Re: A strange problem with Crazy party and hosting a server
You might be behind two layers of NAT. I used to help people and ran into this same issue. If you have two routers, this can happen as each one has its own firewall and routing table. Even if you forward the port on your primary router, traffic won't come through because the firewall in front of that won't let anything past. Think of it like opening your bedroom door while keeping the front door closed. People outside your house can't get into your bedroom without first going through the front door, so if the front door is closed, nothing is getting through even though your bedroom door is open.
Anyway, do the following to test this. Open a command prompt window, type tracert 8.8.8.8, and press enter. This will try to trace the path between you and Google's DNS servers, listing all devices in between. If you see a second private IP address after your default gateway address, it means you're dealing with double NAT. If you see a public IP address for your ISP, you're fine. Private IP addresses fall into one of three groups. If you see an address starting with 192.168.x.x, 172.16.x.x through 172.31.x.x, or 10.0.0.x, those are all private IP addresses that can't be used on the Internet.
If you're dealing with double NAT, plug the second private IP address into your address bar to access the configuration page of your modem or what ever device is in front of your primary router. You will have to set your primary router in the DMZ which will allow all connections to pass to it. Then simply open the port on your primary router as you normally would and traffic should be able to come in.
If none of that made sense, here's a common situation. You receive a modem from your ISP that also acts as a router and switch. It has its own firewall and allows devices to connect to the Internet. Let's say you go out and purchase a Netgear router and connect it to the equipment your ISP gave you. This is double NAT. You may be trying to change settings on your Netgear router, but it does no good because the firewall from the ISP equipment is still working. As a result, you need to put your Netgear router into the DMZ of your ISP equipment.
This is waaaaay too complicated! Please make a server application soon! It's only making it harder and more frustrating for players to play and have fun. I will gladly host a Crazy Party server on my Linux VPS if and when said application is created.
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