lame servers

[Alexander Clouter]

Hi,

* Alexander Clouter <alex at digriz.org.uk> [2009-01-05 13:22:20+0000]:
>
> The postmaster at work pestered me, the hostmaster, why
> some DNS lookups were failing (some 1500 a day) that were
> preventing people from sending mail to particular domains.
>
> Digging around on a particular offender (MX lookup for
> wjh.harvard.edu) I found that there is a lame server entry
> which causes MaraDNS to respond with a SERVFAIL to the user.
>
> Now I understand the real fix is to get medieval on the
> hostmaster's out there with borked zone files however could
> someone explain what dangers I have added (cache poisoning?)
> with the attached patch which seems to work around the issue?
>
...and this time with the patch[1] :-/

Cheers

Alex

[1] http://stuff.digriz.org.uk/maradns-lame-server-fix.diff

-- 
Alexander Clouter
.sigmonster says: Overload -- core meltdown sequence initiated.