Bug 22078

Summary:	problem with local networks
Product:	[Retired] Red Hat Linux	Reporter:	Need Real Name <mal>
Component:	caching-nameserver	Assignee:	Florian La Roche <laroche>
Status:	CLOSED NOTABUG	QA Contact:	Dale Lovelace <dale>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	7.0	CC:	krader, pekkas
Target Milestone:	---
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2000-12-11 21:52:46 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Need Real Name 2000-12-11 21:52:44 UTC

The caching nameserver is installed
and /etc/resolv.conf is
----------------
search localdomain 
nameserver 127.0.0.1
----------------

Many programs (like samba, netstat and etc)
seems doing DNS lookup even on non-routed IPs
like 192.168.1.71
They are probably made through caching nameserver.
The cachining nameserver seems doing a lookup of these 
addresses and this caused huge delay.
I think the caching nameserver should return the answer right 
away, without all these very annoing delays on 
non-routed  networks when some tools are used.

I think something should be fixed so netstat -a ; ipchains -L and etc
return faster than it is now. Now it is extremely slow.
in the same time netstat -an (-n do not resolve) is extremely fast.

Comment 1 Pekka Savola 2000-12-12 16:30:35 UTC

This is as designed.

You should run a full-fledged DNS for those non-routable IP-addresses 
or add them to /etc/hosts.

Comment 2 Need Real Name 2000-12-12 16:53:31 UTC

Is there a way to add to /etc/hosts
entire subnet, otherwise it may be too many hosts to add.

Comment 3 Pekka Savola 2000-12-12 17:23:19 UTC

In that kind of scenario, I recommend setting up a DNS server.  Basically
"distributes" one centrally managed "/etc/hosts" to all systems.  You only
need to define those hosts on your server.

There are a few HOWTO's and guides around.  The definitions will be in /etc/named.conf
and under /var/named.

Comment 4 Dave Wysochanski 2007-01-24 01:19:40 UTC

*** Bug 224079 has been marked as a duplicate of this bug. ***