Networking :: Resolving Names From DNS Server ?
Jun 8, 2011
I have this in my resolv.conf file:
Code:
I have also used external DNS servers just to eliminate there being a problem with 192.168.1.67 (which many other computers are using successfully).
When I attempt to ping Google just to see if it works I receive this:
Code:
If I issue a host command against google.com I receive this:
Code:
I had thought that host and the name lookup routine would use the same DNS server and it should fail on the host command as well as the ping, but evidently not.
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Jun 6, 2011
I'm on 11.04 on VMware 4.1, trying to get name resolution working. I can ping by IP other systems including on the internet. The network manager Icon on top shows a wireless icon, but the 'Wired Network' is grayed out and below that says 'device not managed'. What can I do to fix this? The interfaces file has the auto lo, then below that
iface eth0 inet static
stuff...
It doesn't work with or without the auto eth0 entries.
I have the nic set to DHCP and on my dhcp server gave it the mac address of the box to assign it an address, that is working.
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Jul 27, 2010
At work we run DHCP. hostnames have the format: computername.city.mycompany.com
I have a laptop runing Fedora 13 and a desktop I use for backups, etc. My laptop is named copernicus. Desktop is named galileo. If ping either hostname from itself I get back the localhost IP address. If I ping the fully resolved hostname it tells me unknown host. The desktop is exporting an NFS share I use for backing up work data. I need the laptop to be able to resolve host names to mount the share since we use DHCP. The desktop is dual boot and if it is booted into windows my laptop can resolve the hostname properly. What do I need to do in Fedora to get it to register a hostname with the DNS and/or DHCP server? Should the domain and the search path below both say the same thing?
Here is resolv.conf on the laptop (I am at home). The desktop looks the same, except for a different nameserver. Both computers can resolve other hostnames, just not each other.
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Feb 6, 2011
I just set up my first ever bind9 DNS server running on ubuntu server 10.04. This server is also my gateway/dhcp server.
Here is what is weird: If I do a dig @8.8.8.8 dschuett-lmtl.scs.local from any of my clients it resolves?!?! Dig shows that it got the answer from MY Bind9 DNS server (and NOT Google's of course), but why is it still resolving when I'm telling it to use and external DNS server?
The other weird thing is that the SAME EXACT dig command above does NOT resolve internal host names if I do it from the Bind9 DNS server. - Which is what i would expect SHOULD be happening if done from the client machines...
Here are the dig results:
From any internal client:
Code:
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Jan 25, 2010
In my network my proxy / firewall (iptables + squid) works as dns forwarder. I needed to configure an url at my /etc/hosts in my linux boxes which are behind the firewall into the lan. I want my machine to look at its local /etc/hosts file before querying the dns to the firewall.
Despite I configured my /etc/host.conf this way:
My machine keeps resolving the name through the dns forwarder (firewall) and not from the /etc/hosts file first.
Is there any action needed after configuring /etc/host.conf? Any service to restart?
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Jul 11, 2010
I'm having trouble getting my debian box to find my windows box. This should be possible using netbios names.
The debian box is a newly installed minimal (nothing but base) release, to which I've added samba (using apt-get).
The windows box can see the debuan box just fine. Attempting to ping it by name results with:
Pinging debbox [192.168.1.100] with 32 bytes of data: ...
But going back the other way, the debian box can't see the windows box.
ping: unknown host winbox
I'm pretty happy that the windows box is behaving itself as there are no problems getting it to interact with other windows machines on the network.
Looking on google, the suggestion is to modify the host line in /etc/nsswitch.conf to include wins: hosts: files dns [b]wins[/b]
This worked on other linux machines in the past but not this time.
So my guess it that I've got SAMBA mis-configured or I'm missing a package.
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Sep 22, 2010
I have been casually using Unix for about 20 years, but I've never really done anything beyond basic user things unless I had instructions/help.
I've set up an Ubuntu 10.04 system and it works great except for one thing. It doesn't resolve local names.
I can ping or access other systems by IP Address and I can resolve internet names with no problems, but it won't recognize any of the other systems on my home network.
The system is set up for dhcp and everything is defaulted from the installation. There is no DNS suffix or domain set up on my router.
