GRE Protocol Support

Discussion in 'Networking Issues' started by jbarber, Mar 24, 2007.

  1. jbarber

    jbarber Network Guru Member

    I am setting up a MS Small Business Server 2003. I need a router that supports GRE Protocol 47.

    Has anyone used any Linsksys Router for this? If so please let me know the model number.

    I have tried a befsx41 and a wrv54g and neither of them work.
  2. Disman_ca

    Disman_ca Super Moderator Staff Member Member

    Its a good question but I can't seemed to find any info to confirm it has been done. That being said, iptables can forward protocol 47 so it might be possible. For this you would have to get a Linksys router that has 3rd party support (Linux) firware.
  3. ifican

    ifican Network Guru Member

    Any should work if you are using gre as pass-thru from the inside out. If you want to initiate the gre session from the outside in, should be ok if you put the server in the dmz. Several of the 3rd party firmwares support pptp to the router itself. Which direction are you looking to go?
  4. eric_stewart

    eric_stewart Super Moderator Staff Member Member

    This is a known issue with the WRV54G and will never be dealt with according to the duo at Linksys that a few of us ad hoc beta testers deal with directly from time to time.

  5. DocLarge

    DocLarge Super Moderator Staff Member Member

    Concur with Eric. The router's that linksys makes that do support GRE are the following:

    - WRV200
    - WRVS4400N
    - RVS4000
    - RV0xx Series
    - WAG54G (UK/EU ADSL Gateway router)
    - BEFVP41

    I've set up Windows 2003 servers behind both the WRV200 and the WRVS4400N followed by connecting with the microsoft vpn client client from both the 2000/2003 operating systems (server and professional) and it's a strong and reliable connection.

    Not every linksys router supports Protocol 47 (GRE). I've done an extensive list in the past of all the routers I knew of that supported GRE. Alot of us became aware of the NAT-T/GRE issue back when the WRV54G/Quickvpn came on the scene and the ability to connect to vpn servers was not possible behind the WRV54G. At that time, the BEFVP41 was the only router (known of I believe) that was capable of passing GRE; if you loaded sveasoft, dd-wrt, hyperwrt,or sartori on a wrt54g, you could then pass GRE.

    If you need to pass GRE without spending a lot of money on a router and want to stay with linksys, the WRV200 ($75) is the one to go with.

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