  Every post aided in solving my issues.  


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