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Mar 11, 2011
I updated to 11.4 today and software manager is having trouble resolving host names. below is the exact error through software manager
Download (curl) error for 'http://download.opensuse.org/distribution/11.4/repo/non-oss/repodata/repomd.xml':
Error code: Connection failed
Error message: Couldn't resolve host 'download.opensuse.org'
here are the steps that i have taken already to resolve and troubleshoot the issue.
i can ping Google.
i can browse the Internet
i can browser the repo Index of / through my browser.
i have insured that ipv6 is disabled through network configuration through yast.
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Feb 14, 2010
I have a NAS server running Debian with Dnsmasq (local DNS and DHCP service). This is working well, including fetching upstream requests from my ISP's DNS service and caching them locally. I have another PC not running Ubuntu which happily resolves DNS and non-DNS names. E.g.
Code:
ping hagrid.
ping hagrid
both work.
However, this is not the case on my Ubuntu PC. It is only able to resolve DNS names, not non-DNS names.
Code:
ping hagrid.
works but
Code:
ping hagrid
does not.
I have the standard nsswitch.conf and host.conf.
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Apr 9, 2010
I'm confused. Why do I get a response from ping for any scrambled internet server name I type in??The only thing that is necessary is to start with "vvvvvv."(It should be triple W in this post, but I need to do this work around due to the forum rules )And it always resolved to different IPs with similar ping times.What's going on?
Code: > ping vvvvvv.q3g87uv8123907.qt1
PING vvvvvv.q3g87uv8123907.qt1 (80.156.86.78) 56(84) bytes of data.
64 bytes from vvvvvv.q3g87uv8123907.qt1 (80.156.86.78): icmp_seq=1 ttl=249 time=55.6 ms
[code]....
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Mar 19, 2009
I recently installed bind9 on mandriva 2008.1, after having done the necessary configuration.. I still can't find my domain I configured cant ping on other machines on the LAN but can actually ping on any other website on the internet even though name server is configured to point to local machine..... I dont understand what I'm doing wrong.
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Mar 24, 2010
I have change my mail server previous when i open my domain [url] it goes to [url].Now i have change my Mail server from openwebmail to Zimbra Server .so when i again open to it mail.mydomain.com ,proxy server takes to [url].
If i bypass proxy server then it open mail.mydomain.com(My zimbra Page).i have also updated internal DNS addresss But Squid not updating it
How to update Squid DNS Entry ? how to Update Squid Cache records?
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Jun 7, 2009
I have installed Bind DNS server in Opensuse 11.1 and it was running fine for two weeks. However starting last week it was unable to resolve a lot of internet sites (e.g. opensuse.org). I can say it is working partiallyI tried restart the named service and it worked fine for only about 15 minutes and back to partial condition.All the records in zone files can be resolved. Only some internet websites not able to resolve. The same sites can be resolve with another dns server internally
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May 29, 2011
I have just installed Fedora 15 and while I can ping websites from the CLI I cannot access sites via my browser, I have installed it on my laptop and it is not presently connected to a network, just a single device connecting wirelessly via a home broadband line to the internet,
What entries should be made in my hosts.conf file, I have entered
Do I need to make entries in the nsswitch.conf file, At the moment it reads,
I have also checked the permissions on these 3 files and all users and groups have read permissions.
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Dec 13, 2010
I have debian lenny amd64 with two network cards. I have had one and when problem started to occur I tried installing second, but problem still appear.
Quote:
Quote:
I have tried dnsmasq to solve problem but I failed, and that is reason why 127.0.0.1 is there.
With first dns:
Quote:
Same is first time with dnsmasq, but then it gets cached.
My local network works perfectly, and I am writing this with remote desktop from some other computer.
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Apr 21, 2010
I have this ISP grade Nameserver running on BIND 9.5 on Fedora Core 9 64 Bit.
Its been pretty working well for sometime until a last week when we noticed it stopped resolving for our clients using on our service.
It gives correct authouritative answers for our own ISP domain with the A, PTR and MX intact but does not return resolving queries back to clients.
Below are my files
This is the message from /var/log/messages
The 41.223.x.x and 41.215.x.x ip address are from our ISP subnet and so are our own clients being denied.
The box is also hosting our traffic graph server which is on a LAMP but listens on another IP/ethernet card.
So far the load on the server is minimal as is a Dell R200 rack server.
