Hi,
thanks for your answer.
The DMZ is visible and accessible from the Green zone, but not from the Internet, and i'd like that the DMZ can be visible from the Internet.
As you said it just seems to be a problem of specific rooting policies or port settings, but i don't understand why the parameters i have done don't work.
I juste want to be able to do : INTERNET -> Firewall -> 192.168.6.4:80 and 192.168.6.4:80 -> Firewall -> Internet
If you try this today, you get a blank page with an error message "site is not found" (something like that) in your navigator.
For the number of host, it's the former network administrator who have done this. I'm am in the society since one year only. Today we juste have 472 Users in our local network. There are a lot of production machine (my society build glasses) and just 190 "true users" on computers.
Make sure you have this set up
Under Firewall>Port Routing/Destination NAT
# Incoming IP Service Policy Translate to Remark
1 "UPLINK ANY" HTTP/80 (Green Arrow) 192.168.6.4:80 Web Server
^^^^
Means Allow
This should allow incoming traffic to access your server.
I am using exact settings to allow me to remote into my server through endian from outside the site, and it works with no problem.
Aslo you don't need to set anything under incoming routed traffic, port forwarding should be more then enough.
If you can also take a screen shot your port routing in case it doesn't work so I can see every setting you have on it.
As to your DHCP settings on your subnet, you say that you have 472 users and only 192 true users, if by users you mean PC's, then yes your subnet is way overrated for such a small network, you have a scope that allows over 8000 leases available. I think you can take that down to a /23 or /22 subnet, just to keep things a bit nicer when it comes to your DHCP server.
And last, Am probably sure that you have, but you should have a static IP if you want to host that site to the public unless you will be using DDNS, and have it registered under a public/root DNS server.
Internal DNS settings can also be configured under Proxy>DNS>DNS routing! (this is to allow users within your network to just type the address of the page on browser in order to reach it)
Again, am sure you have that done.. but just in case
Let me know how it goes.