TCP connection on APN "unrestricted"

[JacoV]

Hi There,

I want to transfer a file from one PC (connected to the "unrestricted" APN) to another PC (also connected to the "unrestricted" APN). I have written a small app in C++ using Winsock to create a TCP server and a TCP client. When connecting using a small Ethernet LAN, everything seems to work. However, when I try to send the file using Vodacom's network (with the "unrestricted" APN) I run into problems.

It still seems to me that some of the TCP packets are blocked on the network. (I have captured/sniffed the packets with Ethereal on both PCs).

If I use UDP, everything works fine.

Any suggestions will be greatly appreciated
Jaco

 

[Mier]

Have you tried to FTP a file between the two PCs ? I've done this before and it worked fine. (Server on "unrestricted", client on "internet").

Which port numbers are you using for your app ? Avoid standard ports such as 80 or 8080.

 

[JacoV]

Thank you for your help. For some reason I decided to use port 8080 on TCP. This caused most of my problems. Things are working fine now.

Thanks again,
Jaco