Networking :: DHCP Get IP Address But Not Overwrite Resolv.conf?

Aug 16, 2010

I have an Ubuntu 10.04 server. It gets its IP address by DHCP (the router has a fixed reservation so it always gets the same one). However, it needs its nameserver to be itself, and not the DNS servers given out by the router. How can I make dhcp not overwrite resolve.conf?

(Yes I know I could just set a static IP. But I'm testing stuff out here, and want to know if it can be done without doing that.)

View 2 Replies


Networking :: /etc/resolv.conf Not Updated By Dhcp

Mar 4, 2010

I am using kubuntu 9.10 64-bit on AMD M500 machine i removed networkmanager (because i had frequent disconnect) and installed wicd but the /etc/resolv.conf had a comment on top which says that it is to be configured by networkmanager (still) I put the DNS in there manually and it works What to put in there so that it uses DHCP ? Maybe its set to be not written by anyone other than networkmanager ??

View 1 Replies View Related

OpenSUSE Network :: Force NetworkManager To Overwrite Resolv.conf?

Oct 21, 2009

I'm having some trouble with my networkmanager on openSuse 11.2. I want it to get the DNS Server from DHCP, but it notices that I had another process modify it (dhcpcd to be exact) and it just won't overwrite it, resulting in an out of date DNS server to be used.

View 2 Replies View Related

Fedora Networking :: Resolv.conf Not Replaced

Nov 1, 2010

I use Fedora 13 (minimal installation), ISC DHCP server 4.1.1-P1. I'm running Fedora 13 too on a separate machine (minimal installation) with ISC DHCPclient 4.1.1-P1. My goal is to do some IPv6 testing. When I use the DHCP client manually (dhclient -6 -timeout 5 -d -v eth0), the client retrieves and installs a dynamically assigned IPv6 address.

Additionally, the client gets 1 DNS resolver address and 1 DNS search list. The resolver address and DNS search list always get written into /etc/resolv.conf. Perfect, exactly what I need. But when I do a "service network restart" or restart my system (which should trigger the same, as far as I understood), the DNS resolver addr and the search list get written into /etc/ and the /etc/resolv.conf stays as before. How can I change this behavior? I don't need the .save file, I just want to have /etc/resolv.conf replaced by the latest DNS information.

View 2 Replies View Related

Ubuntu Networking :: How To Keep /etc/resolv.conf Static

Apr 22, 2010

How can I keep /etc/resolv.conf static ... as in preventing it from being changed by the network manager ... without actually disabling the network manager (so wireless users can get their wireless setup that includes IP address, but leave the resolver configuration as is)?

View 1 Replies View Related

Ubuntu Networking :: Resolv.conf Keeps Getting Reset By Something

Aug 26, 2011

I need help figuring out why my resolv.conf keeps changing to this, causing me to not be able to access the outside internet and only the local network.I thought I fixed it by getting rid of the loopback interface and adding in the eth0 interface in /etc/network/interfaces URl...And then things would work temporarily, and eventually the nameserver in resolv.conf would get reverted again.

View 1 Replies View Related

Networking :: Resolv.conf Wrong Format?

Jul 1, 2010

When I boot my computer (Ubuntu 9.10) /etc/resolv.conf is written as:# Generated by Connection Managernameserver, if I try to do anything from the command line, I get an error like:host: parse of /etc/resolv.conf failedI then need to edit /etc/resolv.conf to:

# Generated by Connection Manager


View 2 Replies View Related

Fedora Networking :: Resolv.conf Reset Itself In Default?

Jun 4, 2010

I'm trying to set this open-nic-dns ( as default (instead of - router-ip). So if I try to edit /etc/resolv.conf to this nameserver - but if i restart it's again.

View 3 Replies View Related

Ubuntu Networking :: Resolv.conf Goes Blank On Reboot?

Jan 4, 2010

I'm having problems with my resolv.conf file. Every time I reboot my computer it goes blank and I have to re-type it before I can get on the network. How do I prevent it from being overwritten?

