Monday, 9 August 2010

If only Virgin Media were competent...

Is it too much to ask for a broadband supplier to get forward and reverse DNS registrations for their own addresses right?

$ who
jw35 pts/0 2010-08-09 19:32 (
$ dig +short -x
$ dig +short

Result: OpenSSH restriction based on hostname fails because the client hostname can't be established and I waste an hour trying to debug the problem.

Actually it's worse than that:

$ dig +short -x
$ dig +short


Update 2010-08-10: It looks as if the problem may be resolving. The authoritative name servers for (ns[1,2,3,4] seem to be serving consistent results:

$ dig +short +norecurse -x
$ dig +short +norecurse

Unfortunately they serve this information with 7 day TTLs and it's going to be several more days before the bogus information if finally purged from DNS server caches.