Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have two devices to establish my home network and internet connection:

  • A Sitecom DC-227 ADSL Modem + Router (Modem)
  • A Sitecom Router + Switch (Router)

Currently I've set it up using double routing and NAT. Between the modem and the router there is a network in the range, and the real LAN behind the router is in the range.

This works fine for regular internetting. However, I want to run some servers in the 192.x network, and I can't forward external ports correctly from the modem. I've set it up in its config panel, but it doesn't appear to work. This may be because it's a feature called "virtual servers", while the router has "real" port forwarding.

So I'd rather set up the modem to just bridge between ADSL/Ethernet, and have the router as the only router. How do I set this up? I tried setting the modem to "1483 Bridged" mode and set PPPoE on the router, but that didn't work. I don't know if I got all the details right though.

My current settings are: Modem:

  • Protocol: PPPoA
  • VPI/VCI: 8/48
  • Encapsulation: VC MUX
  • Username: kpn@direct-adsl
  • Password: kpn (it's the same for everyone)
  • Own IP:


  • WAN side: static IP
  • LAN side: IP, DHCP server for 192.x
share|improve this question
up vote 0 down vote accepted

The easiest thing to do is take your second device - the one you are now using as a router - and just use it as a switch.

Take the Ethernet from the modem and instead of plugging into the WAN port on the second device, plug it into a switch port. This eliminates the intermediary network and the modem will be the NAT router serving 192.x (or its default 10.x, doesn't matter). It looks like the DC-227 has decent standard features - firewall, QoS and, most importantly for your needs, DMZ and port forwarding.

share|improve this answer
I know that trick, but the port forwarding on the DC-227 doesn't work. It doesn't matter, we switched out both devices for a single Linksys modem+router. – Bart van Heukelom Apr 21 '11 at 23:09
That's a fine solution. – JCotton Apr 21 '11 at 23:53

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .