Internet NAS access via DD-WRT router setup w/no-ip DDNS behind a Netgear DSL modem/router.

Greetings all: Requesting some expertise with a home lan setup.

I have AT&T DSL service connected to a Netgear DGN2200 (ADSL Wifi Router w/4 10/100 LAN ports). 1 of the LAN ports of this router is tied to the WAN port on a Linksys WRT54GS V.3 Firmware: DD-WRT v24-sp2 (08/07/10) mega, which is what I use for wireless for all devices at home. (So I'm really just using the DGN2200 as a DSL modem...)

I recently added a QNAP TS-421 NAS. Because I want to utilize the gigabit port on the NAS, I purchased a Cisco gigabit switch so that wired connections on the switch can transfer huge files quickly. 1 Port on the gigabit switch is tied to a Linksys LAN port.

Internal NAS access and wireless Internet access is all working fine. Now, I'm trying to access the NAS from remote...

So, I have setup a no-ip account and added a domain. I entered the login details on the Linksys router under Setup->DDNS and notice that the DDNS status is updating everyday.

The problem I have is that when I enter the no-ip domain name to access my LAN from remote, I am prompted for the user name & password of the Netgear DGN2200 (the first device tied to my DSL service.) Upon authentication, I'm logged in to the Netgear router's admin page from remote. However, I'm trying to reach the NAS instead.

Netgear DGN2200's IP is
LinkSys WRT54GS's IP is

I'm guessing I need to forward a port on the Netgear DGN2200 to - but everytime I try I get an error: "Server IP address must be a LAN IP address."

Any clues on what I'm doing wrong here? Thank you in advance for your help.
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  1. Best answer
    what I would do is either configure the Netgear to run in bridge mode (modem only) and have the Linksys be your router, or configure the Linksys to work as an AP only and have the Netgear do the routing.

    having two routers daisy-chained will make it hard to access the NAS remotely.
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