Re: DNS funny with Debian

[Greg Wooledge <greg@wooledge.org>]

On Tue, Jul 14, 2026 at 22:14:07 +0100, Joe wrote:
> Also ISP DNS:
> 
> joe@jrenewsid:~$ host 82.195.75.100
> 100.75.195.82.in-addr.arpa is an alias for100.64-26.75.195.82.in-addr.arpa.
> 100.64-26.75.195.82.in-addr.arpa domain name pointer bendel.debian.org.
> 
> Also BIND9:
> 
> joe@piserve1:~ $ host 82.195.75.100
> Host 100.75.195.82.in-addr.arpa not found: 2(SERVFAIL)

hobbit:~$ host 82.195.75.100
;; communications error to 127.0.0.1#53: timed out
100.75.195.82.in-addr.arpa is an alias for 100.64-26.75.195.82.in-addr.arpa.
100.64-26.75.195.82.in-addr.arpa domain name pointer bendel.debian.org.

I should've used "time".  Oh well.  The point is, I got an answer,
after an initial timeout followed by a retry.  I'm using dnscache.

If both you and I are seeing intermittent failures getting the PTR
record pointing to bendel, that points to an issue somewhere in the
DNS infrastructure used by Debian or by (one of?) its providers.

A deeper investigation might be warranted.