|Summary:||dhclient recreates /etc/resolv.conf on all lease renewals|
|Product:||[Retired] Red Hat Linux||Reporter:||Kyle Gonzales <kgonzale>|
|Component:||dhcp||Assignee:||Daniel Walsh <dwalsh>|
|Status:||CLOSED RAWHIDE||QA Contact:|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2003-08-01 19:22:50 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
Description Kyle Gonzales 2002-10-30 23:59:54 UTC
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20021003 Description of problem: dhclient recreates /etc/resolv.conf on ALL lease renewals, even if no new or changed information is pulled from the DHCP server. It breaks anything that needs something to be temporarily entered manually into /etc/resolv.conf, and breaks VPN clients that change /etc/resolv.conf to different values while they are enabled. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Bring up an interface using DHCP 2. Once you have an address and your resolv.conf info, make a change manually to the resolv.conf file 3. Wait for the lease to renew Actual Results: The manual changes will be removed from the file when the DHCP lease renews. Expected Results: Like with dhcpcd, dhclient should do nothing is no new information is brought in from the DHCP server. Additional info: This is causing problems with people using the Cisco VPN client with 8.0. This behavior does not occur on RH 7.2 using dhcpcd. I will dig into the /sbin/dhclient-script file (which is the culprit) and see if I can't write a workaround for this.
Comment 1 Eugene Kanter 2002-12-26 03:58:29 UTC
This creates huge problems when two network cards are active and at least one managed by a DHCP. Let's say that eth0 is configured by DHCP. After ifdown eth0 /etc/resolv.conf gets cleared out and system is left without DNS. Problem is still present in Phoebe.
Comment 2 Daniel Walsh 2003-01-14 22:29:44 UTC
Two things. I propose making a change so that Renew will not update the resolv.conf. Secondly if you don't want the dhcp messing with /etc/resolv.conf at all you need to set PEERDNS to no
Comment 3 Eugene Kanter 2003-01-15 03:10:11 UTC
Not clear how problem with two network cards can be solved.
Comment 4 Eugene Kanter 2003-07-29 15:54:17 UTC
Any more comments on two network cards issue? Has anybody tested this on 9 or current beta?
Comment 5 Daniel Walsh 2003-08-01 19:22:50 UTC
I have changed the script to not rewrite the resolv.conf on renew. Also if you are using two cards you should turn off peerdns and configure resolv.conf manually. This will be in rawhide as dhcp-3.0pl2-6.10
Comment 6 Kyle Gonzales 2003-08-01 20:18:27 UTC
Excellent! Will this bugfix be backported to 8.0 and 9?