News Group Posts

login slow dns setup

Newsgroups: comp.unix.sco.misc
From: bill@wjv.com (Bill Vermillion)
Subject: Re: Login prompt very slow
Message-ID: <G20tHI.19rJ@wjv.com> 
References: <8rivo7$ufn$1@nnrp1.deja.com>
<4.3.2.7.2.20001005212300.00dce100@scogr1.cscc.maximus.com>
<4.3.2.7.2.20001006074711.00ad7ad0@172.20.1.1>
<4.3.2.7.2.20001006133928.00dcdf00@scogr1.cscc.maximus.com> 
Date: Fri, 6 Oct 2000 18:17:42 GMT

In article <4.3.2.7.2.20001006133928.00dcdf00@scogr1.cscc.maximus.com>,
Ken Wolff  <kenw@cscc.maximus.com> wrote:
>At 01:22 PM 10/6/00 -0400, Tony Lawrence wrote:

>>Just for the heck of it, I removed all other machine's IP
>>addresses from a Corel box here and tried telnets and ftp's to
>>it.  *Most* of the time the delay was not long enough to cause
>>any problem, but 3 times out of 10, telnet or ftp would fail and
>>give up.  That's on a local lan.. same problem, same solution.

>Correct. I'm aware of that. What I've always complained about
>regarding this problem is that:

>- If the IP of the remote machine is in /etc/hosts...... and
>- If resolv.conf contains "hostresorder local bind"..... and
>- If your internet connection goes down (no DNS)....
>= you get a delay.
>
>To quote 'man resolv.conf'

>           For example, the following line specifies a lookup
>           order of NIS, DNS, and finally the /etc/hosts file. All
>           databases will be tried until a match is found.

>           hostresorder nis bind local

>...wrong. All databases will be tried even if matches are found. Or
>at least that seems to be the situation.

The problem is the machine you are trying to connect TO need to
look up the entry, and the target machine has no clue as to
/etc/hosts on the Unix side.   I'm also assuming that your
target machine uses DNS using the ISP's DNS so that it will time
out trying to find that information.

The man is correct, the Unix system will look in the files in the
order in which you specify.   hostresorder local bind witll go
to /etc/hosts and then to DNS - ON THE UNIX MACHINE - not the
targe.


-- 
Bill Vermillion -   bv @ wjv . com

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