modem setup for direct ip connectivity

Posted on 2004-11-17
Last Modified: 2013-11-30

im trying to connect to vnc listening pc over dsl network to another isp

both machines got xp sp2,  ive disabled upnp and forwarded the ports vnc needs..

but again   while im home,, i cannot ping that pc,

what setting causes this..

why can i not ping that pc....

i guess when i can ping i can start using vnc...

pls help, this question is worth 500 points to me.. i cannot figure it out.

thanks for youre help


Question by:mokum95
    LVL 95

    Assisted Solution

    by:Lee W, MVP
    Have you disabled the Firewall in Windows XP?  SP 2 automatically enabled it.
    LVL 5

    Accepted Solution

    What is the IP you are trying to ping? (is it private or public?) - post it here.

    You are saying forwarded? - meaning that you are using a router? firewall? - probably ICMP is closed on it.
    ICMP (ping) may not work, but VNC can, so just try to check the connectivity with the VNC client or try:

    telnet <ip> <port>


    telnet 5900

    LVL 2

    Assisted Solution

    Have you set the sp2 firewall to allow VNc as an exception?
    LVL 5

    Assisted Solution

    by:Rok Brnot
    How is  other PC connected to internet , are ther any firewalls in beetwen?

    Author Comment

    wow what a fast reply !!

    yes firewall is enabled, and vnc is setup as a exception on it..  

    i dont know if the ip is private of public,, sorry for being a network noob....

    icmp is closed ? k thanks that could be why i cannot ping it..   ll look that one up..  i guess thats setup in the modem/router .. its a speedtouch 510

    ive tried to

    telnet 5900

    again no reply..

    thanks for youre input i really appreciate it..

    what do you recommend i should check


    what do you recommend


    Author Comment

    it was the firewall in the modem itself.....

    ty ,  i learned something today

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