View 6 Replies View Related

Ubuntu Networking :: KVPNC And VPN / Errors The /etc/resolv.conf?

Feb 4, 2010

I am using KVPNC (recommended by the VPN owner) on Ubuntu 9.10 using my Universities direct Ethernet connection.

I have downloaded all the .ovpn scripts to a directory. I have downloaded KVPNC from the repository (apparently for 9.10 you do not download from the KVPNC website).

I then use sudo kvpnc and select a server (since there are many based on the .ovpn files).I click connect and the script works and tells me I have a connection. See below for an example. All appears to work.

But when I actually load any Internet program e.g. Firefox it cannot find a website.This happens for all servers which have different locations around the world.When I disconnect KVPNC I still have no access. I have to remove the Ethernet cable before it works again.

debug: Connect try requested, profile: Stockholm, type: OpenVPN
debug: openvpn: /usr/sbin/openvpn
debug: Support for TUN/TAP found (compiled into kernel or kernel module already loaded).
debug: Default interface: "eth0".
debug: IP address of default interface: "my IP address".

I realise there are errors e.g. the /etc/resolv.conf must be a symlink but have tried doing this and still have exactly the same issues.

View 2 Replies View Related

Ubuntu Networking :: /etc/resolv.conf Not Updated On Startup?

Mar 9, 2010

I'm using 9.10 Ubuntu Karmic 64-bit (but same thing happens on my 32 bit VM on same PC).

My /etc/resolf/conf file is not updated with DNS information on first boot. The DNS information is in the /etc/network/interfaces file.

The trick I have to do every time I reboot the PC is:

sudo ifdown eth0 && sudo ifup eth0

First off, why? Second how can I resolve this issue?

I have three NICs eth0 and 1 are normal LANs connected to the internet, but I choose eth0 as the primary. eth2 is a local private one. the DNS information from eth0 should be in the resolv.conf file but isn't. The file is empty at bootup, except for some comments instructing me not to edit this. After running the above sudo commands the file is properly updated and internet works.

Here's my /etc/network/interfaces file's contents:

auto lo
iface lo inet loopback
auto eth0
#iface eth0 inet dhcp


View 3 Replies View Related

Ubuntu Networking :: Resolv.conf Doesn't Work?

Oct 12, 2010

My network works before but now it has follow issue, when I ping, I got Quote:

ping: unknown host but my network still works partially because I can still connect to a DNS listed in my /etc/resolv.conf to get host's ip adress by Quote:

host -t a and then I ping the returned IP result, the ping works fine. the issue is that I can't connect to Internet, what I can remember is that I ever removed /etc/resolv.conf and this file was created again by network-manager, and I already verified the two dns IPs listed in the resolv.conf are both correct and works fine with command host.

View 2 Replies View Related

Networking :: Resolv.conf Doesn't Work With Secondary DNS?

Jan 11, 2010

We recently moved all our Red Hat Linux machines from NIS to LDAP and we're seeing some issues with name resolution.

One thing I should mention is that DNS (the first nameserver in resolv.conf)is being used by LDAP for name resolution.

Now our resolv.conf file has always looked like this.

Nameserver xx.xx.xx.xx

The problem is that the above resolv.conf file doesnt work anymore. The only way that our workstations get name resolution is by commenting out the second and forth lines, which happen to be our secondary DNS. This has got me confused because why would resolv.conf be broken by having a secondary nameserver and search path? Shouldnt it just use the first nameserver unless it fails to resolve? Almost seems like just having the secondary in the file breaks name resolution. I cant ping local hosts or anything on the internet unless I do this:

Nameserver xx.xx.xx.xx

View 1 Replies View Related

Networking :: Resolv.conf Gets Rewritten On Reboot Even If Chmod 444?

