Ubuntu Networking :: DNS Unable To Resolve Hostnames Ubuntu 10.04
May 10, 2010
I am working behind an ISA Server proxy in a windows network. I have an Ubuntu 10.04 without have it added to windows active directory domain.I have configured Ubuntu network proxy, and everything works fine ..but:I can't ping, host, nslookup & most important I can't wget (wget: unable to resolve host address) from the terminal. I have read lots of forums and I tried to resolve the issue but I failed.Also before I had in the same network Ubuntu 9.04 (in another pc) and wget was working fine.
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Nov 26, 2010
I am wondering if it is possible to use avahi to resolve hostnames across a gateway. With gateway I mean a linux box with ip_forward'ing enabled to pass traffic between interfaces. The gateway connects two networks with all hosts running Ubuntu and specifically avahi-daemon. The gateway is not running avahi and I am not able to install it there. The firewall configuration on the gateway is not blocking any traffic between the networks. I am able to send UDP packets from a host on one network to a host on the other.
When I run tcpdump on a host and try to ping that host.local from a machine on the other network I see no traffic. This means that the gateway is not passing the multicast traffic along. Is there any special setup required on the gateway to allow this?
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Jun 28, 2010
(although I'm running Solaris, I've posted here as I expect Solaris/LINUX is irrelevant) - more of a general network Q.I have a PC running Solaris 10 (hostname MARKUNIX) and a laptop running WinXP (hostname MARK-LAPTOP). Both are connected to broadband via a router. IP addresses for each are determined via DHCP (192.168.1.nn) and I do not leave either on, 24x7. I am running Oracle on MARKUNIX and want to be able to refer to it by hostname when using Oracle tools on my laptop.Each machine can ping each other ok by ip address and curiously the Solaris PC can ping MARK-LAPTOP (I'm not sure how it resolves that?) - importantly the laptop cannot ping MARKUNIX.Now I could add MARKUNIX to my laptops hosts file but that would mean changing the file each time I boot up as the ip address for MARKUNIX will keep changing (DHCP).
Is there a way to refer to MARKUNIX without having to keep changing ip addresses and use DHCP? As I understand it the 192.168 address is private and is not really the 'real' ip address and as such can be manipulated(fixed?) even whilst using DHCP?Am I right in thinking that a static ip from my broadband supplier is the ip of my connection (router) and I'll still have the same private network referencing issues?What I've covered above pretty much is the extent of my knowledge of networking so bear that in mind please.
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May 21, 2010
How do we configure to resolve for hostnames when an IP address is provided to the DNS server.
Things I tried
The DNS daemon was started by the resolution failed. Find the logs below
** server can't find 11.127.168.192.in-addr.arpa: NXDOMAIN
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Jun 24, 2011
I recently assembled a new computer with both Windows 7 boot and Ubuntu 11.04 boot.For some reason, I can not resolve domain names at all on in Ubuntu while Windows 7 works just fine. I'm wondering if I have improperly configured my network settings. I am trying to configure this machine to have a static IP on my network of 192.168.1.3..The machine definitely has its network card installed properly and in Ubuntu I can access numeric ip addresses anywhere via browser or ssh.When I type in "google.com" in a browser I get an instant 'server not found' error page.
Anything that is described in my hosts file seems to work just fine. I can ping my router which has a LAN IP of 192.168.1.1 just fine with no packet loss.Also, I am unable to access this machine via ssh from any other machine on the network.
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Jul 14, 2010
How do you get linux to resolve local hostnames without DNS?
I've recently migrated from a fully windows home network, to a few linux machines and im unable to ping any local machines with hostname via these linux machines. i can ping IP and internet hostnames. also, windows > anything pings ok too. however linux > anything will not ping via hostname.
I beleive it's an additional service running on windows to resolve hostnames without DNS (wins/netbios).
DNS is done via a netgear DG834 router (DNS forwarding).
I know i could either use direct IP, or add machines into the hosts file, but im wondering if theres some way around that and to have it dynamically update like it does on the windows machines. static mappings seem a bit silly inside DHCP zones
I've seen some reports of avahi causing local network issues (taking over the .local domain), but i think this only extends to having to manually enter in .local after the hostname and even after removing avahi, the problem is still present.
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Jul 22, 2010
I cannot ping any hostnames on our LAN /etc/resolv.conf has both name servers configured correctly. I can ping the IP, but can't ping the hostname. I know it's something really simple, just can't put my finger on it.
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Jun 24, 2010
Every time I do a fresh install, there are a number of manual config things to change. One of them is to modify /etc/hosts to add the local IP addresses to a computer name.Can this be done via the Ubuntu networking somehow ? It would be nice not to have to change some of these config files.
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Nov 3, 2010
I have recently installed Ubuntu 10.10 and using it on a Windows Network.
I cannot ping any localhosts on the network using computer name but can ping using the IP Address.
I can ping the hosts via hostname from a windows machine fine, just not from Ubuntu
I can ping external websites using hostname like [URL]
My resolve.conf file is as follows.
# Generated by NetworkManager
nameserver 192.168.95.253
nameserver 192.168.95.234
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Aug 1, 2010
i searched the internet on how to resolve IP to hostname in my internal network. However, i could not find any solution to it. Any gurus around have any knowledge on this? i have tried whois, dig and nslookup however it doesnt give me anything.
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May 31, 2009
cant resolve anything via dns, can ping ips though, traceroute shows that traffic is going through.
[root@home ~]# uname -a
Linux home 2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:35:59 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
[root@home ~]# route -n[code].....
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Oct 4, 2010
I'm having really weird and frustrating DNS issues with my clients unable to properly resolve the server's ip address. They can resolve each other's, and outside systems, but not the server - at least, not correctly, and not all the time.
I have one Ubuntu server set up that does both DHCP and DNS serving to the Windows systems. The server has DNS forwarding turned on to forward to OpenDNS's servers (I've tried using my ISP's dns servers but the problem remains).
The server is *not* set up as a firewall; I am actually using a DLink router for that, and the Dlink is *not* set up to serve up DHCP nor DNS.
What I am getting is that my clients - and there are nothing but Windows clients - will not resolve the name of the server. For example, if I do: ping linuxserver
I get back a false IP address of 192.168.0.64 (and I've seen once a 192.168.2.49).
If, however, I put a dot in there: ping linuxserver.
I get back the *correct* IP address of 192.168.0.2, and thereafter, ping'ng linuxserver without the dot will work. Until the dns cache expires, either naturally or with ipconfig /flushdns on the windows clients.
The client *are* getting valid dhcp leases and can resolve everything happy-happy, they just will not get the proper address of the server 100% of the time.
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Mar 16, 2010
I have a ubuntu server running which acts as a firewall/dhcp router for sharing internet to all computers on the network. On the network i have my stationary computer (win7) and my laptop (macbook).The server has 3 nics installed.ETH2 for internet. ETH1 (192.168.1.2) for windows pc. ETH0 for macbook (192.168.2.2).I can share files no problems over the network. Between windows <-> server, macbook <-> server, windows <-> macbook.The problem i'm experiencing is that i can't seem to find either hostnames between windows and macbook. They connect to each other fine with the right ip addresses, but they can't seem to connect when using computer names.
On both the macbook and windows pc i can see the server and connect to it without using the ip adress.What can i do to make them see each other with their computer names? Is there anything i can install on the server and configure in order for it to work automatically?In osx you have a tab in the finder that says "shared" which shows the computers on the network and only my server pops up.The same in windows, i can only see the server but not the macbook.As said, it works perfectly fine if i use \192.168.2.2 (or smb://192.168.1.2 on the macbook) but i'd rather be able to connect via the computer names.Would also love if they could resolve automatically so when a friend connects to the network i'll see his computer name right from the start, without any re-configuration.
