CentOS 5 Server :: DNS Does Not Resolve Names Except To Localhost
Feb 9, 2010
We installed CentOS 5 at our school and are attempting to get 2 simple DNS servers online. These are simple name resolution servers for our network. We installed the needed caching nameserver packages via Yum and all seems to be well, but for some reason when the server is online, it fails to resolve DNS records except when we direct the requests to its 127.0.0.1 (localhost) interface. As for the server specs, the DNS server is running on a Virtual Machine, and the ESXi server has 2 quad-core Xeon CPU's with 48 Gigs of RAM (in short.. hardware is adequate.)
Here's more details:
When the box boots up, we can confirm that the named service is running and it resolves DNS records when we direct queries to its localhost address:
[root@ns1 ~]# dig hotbot.com @localhost
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> hotbot.com @localhost
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55510
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 0 .....
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> hotbot.com @66.186.176.2
;; global options: printcmd
;; connection timed out; no servers could be reached
What would cause the Named service to not answer DNS queries from the physical IP but only from it's internal IP?
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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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Sep 3, 2009
I have an RHEL5 server running BIND. I'd like to be able to resolve internal, non-FQDN names such as "wiki" for the company internal wiki. in my named.conf file...Named-checkzone returns no errors, and nslookup works when specifying the server explicitly, but no browser resolves the name when entered in the address line. I know this by no means a standard use of BIND, but I'm sure someone out there's pulled this off. I did see when googling someone suggest "load the root zone (.) as master, and add your "hosts" as TLDs, using CNAMEs", but tried that and probably did it wrong since it didn't work.
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Jun 7, 2010
I configured my dns server running on redhat5(test.com, ip-192.168.10.1), all is working perfect on the server its-self and on the client machine(xp), it cant resolve the name [url] but can resolve when i use [url]are ok, nslookup displays the following error:
The reverse is working fine from the redhat machine, NO firewall on the client xp machine xp as host name is added in /etc/hosts
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Sep 25, 2009
php can't connect mysql by 'localhost' but can connect by IP address:
[Code]...
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Mar 10, 2010
the custom-yum.sh script (or, whatever you say ) below:
#!/bin/bash
## Mounting CD/DVD ##
echo "Mounting CD/DVD in /media"
mount /dev/hdc /media
[Code].....
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Aug 23, 2009
I have installed bind from the repos and am trying to setup a caching name server. After copying the stock name-cachinging.conf to named.conf, I tweaked named.conf to reflect my LAN:
options {
listen-on port 53 { 127.0.0.1; 192.168.1.102; };
listen-on-v6 port 53 { ::1; };
[code]...
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Sep 16, 2010
A while ago I downloaded a VMWare VM for 7.10. I then upgraded it to 8.10 and it was working just fine. I just did the upgrade to 10.04 and I'm having problems with my networking. The really odd thing is that I can ping machines on my local network and out on the Internet by IP address but it will not resolve names using DNS.
I've got the network set up for DHCP. I also tried DHCP address only and manually entered my DNS server addresses but still no luck on resolving names with DNS. At the end of the day, I don't really care if I get this fixed or just get a new VMWare VM. (I can't create one because I only have the player.)
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Feb 14, 2011
I have setup an static IP on this server, it will ping internal sites , but when I try to browse the internet it does not do anything. I have set up the gateway, the firewall, and the domain fie, but still no luck.NOTE: When I try DHCP it will work ( it will resolve the DNS of the pages), but since this is a server it requires an static IP.
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Mar 21, 2011
I installed bind & did not install chroot. I set up a fictional domain kelly.local. I am able to resolve FQDN (example: angus.kelly.local) in both dig & nslookup & ping on linux boxes.
I want to be able to resolve bare host names (example: angus) using bind. I get mixed results.
(1) linux boxes resolve bare host names & FQDNs just fine using nslookup & ping, but not dig. dig gives error:
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_5.3 <<>> angus
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 15241
[Code]....
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Jun 16, 2010
I have a windows PC and a fedora 13 linux box. When connecting to the linux from windows, I'd like to type the hostname instead of the ip address. Apart from setting the hostname, what do I have to do to publish my hostname on the intranet. (set up a nameserver?)
Though hostname works on the linux box, even this fails: nslookup myhostname Also I'm a newbie. I've tried installing some packages like samba and dhcp, using yum...;service chkconfig... and then checking whether nslookup or nmblookup work with my hostname. But it's just guesswork. Under system -> Administration there is no network option. but it is not clear what package is needed to install it, or whether such a thing is supported in fedora 13. I did try system-config-network, but it has few options none of which pertain to hostname resolution. The fedora manuals dont seem to cover it, at least in recognizable plainspeak to me.
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May 22, 2009
I have a fairly simple iSCSI setup using two devices, but they have swapped names on different machines. running CentOs 5.3 ia64, and using iscsi-initiator-utils-6.2.0.868-0.18.el5
vm1:
[root@vm1 ~]# fdisk -l
Disk /dev/xvda: 4194 MB, 4194304000 bytes
255 heads, 63 sectors/track, 509 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
[Code].....
Any way to get iSCSI to mount the devices as consistent device names ?
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Jul 11, 2011
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Jul 25, 2010
I have three Debian systems running, along with several XP laptops, PS3 and two DirecTV systems. I use two of the three Debian systems as media servers, and the third is an older system mostly for playing around with. My home network is running fine with the following nuisance. The two newer Debian (Lenny) systems are <barney> and <mitzi>, the older is named <oscar>, running Debian Sarge 3.1. From either locally or remote login to <barney> and <mitzi> I can ssh into either of the other two systems, however when logged into <oscar> I cannot ssh by name to either of the other systems. e.g. ssh: mitzi: Temporary failure in name resolution..However, from <oscar> I can ping outside my network (e.g. ping www.google.com) with no problems.I can also ssh to the other systems via IP address, just not by name.