Dec 1, 2009

my rounter causes puppy to write an improper dns entry in resolv.conf. Consequently I have to manually write it, then I have to place a command on it to make sure it doesn't get rewritten on boot, or after a couple of hours use. I had this problem with xubuntu as well.


I solved this problem in ubuntu by using the chattr command.


Puppy won't let me do this. When I use the chattr +i /etc/resolv.conf, it gives me this error. chattr: Inappropriate ioctl for device while reading flags on /etc/resolv.conf I tried chmod 444 but it had no effect on reboot. resolv.conf was rewritten again. How can I make sure this file does not get rewritten. Why won't chattr work?

View 11 Replies View Related

Networking :: Secondary Nameserver Resolv.conf Not Queried?

Dec 7, 2010

I'm trying to query the second nameserver on a local network to resolve local domain names to IP's.

$ ping ids.mydomain.loc
ping: unknown host mydomain.loc


View 6 Replies View Related

Networking :: Timeout Options In Resolv.conf Have No Effect

Jul 10, 2011

Im running several linux boxes, all redat enterprise linux. Versions vary between 4 and 5.

Since we have problems with our DNS servers, Im trying to lower the DNS resolve timeout to the minimum to avoid system hangs etc.

However, it seems that nothing I do have any effect. when Im running time nslookup or time host while my first DNS server is down, it always takes about 1.09sec as opposed to 0.09sec when the first server in the list is available. I tried playing with options timeout:X attemps:X but it simply doesnt seem to do anything, even if I set it to high values. Some internet posts suggested having timeout:0.5 or less, but that also doesnt seem to do anything.

when I use:
options timeout:0.3 attempts:1
- doesn't do anything.
options timeout:1 attempts:1
- doesn't do anything.
options timeout:10 attempts:3
- doesn't do anything.

It doesn't work when I put it in the first line of the file. It doesn't work when I put it in the last line of the file.

It doesn't work if I put it in "export RES_OPTIONS=options timeout:X attempts:Y"
I tried it on 2 different machines.

View 1 Replies View Related

Fedora Networking :: Name Resolution: Resolv.conf - NetworkManager - Nameserver

Mar 22, 2009

I just installed F10 from a Live download iso on a Sony VAIO laptop with an Intel PRO/Wireless LAN2100 3B Mini PCI Adapter. The linux driver is ipw2100 and functions without problems.

After the install I accepted the update downloads offer and downloaded somewhere around 170 updates. The kernel version is

I am using a Linksys WRT55AG as a DHCP server. Using NetworkManger it assigns IP addresses without incident.

My problem is that I can't get name resolution to function without manual intervention.

I can ping other wireless nodes on my network and the response to $ dig -q is: ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 30153

The /etc/resolv.conf file contains no entry for 'nameserver=' and if I manually edit /etc/resolv.conf, it is overwritten on reboot or restarting the NetworkManager service. I am aware of /etc/sysconfig/networking/profiles/default/resolv.conf.

Additionally, in the var/log/messages file I can see that NetworkManager makes links between /etc/resolv.conf and the default version.

However, after either rebooting or restarting the NetworkManager service, if I manually enter a DNS address (my wireless router) under the DNS tab of the system-config-network 1.5.95 application. This address does not persist after either rebooting or restarting NetworkManager.

If I disable NetworkManager, I can't get the WRT55AG to assign the wilreless adapter an IP address.

So the bottom line and my question is what do I need to do in order to simply boot and have wireless connectivity?

To what file does system-config-network 1.5.95 write the DNS address entered from it's GUI?

View 6 Replies View Related

Fedora Networking :: Wvdial Does Not Automatically Update Resolv.conf In Fc 12

Mar 31, 2010

My resolv.conf states:

No nameservers found; Try putting DNS servers into your ifcfg files in /etc/sysconfig/network-scripts like so: [...]

After running wvdial. I suppose I have to create a file ifcfg-ppp0, but what does it have to contain in order to automatically grep the DNS servers from wvdial?