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Nov 4, 2010
Whenever I try to use the sudo command in the terminal I get the message unable to resolve host, then my computer name. Here's some command line output with some files which I think may be causing the problem. I have Operating Systems homework and need sudo
steve@steve-laptop:~$ sudo gedit /etc/resolv.conf
sudo: unable to resolve host steve-laptop
steve@steve-laptop:~$ cat /etc/resolv.conf
# Generated by NetworkManager
domain domain_not_set.invalid
search domain_not_set.invalid
nameserver 68.237.161.12
[Code].....
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Jul 8, 2010
I recently set up an Ubuntu server computer (10.04) with the hostname 'morbo', and with a static IP address. With all my other ubuntu systems i can ping and ssh using their host names, like:
[code]...
i can't reach it via 'morbo.local' nor can i reach my other ubuntu systems from morbo by their hostnames. I have seen a 'quick and dirty' solution which might help here : [URL]... , but i don't want to have to add every system to morbo's list and morbo to every systems list, and because it works without manual configuration on all my other systems, i don't see why it shouldn't be possible here. Currently everything connects to one d-link router - does this mean it is the DNS server?
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Jul 25, 2010
Code...
connection is set to connect automatically using dhcp... used to work, after a latest updates basically stopped working.
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Apr 29, 2010
I have linux workstation. All users home directories are NFS mounts.
Since I am facing packet loss issue users are unable to login to the workstation.
I found the packet loss using mtr from workstation to filer.
Matt's traceroute [v0.54]
Hostname
What are the things I have to check to resolve this packet loss.
Following is the ethtool out put of the workstation
Settings for eth0:
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Mar 10, 2010
I'm trying to troubleshoot some strange networking problems. The pattern seems to be that only newer distributions are affected. CentOS 5.4 and Ubuntu 8.04 work fine out-of-the-box. But Arch, Sidux, AntiX, Fedora, etc. show the same pattern of errors.Certain websites cannot be found unless I disable ipv6 in Firefox. And certain addresses cannot be resolved using various terminal commands (wget, apt-get, yum, etc.). What I would ideally like is a permanent solution, perhaps changing some settings on my router, so that I don't have to deal with this each time I test-drive a new distro. I have a hunch the issue has something to do with my DSL provider (Fairpoint) filing for bankruptcy.
One more piece of information that may or may not be relevant: I recently switched a website from one hosting company to another. I noticed there was a delay of several days where I saw the old version at the old host, but viewing the site at a friend's house or the coffee shop showed the new site on the new host. This leads me to suspect DNS issues perhaps, but this is not an area of expertise.
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Aug 13, 2010
I'm curious; for a current project a server has 4 network interfaces (eth0 and eth2 are in a bonded pair using the bonding module, and then eth1 is being used for management, while eth3 is currently unused but may be utilized for iscsi in the future).
We need to configure two different hostnames, one for the bonded pair (bond0) and one for eth1. Now I have been googling around to try and figure out how the heck this is done but I can't find much of anything. In some methods it mentions using the hostname command, however this isn't persistant after reboot.
Another mentions just editing the /etc/hosts file but I thought that was only used locally? Both bond0 and eth1 will be on separate VLANs with different DNS servers, so it needs to end up with two different FQDN's
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Mar 9, 2010
I just installed the TV-Fox add-on for Firefox (https://addons.mozilla.org/en-US/firefox/addon/11200), but it doesn't seem to work. When I choose a Channel all it does is load for ages, saying 'waiting for video'. Are there any additional packages that need to be installed for this to work, or is it just not working in general?
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Jun 29, 2010
For the past week, I haven't been able to install anything using GDebi. Every time I do, it says that only one software managment tool may be open at once. It always says this, despite it being the only one open. What's wrong?
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May 25, 2010
I just built out an Ubuntu Server 10.04.
My problem is setting the hostname. I cloned the machine, then normally on the clone, I would change the /etc/hostname and /etc/hosts file.
However, when I do this, upon restart, I get the message, "init hostname main process (some process number) terminated with status 1"Then, when the machine finally boots, the hostname is set to (none). Literally has braces like: user@(none):
I've tried: sudo hostname machine_name but it says can't resolve hostname (none).
I've Google'd around a lot but can't get it. It may have something to do with 10.04? I have been using 9.04, 9.10 with no problems.
eric@(none):~$ cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
code....
