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Which ports do XP's offline files use?

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  • Which ports do XP's offline files use?

    http://support.microsoft.com/kb/307853

    We're going to be setting up offline files for our laptop users to syncronize their files when over the VPN. However the network manager is requesting I provide him with the ports that the sycronisation uses so that he can open up the firewall(s).

    Any ideas?

    Thanks.

  • #2
    Re: Which ports do XP's offline files use?

    Am I totally on the wrong track or does the VPN forward everything, regardless of port, over the VPN tunnel (port 1702 or 1723 depending on type). So what additional ports would need to be open?
    Tom Jones
    MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
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    • #3
      Re: Which ports do XP's offline files use?

      Originally posted by Ossian View Post
      Am I totally on the wrong track or does the VPN forward everything, regardless of port, over the VPN tunnel (port 1702 or 1723 depending on type). So what additional ports would need to be open?
      I think you're right on track. All communication regardless of application, port, or protocol rides inside the VPN tunnel and should be transparent to the firewall.

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      • #4
        Re: Which ports do XP's offline files use?

        I agree with the above two posts - a vpn usually opens everything. However, it's possible the network design allows vpn access into a controlled subnet, and from that subnet, the access to the rest of the network is limited, for instance, no file sharing, but you can RDP to server 1 or server2, or you can use exchange..


        in that instance, I'd suggest that offline file sharing uses standard file sharing suite of ports 135,137,139,445 (some of these may be wrong.. please tell e before nov 1st :P)
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        • #5
          Re: Which ports do XP's offline files use?

          Aye, depends on the VPN endpoint. ISA Server (for example) treats VPN clients as a seperate network from internal, external etc so it depends on what traffic the network rules allow between the server hosting the files and the VPN clients.

          Anyhoo, I think tehcamel is correct in the ports, more specifically it's TCP 139 and 445, and UDP 137 and 138 working on the assumption that Offline Files uses the same ports as standard File and Printer Sharing. But you know what they say about assumption.
          BSc, MCSA: Server 2008, MCSE, MCSA: Messaging, MCTS
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          • #6
            Re: Which ports do XP's offline files use?

            And so does Check Point and Cisco for example.
            Yes, Everything might be thrown into the VPN tunnel, however it is still possible to setup other Access-lists, firewall rules or whatever you call it on the tunnels.
            So it isn't a weird question to ask about the ports needed.
            Marcel
            Technical Consultant
            Netherlands
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            MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
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