I've compared the /etc/ssh/ssh_config, /etc/resolv.conf, /etc/ssh/sshd_config and other files between the two systems and not seeing anything peculiar. arp, route, etc., don't show different behavior between the systems either.
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Apr 16, 2010
I'm new here, so please be gentle! I recently installed F12 64 KDE on my Acer Aspire 1810TZ, could connect to the WLAN router but neither the native Konquerer nor Firefox could open any pages...
resolve.conf has the DNS according to DHCP offer, from command line dig properly resolves the name, ping (e.g. google) works, telnet to domain-name on port 80 works, GET too. When using the browser with the domain-name I tells me "Server not found", tcpdump doesn't display any activity. But when I manually change the domain-name with the IP (received by command line dig) then the browser has no problem how do browsers interact with the network resources of the OS?
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Mar 27, 2010
I'll apologize in advance for I'm sure this has been covered already, but I'm not sure of the search terms to even use to begin solving this problem. I don't know what I don't know.
I have three computers on my home network and want to reach them by their name instead of IP address since their ip is dynamically assigned. I'm using a Linksys WRT54GL router and have noticed that there exists a "DHCP Clients Table" in the router that seems to hold all the necessary information - host names and ip addresses.
How can I get my computers to use that as the lookup table to resolve the host names? And is this even an optimal way of being able to resolve local names?
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Oct 2, 2010
After upgrading my ubuntu server from 9.04 to 10.04, the window computers couldn't resolve samba shared names anymore, the error code displayed by Windows was 0x80070035.
I was using the ubuntu server as a samba server, using 'share' as the security authentication method, it has been working very well under previous ubuntu versions but, after upgrading to 10.04, the windows computers can't access the server shares anymore; the linux computers don't have any problems (I can access the shares from linux).
As a workaround, I've added the name of the server in c:windowssystem32driversetchosts; but I'd like to know how to fix the problem without modifying every windows computer.
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Apr 20, 2011
I am confiuring DNS on CentOS 5.4 but unable to resolve.The configuration files and output of commands is given below.IP Address=192.168.0.66
/etc/resolv.conf
nameserver 192.168.0.66
nameserver 127.0.0.1
[code]....
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Dec 2, 2010
I have an internal domain (dev.lan) for which my Ubuntu server is authoritative. We have a number of subdomains under that domain (test.dev.lan, svn.dev.lan, etc.). The server also acts as the primary DNS server for my office. It was originally set up under Ubuntu 8 and worked great.
However, ever since we upgraded to Ubuntu 10, our Windows clients periodically lose the ability to resolve domains on the dev.lan domain. Internal IP addresses can still be pinged from the Windows machines so it does not appear to be a network-connectivity issue. External domain names continue to resolve without any problems. The only workaround is to restart networking on the Windows clients. It's frustrating because it happens several times a day.
bind9 logs no obvious error messages.
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Jul 27, 2010
I'm getting this error.
Basically this is what's happening. I can receive mail in my Maia Mailguard everything works fine.
However in my Spam Cache if I were to get an item say that was not meant to be spam and I try to release it so it goes into my inbox I get this error (see below)
Now I'm trying to figure out where I would give it permission to connect to that IP?
On a side note the error has an IP of 192.168.96.30. With that IP I get a connection refused error
If I were to put Localhost it gives me an error of "Could not find Network_addr"
So I'm trying to figure out what this error means and why I can't release any kind of spam to enter my mail box?
I think it has something to do with the way it is connecting to my exchange? or MySQL?
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Oct 8, 2009
I have to rename a group of machines in my little samba domain (tbd backend) but there is an ugly bug that makes this impossible. have set 'rename user script' variable corectly, also checked all configurations.When i change computer name in my windows box, it shows an error saying something like "Error calling remote procedure"Looking on server side, username for the machine gets correctly changed in /usr/passwd, and also in samba database.But samba log says:
===============================================================
[2009/10/08 11:10:32, 0] lib/fault.c:fault_report(42)
INTERNAL ERROR: Signal 11 in pid 11052 (3.0.33-3.7.el5_3.1)
[code]....
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Nov 16, 2010
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Mar 9, 2010
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Sep 5, 2009
$mysqladmin -u root
just prints out a long option list and quits... sometimes it tells me that I cannot connect to localhost.... I've tried --no_defaults,--socket= etc. as per the MySQL manual.
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Feb 13, 2010
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I do have a registered domain name which the hosted site runs under
the domain name for my centos 5.4 server is localhosthost.localdomain.
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Mar 13, 2009
it was not working and ping is not reply me and I add ifconfig lo 127.0.0.1 it is working and getting ping but when reboot it is lost setting how can I set it for always ping working.
PING localhost (127.0.0.1) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ifconfig lo 127.0.0.1 later
[Code]....
now working but IWant reboot later working about same. how can I setting it boot start this .
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Jun 1, 2011
I'm having difficulties with ntpd on my CentOS 5.6 install.
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remote refid st t when poll reach delay offset jitter
==============================================================================
+ntp.networking4 193.67.79.202 2 u 1 64 377 35.652 47.102 12.349
*deepthought.doc 131.188.3.223 2 u 2 64 377 29.010 44.358 11.585
[Code]....
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Jul 12, 2011
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