[buug] "Easy" integrated DSL modem/router (not!)

[Windsor Schmidt]

Hi, my name is Windsor. I've been a lurker on the list for a while, but
since I happen to have the same router as Ian (2700HG-B), I thought I'd
post.

I've noticed the same behavior of machines not appearing on it's list to be
able to configure port-forwarding with them as a target, though luckily my
Linux server is on it's list. Because it worked for me I didn't bother
exploring the situation, but I considered a few possibilities why my server
does show up in it's list:

1. It's because the server is connected via wireless (different discovery
method on the router perhaps runs through a different code path?).
2. It's because of some service that is running on the server (dscovery
method not complete with a simple ARP reply from server).
3. It's because of some networking service/tool/client I've used on the
server that triggers the router (because of it's having to perform NAT on my
server's behalf).

Ian, if there's anything in particular about my setup that I can double
check with you, I'd be happy to help try and troubleshoot. FWIW, my Linux
server is Debian Lenny on i686 hardware, and I use a Linksys WMP54G wireless
NIC.

-Windsor


On Fri, Mar 27, 2009 at 1:59 AM, Ian Zimmerman <itz at buug.org> wrote:

>
> I just posted the following on linuxquestions.org, referring to the
> 2wire 2700HG-B that came with my roommate's AT&T DSL.
>
> Ian> these routers are junk :(
>
> Ian> I am struggling with one as well. I am no beginner, I am an
> Ian> experienced Unix & Linux sysadmin. The problem is simply that some
> Ian> computers don't show up on the router's list, so there's no way to
> Ian> set up NAT for them because the setting is not by IP address but by
> Ian> the name on the list. The list is somehow dynamically discovered by
> Ian> the router, and I have no clue what it is my Linux box has to do to
> Ian> be noticed. Maybe something to do with SNMP? Or NetBIOS? I did a
> Ian> tcpdump on the Linux box and I see the router continually sends ARP
> Ian> requests, 1 per second. When my box receives one of these it
> Ian> replies properly with its MAC address, so that makes it even
> Ian> weirder that it's not included in the list.
>
> Ian> If anyone has figured out how to make this piece of *@%# behave,
> Ian> please help.
>
> --
> Ian Zimmerman <itz at buug.org>
> gpg public key: 1024D/C6FF61AD
> fingerprint: 66DC D68F 5C1B 4D71 2EE5  BD03 8A00 786C C6FF 61AD
> Ham is for reading, not for eating.
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