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Pinpointing a port block

  • 13-04-2005 6:53pm
    #1
    Evac101
    Registered Users, Registered Users 2 Posts: 689 ✭✭✭


    Anyone know of a method (from a Windows XP SP1 comp) of pinpointing at what point in you net connection a port block is being initiated?

    Thanks:)


Comments

  • #2
    Cryos
    Registered Users, Registered Users 2 Posts: 816 ✭✭✭Cryos


    not entirely sure what your looking for here

    but if you open command prompt (by going to run and then typing CMD) then type netstat, it will show you currently whats useing which port.


  • #3
    Captain Trips
    Closed Accounts Posts: 944 ✭✭✭Captain Trips


    Evac101 wrote:
    Anyone know of a method (from a Windows XP SP1 comp) of pinpointing at what point in you net connection a port block is being initiated?

    Thanks:)

    Are you wondering is your ISP blocking your bittorrent ports?


  • #4
    Evac101
    Registered Users, Registered Users 2 Posts: 689 ✭✭✭Evac101


    Heh, not quite Trips:)

    A friend in Wales using NTL was able to access a MUD she's an IMP on up until yesterday. The MUD uses port 1234. When she contacted the ISP to say that she couldn't connect to anything over telnet which used 1234 (she tested) the help staff told her that they hadn't implemented any port blocks, it must be her machine and if she didn't like it to switch ISP. Apparently he really was that untackful. However, what I would like to do is to be able to test at what point between her and her game server her telnet request is being blocked. Tested using other port numbers without any problems btw:)

    Evac.

    PS The funniest part of this was when tech support informed her that she must be using IE functionality to connect as 'telnet can only use port 110 darlin' ' . Conflicts with my experience using VAX in the early ninties that one :P


  • #5
    Captain Trips
    Closed Accounts Posts: 944 ✭✭✭Captain Trips


    Evac101 wrote:
    Heh, not quite Trips:)

    A friend in Wales using NTL was able to access a MUD she's an IMP on up until yesterday. The MUD uses port 1234. When she contacted the ISP to say that she couldn't connect to anything over telnet which used 1234 (she tested) the help staff told her that they hadn't implemented any port blocks, it must be her machine and if she didn't like it to switch ISP. Apparently he really was that untackful. However, what I would like to do is to be able to test at what point between her and her game server her telnet request is being blocked. Tested using other port numbers without any problems btw:)

    Evac.

    PS The funniest part of this was when tech support informed her that she must be using IE functionality to connect as 'telnet can only use port 110 darlin' ' . Conflicts with my experience using VAX in the early ninties that one :P

    I suppose the first thing is to make sure there is no firewall on at all.

    It's weird that access was fine until say the day before. Have a look at some of the online port scanners such as Sheilds Up to see if she is in stealth mode and as such ports wouldn't be active or responding to the game server. I don't think there is a way to see where - as in which if any server - is prot blocking.

    You could do traceroute to check the IP and make sure that is all good.

    Are you any good with nmap? Having a look at her machine from the outside might help. Veyr limited options without pretending you are the game server and trying to access the machine ......


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