I have a QNX computer that I am able to reach trough QNET, ie, the /net path is available from a different QNX computer.
 The computer in question is able to access the Internet, and dhcp has assigned an ip. Running traceroute from a remote 
computer however, does not yield a response, and I am unable to to connect to the computer through TCP/IP with developed
 software.

What could cause this behavior? I have 3 computers, 2 QNX machines and 1 Windows machine connected through via a network
 switch, and there is no firewall between them. Pointers to where to start looking would be greatly appreciated.