Re: Windows Messenger over VPN thru ISA Server

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m_at_xp
Date: 12/27/04

  • Next message: Sergio Fonseca [MVP]: "Re: Windows Messenger over VPN thru ISA Server" 
    Date: Mon, 27 Dec 2004 08:41:00 +0100

    Hi Sergio,

    I've already tried but it didn't worked.
    Anyway I've found (but not solved) the reason. By sniffing the network I
    found that when Windows Messenger is started it query (DNS) the record
    _rvp._tcp.<mydomain> but instead of sending the queries to the DNS on the
    VPN, it send the queries on the VPN on the LAN that, when the VPN is
    established, are obviously unreachable.
    In this way, Windows Messenger continues retrying that query and look as
    "hung". No way, nor timeout, to escape that conditions.
    Note that the sequence of adapters is correct (VPN before the LAN adapter)
    and a normal query issued via nslookup at the DOS prompt are sent to the DNS
    on the VPN.
    Any other hints?
    Thanks

    "Sergio Fonseca [MVP]" <fonsecase@iol.pt> wrote in message
    news:%23hQ51Tr6EHA.2568@TK2MSFTNGP10.phx.gbl...
    > Hi,
    >
    > Turn off the Cisco client "stateful firewall".
    >
    > Qualquer sugestão deve ser testada antes de aplicada - www.gupade.org
    >
    > "m@xp" <me@maxp.it> wrote in message
    > news:u7Wu35$5EHA.3820@TK2MSFTNGP11.phx.gbl...
    >> Hi,
    >> I have a very strange problem using Windows Messenger with Exchange IM
    >> Messaging over a VPN thru our ISA Server (2000).
    >> The VPN is established using a software Cisco VPN client (v4.6) and it
    > works
    >> fine for all application and services except for Windows Messenger: it
    > seems
    >> that it connect correctly with the IM server on the other side of the VPN
    >> but when building the contact list the application hangs. Please note
    >> that
    >> if I run the VPN directly on the internet bypassing the ISA server
    >> Windows
    >> Messenger works correctly.
    >> Note that on the ISA server I've set the Protocols Definitions (and
    > Protocol
    >> Rules) and the IP Packet Filters for UDP ports 500, 1701, 4500 and 10000
    >> (required by IPSec).
    >> Any hint?
    >> Thanks in advance.
    >> Ciao
    >>
    >>
    >
    >

  • Next message: Sergio Fonseca [MVP]: "Re: Windows Messenger over VPN thru ISA Server"

    Relevant Pages

    • Re: Windows Messenger over VPN thru ISA Server
      ... Turn off the Cisco client "stateful firewall". ... > I have a very strange problem using Windows Messenger with Exchange IM ... > Messaging over a VPN thru our ISA Server. ... > if I run the VPN directly on the internet bypassing the ISA server Windows ...
      (microsoft.public.isaserver)
    • Windows Messenger over VPN thru ISA Server
      ... I have a very strange problem using Windows Messenger with Exchange IM ... Messaging over a VPN thru our ISA Server. ... Note that on the ISA server I've set the Protocols Definitions (and Protocol ...
      (microsoft.public.isaserver)
    • Re: Unable to resolve Names when VPNed
      ... But when I'm at home and I VPN I'm unable to ping them. ... Check ipconfig /all when in the VPN to see where the DNS queries are going. ... Then check the rules on the ISA server to ensure that VPN clients can send ...
      (microsoft.public.isa.vpn)
    • VPN geht nicht mehr - nach DNS Server auf neuer Hardware
      ... Der neue DNS Server ist auch wieder aktiv Direc. ... Leider kann man sich seither nicht mehr mit VPN am ISA Server einloggen. ...
      (microsoft.public.de.german.isaserver)
    • Re: Explorer unresponsive when port 445 is blocked from client
      ... To clarify, yes, the AD dns server is visible to the world. ... I'm using ISP-assigned DNS servers; my AD domain is also my Internet ... using VPN connections to tunnel. ... the domain controllers. ...
      (microsoft.public.win2000.active_directory)