Weird DNS proxy issue on ECI Bfocus modem?

[Hetz Ben Hamo]

Ori,
Since you can't replace or diagnose parts of the board, my simple
suggestion would be to replace the router (if I'm not mistaken, it
won't cost you). That way you'll get a new modem with newer firmware.

Hetz

On Sun, Feb 22, 2009 at 1:40 PM, Ori Berger <linux-il at orib.net> wrote:
>
> The DNS proxy on my ECI ADSL modem ran flawlessly for years, but recently, every few days it will abort with a segmentation fault. (I've been away for a few months, so I don't know exactly when it started -- later than October, earlier than February).
>
> Restarting it (by running "/sbin/dproxy -c /etc/dproxy.conf"), solves the problem, and there are no other visible problems.
>
> A hardware failure is possible but unlikely, given that it's all solid state (flash + ram) that has been doing the same thing for years.
>
> Another thing I suspect is bad, possibly malicious, DNS packets that make the proxy die. It's an old 2.4.17 MontaVista kernel, but I don't even know what version of dproxy.
>
> I found <http://www.securityfocus.com/bid/23243/exploit> but the dproxy is not listening for requests from the world, and thus (assuming my own machine is not a zombie -- I'm optimistic!) if it is indeed relevant, then it's possible some upstream DNS servers are not playing nice.
>
> Does anyone have a suggestion what I should be looking for, or to which firmware version should I update my modem?
>
> Thanks,
> Ori.
>
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--
Skepticism is the lazy person's default position.
my blog (hebrew): http://benhamo.org