In Ubuntu, it works just fine, just that I don't have an Ubuntu installation anymore.

View 3 Replies View Related

Ubuntu Networking :: No DNS Servers In Resolv.conf Before Login Karmic 9.10

Jan 11, 2010

I'm having an issue with resolv.conf being empty (apart from the resolvconf header) upon first login. I am assigned a DHCP lease fine, it also appears that DNS works briefly as all my NFS file shares seem to be working ok and they have name rather than an IP address in /etc/fstab. I have to manually re establish my lease by using the Network Manager panel each time I first login.

View 4 Replies View Related

Ubuntu Networking :: Stop Wvdial From Overwriting /etc/resolv.conf?

Mar 3, 2010

I use wvdial and a 3G modem to connect to the network. On the same host I also run bind9 which is authorative for my local network.The problem is that when wvdial connects, it overwrites /etc/resolv.conf, which means that DNS lookups on that host no longer get made to localhost (as specified by the original resolv.conf file) and end up at the local instance of bind which is authorative for in-house hostnames, but end up with the ISP who doesn't know my in-house host names.The local DNS forwards to the ISP, so the ISP's DNS'es are not required in resolv.conf.How can I prevent wvdial from overwriting /etc/resolv.conf?Removing write privileges from /etc/resolv.conf did not work.

View 3 Replies View Related

Ubuntu Networking :: Changing Namesevers In Resolv.conf Permanently?

Sep 22, 2010

My Internet connection runs slow and jerky, but can be fixed by using the Google public nameservers instead of the default one in this file. Problem is, the changes keep being reverted, even when I chmoded the file to have read-only permissions by everyone.

How can I change the nameserves permanently?

View 4 Replies View Related

Fedora Networking :: F12 Overriding Resolv.conf Info Doesn't Work

Dec 15, 2009

I find it very frustrating that documentation suggests using PEERDNS=no in /etc/sysconfig/network-scripts/ ifcfg-eth0 in order to override resolv.conf information only to find out that both NM and network init scripts ignore DNS1, DNS2 and DOMAIN settings.So my question is how do I correctly configure resolv.conf settings that will persistently override dhcp information on a F12 system that has NM removed and uses the network service scripts?

View 3 Replies View Related

Networking :: /etc/resolv.conf Search Line Depending On Connected Network ?

Dec 14, 2009

I use my laptop both at home and at my job. At home it gives me the correct search line.

But when I am at the office I only get 1 search entry while if you boot in windows it gives you 3

(for example):

So this should be in /etc/resolv.conf search domain

It seems that this is not passed by the (Windows) dhcp server (Active Directory).

Is there any way that linux can detect depending on the network it is in that there are a few search domains added(for example like resolvconf does with ppp tunnels)?

View 4 Replies View Related

Networking :: Search Path In Resolv.conf Overwritten By The Hostname After Reboot?

Mar 19, 2009

Before reboot,
$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search mycomp.local

After reboot, the search path in resolv.conf is overwritten by the hostname.

$ cat /etc/resolv.conf
; generated by /sbin/dhclient-script
search penguin

View 3 Replies View Related

Networking :: Configure A (openSUSE) Client To Dhcp To EBox DHCP Server - Lease An IP Address

Mar 25, 2010

I am puzzled with trying to configure a linux (openSUSE) client to dhcp to eBox DHCP server. I am using dhclient to lease an IP address with dhclient eth0 -s and get a response

openSUSE11232CL1 dhclient: DHCPDISCOVER on eth0 to port 67 interval 4
openSUSE11232CL1 dhclient: DHCPOFFER from
openSUSE11232CL1 dhclient: DHCPREQUEST on eth0 to port 67
openSUSE11232CL1 dhclient: send_packet: Network is unreachable
openSUSE11232CL1 dhclient: send_packet: please consult README file regarding broadcast address.

