From green to webserver in DMZ over red

my webserver is running in orange. This can be reached via red and works perfectly via port forwarding for 80 and 443. In orange, the webserver has the IP For this I have set up a ddns for my address

so far so good.

but if I want to access from a client in green, it fails with “timeout”. I can reach the server directly via

can someone help me?


Check your client DNS configuration

DNS configuration is ok. dns resolves to the correct ip address. but with tracert it shows only one line with the gateway IP of green. and the next lines remain empty.

"Routenverfolgung zu []
über maximal 30 Hops:

1 1 ms <1 ms <1 ms
2 * * * timeout
3 * * * timeout.
4 * * * timeout
5 * ^C"

Did you open the DNS to the green zone in the firewall?

I do not understand. how do you mean?

Enter your and i guess dyndns name.