Re: Some servvices on my edge box slow to reply
From: clvrmnky (clvrmnky-uunet_at_coldmail.com.invalid)
Date: 09/22/04
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Date: Tue, 21 Sep 2004 18:38:51 -0400
On 21/09/2004 5:38 PM, Dave Uhring wrote:
> On Tue, 21 Sep 2004 16:47:32 -0400, clvrmnky wrote:
>
>
>>[...]
>>clvrmnky@martini:~ # time nslookup 10.0.0.10
>>Server: localhost
>>Address: 127.0.0.1
>>
>>*** localhost can't find 10.0.0.10: Server failed
>>
>>real 1m11.335s
>>user 0m0.000s
>>sys 0m0.016s
>>clvrmnky@martini:~ #
>>clvrmnky@martini:~ # time host -a -v 10.0.0.10
>>Query about 10.0.0.10 for record types ANY
>>Finding reverse mapping for 10.0.0.10 ...
>>Nameserver not responding
>>10.0.0.10 ANY record not found, try again
>
>
> If you are going to use DHCP for your hosts on your LAN and expect things
> like ssh and ftp to work without delay then you really need to configure
> dynamic DNS on the nameserver. It is not difficult to accomplish and if
> you need a usable template, email me and I'll send you my /etc/dhcpd.conf
> and /var/named/etc/named.conf files.
>
Ok. The problem is that this has worked a treat until today. I've had
the same setup for years. I guess the lookups have just failed in a
timely manner until now, but I'd like to know /why/. And why only on
some virtual Apache instances? Why IMAP all of a sudden?
>
>>real 0m48.151s
>>user 0m0.031s
>>sys 0m0.008s
>>clvrmnky@martini:~ #
>>clvrmnky@martini:~ # time nslookup 10.0.0.254
>>Server: localhost
>>Address: 127.0.0.1
>>
>>*** localhost can't find 10.0.0.254: Server failed
>
>
> If martini's IP address is .254 you have some serious problems in your
> zone records. Do you even have an inverse lookup record file?
>
Really? What else would it be? 10.0.0.254 is a valid static address
within 10.0.0 that I've given to the internal NIC. The resolver knows
about it via /etc/hosts. I've never needed to do a reverse lookup on it
before.
I have a caching-only nameserver, so I've done nothing extra other than
enabling that. I did the bare necessities out of the O'Reilly TCP/IP
book and the OBSD FAQs to get a cashing nameserver working, and have
never touched it since then.
> You might consider upgrading your installation to 3.5 since your version
> is no longer being supported with patches. In addition 3.5 has
> BIND-9.2.3, which has fewer bugs and is more secure.
I'm building new box to replace this one, which will be at 3.5.
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