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Feb 12, 2010
EDIT: The problem is more basic than dnsmasq. On testing to see if the nameservers are reachableCode:root@ps1:~# ping 218.248.255.146connect: Network is unreachablePost title pre-pended with [DO NOT REPLY] dnsmasq on a recent Slackware 13.0 install is not resolving. Usually dnsmasq "just works". I have tried all the problem analysis techniques I know and am stumped.
First the symptoms:
Code:
root@ps1:~# vi /etc/dnsmasq.conf
[code]...
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Jun 22, 2010
I'm having a strange problem on some of our Debian servers. It all started about three weeks ago when we moved our virtual environment (VMWare ESX3) from a SAN to a NAS (NetApp). At first I thought it had to do with that move but since the other 9 servers are working perfectly I eliminated that idea. For over a year all 12 Debian 5 servers have been working great without mentionable failures. All servers are (where) up to date with the latest patches. About three weeks ago I started having kernel panics with the following message on three of our servers:
Code:
Code: Bad EIP value
EIP [00000000] 0x0 SS:ESP 0068:f6d7da18
Kernel panic - not syncing: Fatal exception in interrupt and other times it looks like just a dump of hexadecimal data. The only difference between those 3 servers is that they have several mounted shares connecting to the NAS using CIFS. So I was thinking that it might have to do with an update of some kind in regards to smb. I recovered an image from a month ago, before the troubles began, copied over the data and MySQL databases and configured the 'old environment with recent data' exactly the same with MySQL master-master replication, document synchronization and load balancing. This task I performed last night (no other way since it's a production environment). Up to this time neither of the two 'restored' servers had a kernel panic. The one that has not been restored is having one at random about every hour and a half. Following are the different versions between the 'at this time' working server(s) and the failing one:
Code:
FAILINGWORKING
samba-common 2:3.2.5-4lenny122:3.2.5-4lenny9
smbclient2:3.2.5-4lenny122:3.2.5-4lenny9
smbfs 2:3.2.5-4lenny122:3.2.5-4lenny9
[Code]...
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Jul 14, 2010
My ip address is not resolving to the domain name.
I have checked etc/host reboot and all but it's not working.
I can't seem to find where to post my issue then I found you and you are on line
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Apr 30, 2010
I have a strange problem with wireless internet connection. We have 3 computers, 2 of them with Win 7 and 1 with Ubuntu 9.10 + Win XP.
Now if all three computers are connected to the internet through wireless router, the computer with Ubuntu 9.10 frequently fails to resolves hosts using various web browsers. I have to disconnect and reconnect to the router to get internet back but it only works for a maximum of 1 minute before it fails again. If the 2 computers with Win 7 logs out from wireless connection then the Ubuntu 9.10 machine works just fine for long periods.
If i boot with Win XP internet works perfect even when the other computers are connected but i really want to use Ubuntu 9.10. The wireless chip is an Atheros 9285.
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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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Jun 15, 2010
I had configured Squid in RHEL 5 and facing an issue with pinging. Not able to ping any website,hostname is resolving to ip address but not able to ping
[code]...
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Mar 8, 2010
I have a CentOS 5.3 box running Samba and OpenVPN. I have the Samba server setup as a WINS server and OpenVPN pushes the WINS server to clients when they connect. Everything is working great except for one problem. When I connect to the VPN using a Windows machine at a remote location, I can ping all the host names of computers on the VPN network no problem at all. However, when I ping the host name of the OpenVPN server it resolves to 192.168.122.1. All my machines are on a 10.x subnet and I have no idea where this ip is coming from. I've checked the hosts file, lmhosts, etc. and can find no reference to this 192.168.122 subnet.
I think I recall seeing this 192.168.122.1 ip when I had installed the Virtualization group and it created a virtbr0 network bridge with that ip. I've since removed the Virtualization software and deleted that bridge.
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Jan 15, 2011
I have a Windows 7 professional x64 pc that intermittently fails to resolve host aliases. The nameserver is a Fedora 11 system running bind 9.6.2-p2. Its cannonical name is trixter.intranet.org, and it serves several web sites, each with a different host alias: hg.intranet.org, svn.intranet.org, bugzilla.intranet.org, etc.
Occasionally, the Windows pc will be unable to find any of the aliased hosts, even when it can find the canonical name. The aliases will be un-resolvable for a period of several minutes, and then, with no intervention, they can be found again. Trixter can always resolve the aliases to itself.
