Accessing DSL modem Through WRT54G

Have a question or want to start a discussion? Post it! No Registration Necessary.  Now with pictures!

Threaded View
Why can't I access my Siemens Speedstream 4100B DSL modem through my
wired WRT54G when the DSL modem is offline?  I can't access the modem
until it gets a public IP and tells the router about it.

Shouldn't the WRT54G (192.168.1.1) at least know the route to the
modem (192.168.0.1) regardless of the internet connection?

Works fine if I disconnect the router and wire the computer right to
the modem.

-sw

Re: Accessing DSL modem Through WRT54G
wrote:

Quoted text here. Click to load it

No.  Anything that is NOT directed to 192.168.1.xxx goes to the
default gateway at the ISP including 192.168.0.1.  Since the ISP
gateway has no clue where to send packets destined to 192.168.0.1.
Therefore nothing goes through.  

I've also tried setting up a static route in the router to the DSL
modem, but that also didn't work.

However, some routers break the rules and automatically setup a static
route to the connected modem.  

Other routers, like DD-WRT, allow for a static router to the modem:
<http://www.dd-wrt.com/wiki/index.php/Access_To_Modem_Configuration
(Replace the 10.0.0.2 with 192.168.0.2 if the DSL modem is
192.168.0.1)

Quoted text here. Click to load it

Incidentally, the Speedstream 4100 is in my never humble opinion, a
goo DSL modem.

--  
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

Re: Accessing DSL modem Through WRT54G
: Why can't I access my Siemens Speedstream 4100B DSL modem through my
: wired WRT54G when the DSL modem is offline?  I can't access the modem
: until it gets a public IP and tells the router about it.

: Shouldn't the WRT54G (192.168.1.1) at least know the route to the
: modem (192.168.0.1) regardless of the internet connection?

: Works fine if I disconnect the router and wire the computer right to
: the modem.

Try placing your WRT54G on the same Sub-Net as your DSL Modem
(192.168.0.X), where a Standard Choice would be 192.168.0.254.
Remove 192.168.0.1 from the WRT54G's DHCP Server's Dynamic DHCP
Range.  Then you should be able to see the DSL Modem while it
is Off-line, plus is would mean one less level of NAT!

Lawrence Houston  --  (houston@greenfield.dyndns.org)

Site Timeline