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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