FireWall - DNS - (port) forwarding

Support
1

Hi,

how can you make the one computer in the network reachable from the outside, but using an already used port?

My NS logs on to a dynDNS service and is more accessible from outside, I have the following ports free: 80; 443,980,9090 and some more SMTP, etc …
Now I would like to make another computer that is in the local network befeindet reachable from the outside, he should listen to the port 80.
Actually, I use a different port: 8080, which I simply forward internally in the firewall.
Now, however, should no longer be forwarded by port, but by name?

NS = 192.168.20.100 (A_external.domain.com)

Client = 192.168.20.111 (B_external.domain.com)

Both are to listen on the port 80.
Is it possible?
If so, how do you configure the firewall?

Thank you!

LG
Gerald

2

You should have two IP public addresses on RED Interface. So B_External.domain.com can be managed to that port. And can be used “another” port 80.

1 Like
3

Good tip.
But how should this be realized?

4

Port forwarding, the firewall, knows nothing of names. It only works on IP addresses. So if you are directing 2 different domains to the same (red interface) IP, it’s never going to work.

Cheers.