Red Hat Bugzilla – Bug 164426
The "Automatically obtain DNS information from provider" box is ignored
Last modified: 2008-08-02 19:40:33 EDT
Description of problem: For an Ethernet Device, the "Automatically obtain DNS information from provider" box is ignored. The information is obtained automatically even if the box is unchecked and explicit DNS servers are entered under the DNS tab. This makes it impossible to work around routers which have DNS handling bugs and tell the OS to use the router itself as a DNS server. Version-Release number of selected component (if applicable): system-config-network-1.3.26-1 How reproducible: always Steps to Reproduce: 1. Configure an ethernet device. 2. Uncheck the "Automatically obtain DNS information from provider" box. 3. Manually enter DNS server addresses. Actual results: Upon reboot, the manually entered DNS addresses are replaced with the info automatically obtained from the buggy router. Expected results: The manually entered DNS addresses should remain in /etc/resolv.conf so they can be used without having to reenter them after each reboot. Additional info: Am using "Automatically obtain IP address settings with dhcp" (BTW, dhcp is initially grayed out, so some people may not realize that it can in fact be selected).
For some reason it's working now. I don't know why. It seems to have happened all by itself, AFTER I rebooted the first time and noticed that my settings had been erased. Now they're back, though I don't think I entered them again. Can someone else reproduce this bug?
I can, exactly as outlined above. Easily reproduced. % /etc/rc.d/init.d/network stop <edit using GUI, save, verify change to /etc/resolv.conf> % /etc/rc.d/init.d/network start </etc/resolv.conf restored> The problem persists across reboot. system-config-network-1.3.26-1
Fast guess: This is dhclient (dhcp) running and overwriting /etc/resolv.conf
This appears likely, as dhclient is indeed running. Also, in the manpage for dhclient.conf, I read: "The client now has some very limited support for doing DNS updates when a lease is acquired. This is prototypical, and probably doesnât do what you want." Which, at least, seems to describe the problem. But I can't discover what causes it to acquire the DNS info, or how to shut it off. Needless to say, I do need to acquire a dynamic IP address from my ISP.
Closing because bug has remained in NEEDINFO state without reply for a long period of time. Note that FC3 and FC4 are supported by Fedora Legacy for security fixes only. Please install a still supported version and retest. If it still occurs on FC5 or FC6, please reopen and assign to the correct version. Otherwise, if this a security issue, please change the product to Fedora Legacy. Thanks, and we are sorry that we did not get to this bug earlier. This bug was originally filed against a much earlier version of Fedora Core, and significant changes have taken place since the last version for which this bug is confirmed. If it was dhclient, the -R option controls what information is requested from the DHCP server, as does the "request" keyword in dhclient.conf. The -R flag was added by RedHat on May 26 2006 for package 3.0.4-10