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stealthsilent1

Does demo multiplayer work?

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Control if the IP is correct.

If you're good, test to open the ports used in the router.

Or if you (want) have already installed VPN programs as hamachi o tunngle, test with them.

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No steps. Possibility.

From Manual:

"Note that CMx2 lists ALL the IP addresses assigned to a system. If you have multiple modems or network cards, it will list all IP addresses associated with those devices. What it can’t do is tell you which one is the correct IP address, because that depends on how your system is configured. If you do not know the correct IP address yourself, your opponent will have to try all of them to find the correct one. Make a note of its place in the list, because even"

"If either player is behind a firewall (hacker protection) or is using a proxy system, you may need to reconfigure your system by manually opening the necessary port for incoming and outgoing transmissions. You might have to uninstall some firewalls completely (software-based) or disable them (hardware-based). Some firewalls might have to be uninstalled completely. Users with routers need to add the TCP port to the routers forwarding table and match it to the internal IP address of the computer that hosts the game, then use the router’s control panel to get the external IP address given out by your ISP. This external IP address is what your opponent will need in order to connect to you as host."

"Note: Combat Mission uses the UDP and TCP port 7023 for all multiplayer games. If you are trying to HOST a TCP-IP game make sure and open port 7023 for both UDP and TCP traffic"

 

 

if the IP address itself might change, the order in which the IPs are listed should not.

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Most computers are going to have only ONE IP address, but there is a possibility of multiple network devices (wireless and wired network controllers) that might have more than one IP address, especially if they are pre-assigned/fixed IP addresses. To make this a bit more complex, your opponent will need to connect to the IP address of your router (which will NOT be in the form of 192.168.x.x or 10.x.x.x). You will need to tell your opponent the 'external/internet facing' IP address of the router (this is the IP address the rest of the world sees of your network). CM games typically will NOT get this address, since they really can't see it. So CM might say to provide an address of '192.168.0.4' to your opponent, but that would NOT work. Instead you would need to find that 'external' IP address that the router gets from your internet provider.

Both computer and router (network firewall) will need to be configured to allow the TCP and UDP Port 7023 to go through (incoming and outgoing). Usually outgoing isn't a problem, though sometimes a security program will need to have a permission set for CM to communicate out-bound. Incoming is usually a definite problem and Windows Firewall or a security program will need to have a permission set to allow those TCP and UDP ports to come through. A router (if it has a built-in firewall) will also need to 'port forward' and traffic on TCP and UDP Port 7023 to your computer's IP address (or the entire network). This allows traffic from your opponent that is 'aimed' at your external network IP address to be forwarded to any computers on that network (or a specific computer/IP address).

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