www server question

[John Heryer]

On Fri, 28 Sep 2001, Brian Densmore wrote:
> Sep 16 04:02:20 dunsmuir sendmail[25788]: gethostbyaddr(172.21.12.130)
> failed: 1
>
> What is the cause of this? I believe I have the DNS set up as a
> non-authoritative caching name server, with the local domains listed and
> it then points to the ISP DNS. This box is sitting on a LAN outside my
> ISP's firewall.
>

>From the looks of it there is a DNS problem. Sendmail spits that error out
because is uses gethostbyaddr() to do a hostname lookup on an address and
fails. If I am reading the error message correctly, the 'failed: 1' is
telling you that gethostbyaddr() has returned a HOST_NOT_FOUND error.
Specifically, I think the HOST_NOT_FOUND error results from an
'authoritvive answer host not found' error. So maybe sendmail does not
like that you are using a non-authoritive caching nameserver. Or maybe I
am completely wrong.

-- 
John Heryer
jheryer at jayhawks.net