Even stranger, when I use Cygwin from the problematic Windows 7 PC, it CAN resolve the hosts. I can ping hg.intranet.org from a Cygwin shell, but not from a cmd.exe window. Administrator privileges make no difference.
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Oct 16, 2010
So I've been reading around a bit, and have found a few fixes for this Resolving Hosts problem, but none of them have fixed mine yet. Basically what happens is all browsers fail to load pages, pinging local network works, but pinging default gateway doesn't. Cannot ping external websites and cannot reach update or upgrade servers for ubuntu. All networking works as normal on all other PCs in house, as well as the windows 7 boot I have on my ubuntu PC.
What I've tried:Disabled IPv6 completely by preventing the module from booting up Manually setting network settings instead of using the router's DHCP server Changing DNS servers from ISP to Google public DNS to OpenDNS Buying a new ethernet card And a few other things I can't remember off the top of my head, none of which worked. From memory, all this just started happening out of the blue. I recently changed from Windows to Ubuntu, and was enjoying the switch but all of a sudden I couldn't get on the internet on Ubuntu.
Now, I'm not sure why, but I decided to ping myself. Not my LAN ip, but our router's WAN ip. It worked, albeit took a little while to return a response the first packet, but each subsequent packet after that was a normal speed (~0.5ms). The strange thing about this was that I found that for a few seconds after pinging myself, I could access the internet. After a few seconds though, it returns to it's resolving hosts self again, which another self-ping would fix.
Consequently, in order to browse, I have an open terminal constantly pinging myself which appears to be working. Not ideal, and certainly not something I would like to keep doing for long, but it works for now. I really like Ubuntu, but if I can't get this net thing fixed, I can't finish moving over from Windows!
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Aug 9, 2009
After installing FC11 on my Mac Mini intel terminals, I noticed the network config GUI is completely broke, So I continued with a hand configuration.
Everything seems ok eth0 is up , it has the correct IP, DNS and default gateway, but browser quieries take forever to load.
E.g. if I type Google in the browser it takes about 20seconds before it loads the page.
To add insult to injury, I have a 16Mbit/s Down 2.5Mbit/s uplink. the other 10 or so rackservers on the network responds fast, so it is nothing to do with the network or connection. They all run FC7-9.
The problem is squarely with FC11 and must be some bug not reading or resolving DNS correctly.
Anyone have an idea how I can figure this out with FC-11.
It seems to be the worst FC distro.
I generally was happy with all FC6-9, but 11 really sucks (the ppc version wont even install on my ppc terminals)
That the Mighty Mouse Wireless, worlks out of the box is very nice though, but that is all.
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Oct 31, 2010
I have recently purchased a VPS, i want to make the VPS act as domain name server for few domain names which i have purchased in the past, so that i can update DNS records for those domain names from my VPS. I know bind9 can be used for domain name servers but i dont know how use it in mycase.
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Apr 22, 2010
Does anyone have a acl patch for cvs-1.11.22-5.el5.I need to implement rw acl on branch and tag names.
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Dec 13, 2010
So I'm looking to host potentialy three different...sites...I want to call them from the same machine. One is a radio station and the other 2 are just straight websites. So I wanted to know if I had to use different machines to accomplish this or can I alter maybe the http conf file or what. I did find this in the forums but wasn't quite sure if this applied to me. [URL="http://www.linuxquestions.org/questions/linux-software-2/serving-multiple-domain-websites-on-one-server-329914/"http://www.linuxquestions.org/questions/linux-software-2/serving-multiple-domain-websites-on-one-server-329914/[/URL]
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Jun 14, 2011
BackgroundI have registered a domain name "abc.mobi" with domainit. abc.mobi is pointed to our mail server which is running at 199.2.2.2 (fake address).All mails that are being delivered to kazmi@abc.mobi have no problem getting delivered. We can also send emails out to other domains.I have recently configured BIND 9.3.6 on the same server (running CentOS) that is running our mail server. The purpose is to make sub domain dynamically without getting domainit involved. These subdomains will have incoming and outgoing emails as well. For example, I would want to make a usable subdomain "xyz" under abc and have kazmi@xyz.abc.mobi email address.
I have configured abc.mobi.hosts file as follows
(/var/named/chroot/var/named/abc.mobi.hosts)
$ttl 38400
[code]...
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