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C&C Red Alert 3 (Ultimate Collection; Steam)

#connection issues

Best Answer astra1993, 30 April 2025 - 11:33 AM

Hello. This can be caused by a multitude of issues, such as your ISP blocking some of the game's connections, being behind a carrier-grade NAT, or specifically in the case Red Alert 3, two people sharing the same network to play online. If two people are trying to get online on the same network, one of them must use a VPN. Now the common troubleshooting steps for causes of connection failure are:

  1. Restrictive Firewall: You have to check whether your Windows Firewall is blocking the connection, and also check inside your router/modem settings to make sure that the modem firewall is not set to a restrictive mode (being active is ok; restrictive mode is usually a slider or a drop-down menu setting that can be set from low to high, and being on high would block some of the game's connections).
  2. If there seems to be no problems with the firewalls, you must use your modem settings to forward the port range of 6500 to 65535 of the UDP protocol to your computer.
  3. If port forwarding didn't seem to work, temporarily DMZ your computer inside your modem settings.
  4. if both of the above failed, test with a VPN. But it's important to note that not all VPNs work correctly, because many of them does not allow NAT. You can give Privado a try, which has been tested previously by our staff. A guide is available here.
  5. If everything is still failing, this is most likely an issue with your ISP. You'd have to contact them to resolve the issue.
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#1 Mysterie15

Mysterie15
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  • 1 posts

Posted 29 April 2025 - 10:57 AM

Hello,

I have been having troubles joining/hosting the game. Every time I would try to host a game it would say "New game settings failed" and every time I tried to join a host it would say "Host has disconnected" or something like that.

Also here are the results of the Diagnostic Connection tool:
===========
  FAILURE
===========
Failed to receive any pings from nntest.cnc-online.net:40000.
It appears your router and/or connection is not capable of NAT negotiation.
==> You will need to use port forwarding and possibly configure a static port.

and I have no idea what any of this means. I previously had connections issues with this game when I first started using C&C online and it got fixed ONCE where I and my brother were trying to play Coop and he shared his VPN with me but that doesn't seem to work either now. I have no idea what to do or how to fix this since it never worked from the beginning. I also tried turning Firewall off and on but that didn't do anything either.

 



#2 astra1993

astra1993
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  • 229 posts

Posted 30 April 2025 - 11:33 AM   Best Answer

Hello. This can be caused by a multitude of issues, such as your ISP blocking some of the game's connections, being behind a carrier-grade NAT, or specifically in the case Red Alert 3, two people sharing the same network to play online. If two people are trying to get online on the same network, one of them must use a VPN. Now the common troubleshooting steps for causes of connection failure are:

  1. Restrictive Firewall: You have to check whether your Windows Firewall is blocking the connection, and also check inside your router/modem settings to make sure that the modem firewall is not set to a restrictive mode (being active is ok; restrictive mode is usually a slider or a drop-down menu setting that can be set from low to high, and being on high would block some of the game's connections).
  2. If there seems to be no problems with the firewalls, you must use your modem settings to forward the port range of 6500 to 65535 of the UDP protocol to your computer.
  3. If port forwarding didn't seem to work, temporarily DMZ your computer inside your modem settings.
  4. if both of the above failed, test with a VPN. But it's important to note that not all VPNs work correctly, because many of them does not allow NAT. You can give Privado a try, which has been tested previously by our staff. A guide is available here.
  5. If everything is still failing, this is most likely an issue with your ISP. You'd have to contact them to resolve the issue.

Edited by astra1993, 30 April 2025 - 11:35 AM.





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