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Jul 13, 2010
When using the HyperWorks FEA software HyperView with Ubuntu Lucid the following error is displayed,ChoosePixelFormat Failed. Cannot find a suitable pixel format.Also in the terminal this error appears,Unable to resolve function glXQueryExtension is displayed.This issue can be fixed by doing the following for nvidia cards, sudo ln -s /usr/lib/nvidia-current/libGL.so.1 /usr/lib/libGL.so.1
or for ATI cards,sudo ln -s /usr/lib/fglrx/libGL.so.1 /usr/lib/libGL.so.1
Note you must install the Nvidia or ATI proprietary drivers for opengl graphics support to be able to use HyperWorks.
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Aug 11, 2010
i am having a problem in the terminal window. When i try to do various operations i get the following message before the operation starts.
sudo: unable to resolve host Tims-Laptop
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Nov 21, 2010
In Ubuntu 10.10 am trying to install Aptitude and have been through installing and un-installing but keep getting the same msg
Failed to execute child process "su-to-root" (No such file or directory)
how to resolve this issue.
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Jan 24, 2011
I am unable to print from Wine applications (including Notepad) because Wine thinks I have no printers installed. I have a network printer and print-to-file both working fine in normal KDE applications. I did some looking around and found the following:http://www.witch.westfalen.de/Wine-H...intconfig.html
This is very old, and probably very out of date. I also had trouble following the examples. In any case I don't have anything called winerc or wine.conf. I just have a .wine directory.
Supposedly I should have registry keys for printers in Wine, so I looked where those are supposed to be. I have two keys in HKEY_LOCAL_MACHINESystemCurrentControlSetContro lPrintPrinters: (Default) and DefaultSpoolDirectory. Perhaps if I added the right key here I could get Wine to notice CUPS? I wouldn't begin to know what to put though.
http://www.winehq.org/docs/wineusr-g...s-to-configure claims that Wine should "just work" with CUPS. So much for that. It also says that if it doesn't work with CUPS it falls back to look in /etc/printcap. I have one of those, but it doesn't contain anything except the default comment telling me not to edit the file. Maybe if there's a way to regenerate /etc/printcap to contain the printers that show up in KDE, Wine would notice. Again, I have no clue how to do that.
I'm running Kubuntu 10.10 x64, and I'm using Wine 1.2, not Wine 1.0. All my packages are completely up to date.
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Feb 12, 2010
The proprietary drivers that came with my ubuntu 9.04 installation are not doing their job. My cpu is managing my graphics (compiz-fusion, and a 3d obj running in the background) and I alway have a core of my phenom processor close to 100. I have an ATI 4870 gpu with 2gb internal ram on the card. Also, recordmydesktop, electric sheep, and any other simple graphics all lag. 3d games on the other hand have no problem. I decided I would try the driver I downloaded from AMD. I removed the proprietary driver, ran...
Code:
sudo sh ./ati-driver-installer-10-1-x86.x86_64.run --buildpkg Ubuntu/jaunty
and I get
Code:
Created directory fglrx-install.lPNHYh
Verifying archive integrity... All good.
Uncompressing ATI Proprietary Linux Driver-8.69 .....
/bin/sh: execstack: not found
make: *** [binary-install/xorg-driver-fglrx] Error 127
dpkg-buildpackage: failure: debian/rules binary gave error exit status 2
Removing temporary directory: fglrx-install.lPNHYh
How to make the proprietary driver work better I'm all for that to.
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Apr 30, 2010
I got my server set up with 10.04, and with everything installed: DHCP, SSH, Samba, VBox, etc.
DHCP, SSH work fine, but I am having problems where I cannot ping the hostname of the machine.
It worked for a few minutes after I got everything installed and now it's not letting me connect via hostname. I can connect fine if I use the IP address. I cannot ping the machine by hostname unless I add it's IP address to the hosts file.
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Apr 30, 2010
Can't install sp-auth code...
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Sep 27, 2010
I am running 10.0.4 and am having problems installing Startup Disk Creator. what can I do to resolve the problem?
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