Internet Network Service for server running

[amado]

Hi all
I have a server that's running in internet network service A. My friends are using internet network service B and C, they can connect my server; Other friends are using service A, they can't connect.
I have changed my internet network A to B (I have 2 services network at home); now, I'm using network B. My friends are using internet network server A and C, they can connect my server! But, my friends are using internet service B, they can't connect!
When using internet network server C, my friends can connect both OK.
That problem is: Can't connect with the internet network service which like the service used for Server.
Please help me asap!

Thanks for reading

[macdonald12]

Confusing post

Are the people that can connect on an internal network or something? Logically it would be a router / port configuration problem. Or maybe your ISP is blocking the port, but then nobody would be able to connect.

[jurchiks]

internal IP wrong?

[Lee]

Its called Local playing. The guys from your ISP must use your internal IP to play, otherwise they can't connect.

[lishawj]

Its called Local playing. The guys from your ISP must use your internal IP to play, otherwise they can't connect.

That is not entirely true. My server accepts clients running locally on the same LAN segments using private internal IP address and clients from that segment that goes out to the WAN IP address. The key here is proper "port forwarding" settings on your firewall.

[denser]

use hamachi if you have some problems with segments.