The server reports eBox141 dhcpd: DHCPDISCOVER from 00:0c:29:3e:57:a3 ( via eth0
eBox141 dhcpd: DHCPOFFER on to 00:0c:29:3e:57:a3 ( via eth0

I interpret this as the server receives the request and the client accepting it but the lease does not last long and the connection breaks. what this could be and why the connection breaks? Or my undestanding is totally wrong on how it works and should work? And BTW, where is that README file that's referenced in the message I receive on the client?

View 2 Replies View Related

Ubuntu Networking :: How To Tamed Resolvconf From Putting Stale/old Info In Resolv.conf

Feb 3, 2010

I have resolvconf installed to prevent multiple programs from fighting to update /etc/resolv.conf at the same time an corrupting it.From what I understand resolvconf a package found in the repos is suppose to act as the gatekeeper to /etc/resolv.conf and all programs must go thru it to update resolv.conf. Hence /etc/resolv.conf is written in a orderly manner.

from time to time though something goes awry and resolvconf writes old, wrong stale into /etc/resolv.conf, for a connection that may be down or no longer exists along with the correct info for the current connection.Usually i would fix this by uninstalling and reinstalling the resolvconf package.I was tired of this so i went digging around in

/etc/resolvconf and found the subdirectory

This is where it looks like resolvconf caches interface info that goes into


I think what happens is resolvconf is suppose to clean this up in an orderly way but sometimes old interface files may be left here.So for instance in mine were the files eth0 and wlan0.with dns info for each stored in the relative file. I no longer have an eth0 only a wlan0 so resolvconf was still pulling info from both

/etc/resolvconf/run/interface/wlan0 and /etc/resolvconf/run/interface/eth0

with the result of an incorrect dns info in /etc/resolv.conf To make a long story short I just deleted /etc/resolvconf/run/interface/eth0 and was good to go. So if you are using resolvconf and run into this problem you may use this work around.

View 2 Replies View Related

CentOS 5 Networking :: Resolv.conf -- Systems Ignore Secondary & Tertiary Nameservers?

Feb 10, 2011

I have a number of CentOS servers with latest 5.xI have 3 nameservers in the resolv.conf files. All 3 nameservers test out fine when checking for domain lookups.I'm having some trouble with ns1 and shut it down.l None of the CentOS machines fail over to the ns2 & ns3 entries. Basically everything stops resolving even though the other 2 nameservers are alive and well.

View 1 Replies View Related

Ubuntu Networking :: Static IP Address And The Install Configures For A DHCP Configured Address - Network Not Starting

Dec 16, 2010

Version 10.04 LTS. Installed desktop version and network worked but I needed a static IP address and the install configures for a DHCP configured address. I tried changing to static address using the System->Preferences->Network Connections application but was unable to get the system to come up with the network up.

So I manually modified the /etc/network/interfaces and the /etc/resolv.conf files. I restart the system but when I do an ifconfig, I don't see a configured IP address on eth0 (only the loopback address). If I run /sbin/ifup eth0 everything then works fine and ifconfig shows the correct address bound to eth0.

My files are as follows:

View 2 Replies View Related

Ubuntu Networking :: IP Address Set To Manual But Still Queries DHCP For Address

Mar 12, 2011

I'm running Ubuntu 10.10 and I'm having problems trying to assign it a static IP address. No matter what I put in the Preferences->Networking area (identifying the interface as Manual)... it still will query DHCP for an address if I run the dhclient command. I'm using to using ubuntu server where I just set the IP in the interfaces config file.

View 1 Replies View Related

Debian Configuration :: Networking - Netinst CD - Internet Connection Only Works After Edit The Interfaces And Resolv.conf Files Manually

Aug 3, 2010

I had some trouble with the netinst CD and I had to install lenny with the 6DVDs instead. My internet connection only works after I edit the interfaces and resolv.conf files manually. So my question is: can I do that from the netinst CD before it actually needs the connection to install everything? (otherwise I'll just need to use the DVDs.

View 4 Replies View Related

Copyrights 2005-15, All rights reserved