lame servers

[Alexander Clouter]

Hi,

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?

Cheers

Alex

-- 
Alexander Clouter
.sigmonster says: marriage, n.:
                  	Convertible bonds.