Software :: Server Unable To Resolve Outside Address After Internet Cut Over
Jul 6, 2011
Centos 5, After switching out server to another provider the website responds as it should but the server is unable to establish connections to remote servers. Yes the internet connection is fine, I'm actually working on the server remotely.
--- 4.2.2.2 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 2999ms
/etc/resolv.conf has opendns nameservers
nameserver 208.67.222.222
nameserver 208.67.220.220
search localdomain
and I've updated /etc/sysconfig/network to reflect the new IP address.
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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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Nov 17, 2010
I have an odd thing going on with DNS. I have two machine's running Ubuntu and for some reason they do not always resolved internet addresses on my Internet connection. This has gone on since the Ubuntu 8.04 when I first started using Ubuntu. Anyway, I use OpenDNS' DNS servers and I have been running perfectly.
This is what is odd. My Windows XP Machine never has the problem. It always resolves. Does Windows Possibly have some Microsoft hosted DNS server hard coded in there as a backup? Things are working fine this way so I am not looking to change. I am just a little puzzled and finally got around to asking, "Why is this".
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Jul 17, 2010
when tring to install (AssaultCube, UrbanTerror) i get this: unable to resolve host address `dls.urt.voxel.net'
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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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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 10, 2011
I have installed Linux 5.6 in my home PC, i tired to use internet connection its failed to connect. Whereas i am able to work in windows XP.
In Linux:-
i am not able to ping any sites.
i am using BSNL Broadband connection.
i have enable the option DHCP (IN DNS Configuration) to obtain an IP automatically from the ISP.
/etc/resolv.conf file looks like
search localhost
nameserver 192.168.1.1
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Feb 17, 2011
In firefox you can type ubuntuforums and it will bring you here via a google query.Mines stopped working the address bar goes to http://ubuntuforums/ and I get a forbidden page.I've check about : config and all is set fine
Code:
Keyword.enable = true
Keyword.URL = http://www.google.com/search?ie=UTF-8&oe=UTF-8&sourceid=navclient&gfns=1&q=
[code]....
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Sep 10, 2010
I have recently downloaded and installed ubuntu 10.4, and I am finding it impossible to connect to the Internet.
I connect to the Internet through an Ethernet cable. My university (Tuebingen, Germany) provides the Internet through this server:
http://10.196.128.11/upload/custom/green/welcome.html (English link).
When I open my browser in windows vista (I have a duel-boot system), my browser (Firefox) automatically goes to this page, and I log in, and am able to then use the Internet.
Ubuntu also searches for this 10.196.128.11 server, but it continually states "waiting for server to respond". I have checked all the settings I could find in windows and compared them to the ones in ubuntu, and they seem to be identical to me. I am using firefox in ubuntu too so I cannot understand the problem.
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Feb 1, 2011
Is there away to resolve the hostname after creating a new subdomain. So we don't need to wait internet need some times to able to resolve the hostname. For example, if I add new subdomain to "test.example.com", I can directly ping to this hostname from internet.
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Jan 18, 2011
I have set up DNS server set up on my RH 5.5 system. It is working perfectly as Caching only Server but but when i tried to make it a primary server for a zone it didn't resolved. I am actually a newbie so please correct me if i am wrong somewhere. Here are my configuration files code...
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May 5, 2010
we are trying to install this NIC Rosewill RC-400 Chipset RTL8169S-32 in Ubuntu 9.04 we downloaded the drivers from Rosewill website (For kernel 2.4.x and 2.6.x V 3.1) but when we follow the instruction in the readme file and do make clean modules and error comes out
Code:
make -C src/ clean
make[1]: Entering directory `/home/trinity/Desktop/r8169-6.006.00/src'
rm -rf *.o *.ko *~ core* .dep* .*.d .*.cmd *.mod.c *.a *.s .*.flags .tmp_versions Module.symvers Modules.symvers rset[code]...
So I went do realteak downloaded latest available drivers that seems to be were release yesterday did same command and same error So I made only make and it went fine did then make clean modules and went fine so made make install, depmod -a and modprobe r8169 verify int was up and getting correct ip from router but I'm not able to access the internet or ping any IP address
Code:
xxx@xxx-desktop:~$ uname -a
Linux xxx-desktop 2.6.28-18-generic #60-Ubuntu SMP Fri Mar 12 04:40:52 UTC 2010 i686 GNU/Linux
xxx@xxx-desktop:~$
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Nov 15, 2010
There seems to be some problem in my dns server.
The configuration is perfectly ok.But what happens sometimes is,
it couldn't resolve some domains sometimes.After restarting the
named,it again resolves the domain.
whats happening on my dns server
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Jun 29, 2009
I have a problem with sftp login to a Ubuntu server. sftp works for root, but not for other users.
ssh works as usual and for all users. code...
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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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Feb 28, 2010
I have squid on my RHEL5 server and a no of windows clients ,on clients some sites opened without any error but some sites whilw opening says unable to resolve hostname ,why this kind of problem ?This may be DNS problem ,but it should happen for all address not some .
