topic Re: Cannot port forward on 4GEE Router in Archived Posts

Cannot port forward on 4GEE Router

iVizWiz — Fri, 09 Jul 2021 21:40:58 GMT

Hello, I am having trouble port forwarding on my 4GEE Router, I am using the IP that is in the System settings on the router: 10.XXX.XXX.XXX, I am using IP filter in Security to port forward (I don't know if that is the correct place), I put my IP and Port and whenever I try to connect to the IP with the port, it doesn't connect, I want to let people access my server that I am hosting but they cant join. Any fixes?

Re: Cannot port forward on 4GEE Router

mikeliuk — Fri, 09 Jul 2021 22:27:04 GMT

Hi @iVizWiz ,

IPv4 addresses of the form 10.x.x.x (I assume you are saying this address is on your WAN interface) belong to the private subnet 10.0.0.0/8 and these are not publicly routable on the internet. This is one of the subnets reserved for private local network usage (more commonly, carriers will use 100.x.x.x addresses).

https://en.m.wikipedia.org/wiki/Private_network

To get around this, I read that some users behind CGNAT will use a VPN to get a publicly routable IPv4 address.

Re: Cannot port forward on 4GEE Router

XRaySpeX — Sat, 10 Jul 2021 00:48:50 GMT

The 10.XXX.XXX.XXX IP isn't your public IP but 1 within EE's private DHCP. You are finding yourself up against a limitation of EE's mobile network. The EE mobile network uses Carrier Grade NAT (CGNAT) resulting in a double NAT, which means that you don't get your own public IP address but share it with other users. So you can't be uniquely id'ed on the Net & therefore your LAN cannot be addressed from outside for unsolicited accesses. This is unlike fixed BB.

If this occurs there is nowt you can do to avoid it.