I have this modem-router:

  • external IP: x.x.x.x (static)
  • internal IP:

now, I have assigned x.x.x.x as www.mydomain.com, app.mydomain.com and svn.mydomain.com on public DNS.

on the LAN (NAT) I have my server with internal IP The server has apache2 with some virtual host configured that match DNS records.

I mapped a port forward for port 80.

Accessing *.mydomain.com from outside the LAN works good, forward happens and I can see my server.

The problem is when I try to access *.mydomain.com from a LAN client: port forward does not happen and I see the router admin page!

Note that:

  • I cannot a access because of virtual hosts configuration, and however, I like to preserve the same name address for internal and external

  • This piece of junk can only forward to the same port (forward x.x.x.x:8080 to can't be configured...)

  • I haven't found a way to configure DNS records on the router

Any idea?

Maybe putting an internal DNS server will solve?


no it can't be done, just like I said:

  • This piece of junk can only forward to the same port (forward x.x.x.x:8080 to can't be configured...)

virtual server listing

start port and end port are used to define a port range, don't confuse with source port and destination port, in this piece of junk there's no such thing.

  • 1
    Your router needs to support NAT forwarding, which it does not if this isn't working. So yes, an internal DNS server would solve the problem, or updating your local hosts file – Paul Oct 14 '14 at 7:30

Edit your hosts file and add the following: www.mydomain.com app.mydomain.com svn.mydomain.com
  • Thanks, but configuring hosts file on every single client is not doable. I thought there could be a "router trick" for doing this. – Michele Mariotti Oct 14 '14 at 7:35
  • The router is a Wireless Range Extender. Can you configure the upstream router? – DavidPostill Oct 14 '14 at 7:40
  • No, it's not an extender. It's a ADSL2+ modem-router. – Michele Mariotti Oct 14 '14 at 8:00
  • Then please give the rest of the model number as there seem to be different kinds of Sitecom 300N router - does it have a WLXXX number as well? – DavidPostill Oct 14 '14 at 8:08
  • WLM-3500 v2001, firmware 1.07 – Michele Mariotti Oct 14 '14 at 17:48

i setted up my own DNS server on and made the router use and propagate it:


now everything is working fine.

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