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Jul 14, 2011
This morning it would not boot; when I tried to wake up the system, it gave me a bunch of errors, the last ones being as follows: "mount error: could not resolve address for servername: No address associated with hostname mountall: mount /media/shares [1402] terminated with status 1" I am writing this in Win 7 since I lost ubuntu. I am using ubuntu 11.04.
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Jan 18, 2011
I have setup a home based web server to host a photo blog for myself and my friends. I will be running wordpress and possibly a phpbb3 forum. I'd like to open this to discuss server administration, server setup, and server maintenance. However, I have a pretty good start on all of those but serving a domain name to my static ip. Here my static ip is 24.10.202.144. I registered a domain through [URL]... It appears that I have the domain working to forward to my ip. However, I am still getting this output file from apache.
[code]...
I have tested the domain name across a few different computers on different ips. It works appropriately. I just want to make sure I have it set correctly on the (apache) server side of things. Then I can get more into Zone Editing etc.
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Jan 10, 2011
i am using ubuntu 10.04 and unable to access following address http://202.164.53.122/
Even all my friends can access it from their own computers,you can also access it i hope so,only i am not able to access it .After showing loading of page for 10 sec ,it say Unable to connect.
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Apr 23, 2010
I have little to no understanding of this system. I am currently setting up for a work from home job that requires I use a disk in my CD drive when booting my PC. I believe this disk runs an ISOLinux operating system.
The system appears to boot properly; however, I am receiving an error that states "No Address Found" and I am unable to get an internet connection. When running Windows Vista, my ethernet connection runs fine. I'm sure I am missing one small piece of the puzzle that will make this work.
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Jan 29, 2010
I just installed Fedora core 11 and am trying to get httpd to start, but it gives me a [failed] message. When I run it with -e DEBUG, I get an error message like: "failure in name resolution, unable to find IPv4 address of 'uaserver'" In the httpd.conf I have my hostName set to localhost.
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May 28, 2010
I have to build a netwrok for small lab and office setup.Setup as belowI have a PC running with Centos 5.4 and has 4 NIC cards. eth0, eth1, eth2 and eth3
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Feb 18, 2010
Ubuntu Server 9.10, with apache, proftpd, mysql and the goodies.
I have wordpress installed and setup under /var/www/
The LAN IP address resolves perfectly to the index.php
However I can not get my WAN IP to resolve. My ISP blocks port 80, so I have my router setup to forward port 81 externally to port 80 of my server. I know the port forwarding is setup correctly and working, because I can go to websites like url and test that port 81 is indeed open.
I also have DynDNS setup on my router and through an account with them, to update my IP address with any changes, to a host name. But because port 80 is blocked I have to access it with, host.name.org:81. Ive had this system up and running before with no issues. Now I can not get the host.name.org:81 to resolve.
Neither can I get my ip address xx.xxx.xx.xxx:81 to resolve.
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Jul 26, 2011
I just changed my CentOS server from DHCP to static IP address. After the change, I cannot ping other hosts on the same subnet. (I can ping the CentOS itself).The IP address of CentOS is 192.168.0.202.After pinging 192.168.0.106 (106 is on and other host can ping it), arp -a shows? (192.168.0.106) at <incomplete> on eth0 It looks ARP cannot resolve MAC address of hosts 192.168.0.106.
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Oct 25, 2010
Here is a glimpse of my IPTABLES
http://pastebin.com/WvHAC46A
I see in the column of sources the addresses being resolved to domain names is there a way I can stop this?
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Aug 5, 2011
On the server having live ip address, I have installed vnc server using:
yum install vnc-server
yum groupinstall "X Window System" "GNOME Desktop Environment"
yum install xinetd vnc-ltsp-config
/sbin/chkconfig xinetd on
/sbin/chkconfig vncts on
/sbin/service xinetd restart
On my local machine connected to internet via LAN, I have installed vnc viewer using: yum install vnc When I connect to the vnc server using vncviewer ipaddressofvncserver:1 it shows unable to connect to host. No route to host (113)
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Apr 26, 2010
I installed a Fedora 9 server. I can download use wget or ftp but I cannot browse the Internet using build Firefox/Mozilla.
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Jan 17, 2009
I've installed centos 5 on an old computer with success and it works great.I can access the web server hosted on the centos server from any computer on the wireless and wired local network. I can also use ssh (putty) and nx client from any computer on the local network (wired and wireless) to access the centos server.On the wireless router I've configured a port forwarding to the wireless network interface on the centos server. I can access the centos server from the outside (internet) through this port forwarding both through http and ssh or nx client.MY problem is that I can't access the centos server from the internet through the wired network interface. Any attempt to view a web page or login with ssh or the nx client will timeout.
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Sep 4, 2009
I hv Cent OS 5.3 installed as server. I hv a network of approx 100 desktops and laptops. For a security purpose i want to block certain laptops from gaining a the network access using dhcp. Can we block the ip address leasing if a specific MAC address request for a ip lease?
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Aug 4, 2011
If I give "ifconfig" in my laptop I get eth0,lo,wlan0.In that where do I find my Ip address in Ubuntu in 10.04. In eth0 I dont find inet address.Where can I find it?
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