Sonic Wall 2040 Pro VPN issue

Posted on 2006-03-23
Last Modified: 2010-03-19

I am able to connect to our office thru VPN but for some reason internet connection is lost.  As soon as I disable the vpn connection internet connection is back.  Is there anything I should check?  Please advise.

Question by:barokrok2003
    LVL 2

    Expert Comment

    Hmmm... Well, could be because of a number of reasons... Especially at times, configuration issues / or the box acting wierd itself.
    Having worked for SonicWALL as a Support Engineer myself, think can help you here. But I would need you to explain the network
    setup in detail as to how the whole thing is setup in office, and then where are you connecting from, and then what type of VPN is
    being created, whether a SITE-to-SITE or CLIENT-to-SITE. What kind of Internet Media is being used at both ends. Which end are
    you getting the problem on etc etc. What would help even further is if you could export the PREF's file as its called, which you can
    find under settings, Export Button, that would help me further in resolving this, but thats completely up to you...

    Author Comment

    I'm connecting from CLIENT-to-SITE, at home, i'm on DSL and my office is on Full T1.  I'm getting the
    problem when I'm connecting to vpn from home.  Once I disable my vpn connection, internet works - thru my dsl connection.  But when re-connect vpn again, internet connection is lost although I'm still virtually connected and can access my office network resources such as servers, etc - just no internet connectivity.
    LVL 2

    Expert Comment

    When you are connect with the vpn, were you able to ping by host name? What are the dns servers you have once you are connected?

    Author Comment

    - while connected to vpn, i'm unable to ping using hostname, but can ping ip addresses and hostnames that has hosts file entries.  
    - when connected to both, i get the same dns server addresses, since both networks are using the same internet service provider.
    LVL 2

    Accepted Solution

    Hmmm... I believe, this could be a configuration issue... Check at the PRO 2040 VPN Concentrator. There is an option in the VPN
    Configuration, that says use this as the default route for internet, or something similar. I'll have to look it up, but right from the
    top of my mind, if this option is selected at the PRO 2040, when you establish the VPN tunnel, SonicWALL routes all traffic from
    your PC to the tunnel, which is why this could be happening.

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