Fedora Networking :: Resolving Host Names To IP Address ?
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, 2011
I am using Fedora 7 in my server. Currently windows server 2003 (Active Directory integrated with DNS) is running. I want to switch my DNS to Linux. In my small organization there are only 20 users using static IP address and the IP are mostly permanent. so should deploy name server or I just populate eateries in /etc/hosts file ?
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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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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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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 7, 2010
can any one post the "Java Program to Display IP Address and Host Names in Wireless".
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Feb 25, 2011
"Java Program to Display IP Address and Host Names in Wireless".
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May 10, 2009
I want to use single label host names on my local LAN, without using any domain (at least no registered one). My machines should be named in a fashion similar to 'myserver', 'mydesktop' etc. so that i from a browser on any LAN machine may write 'http://myserver', and get the webserver on 'myserver' (so NO domain part, e.g. myserver.domain).
Do i need to create a DNS zone for each host or is there a way to put all host in a single zone, if so; which? Would such a name be considered a root domain?
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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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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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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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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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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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May 29, 2011
when I'm in my campus I saw things like this from tcpdump:
client-64-15.department.univ.edu
client-x-y.department.univ.edu
gw.nettokurabu.univ.edu
and my laptop got a name like that too (x and y being last 2 segments of the IP)out of curiosity, how to assign names like that to each IP? well, the names are not in dns records (can't resolve them to IPs)... when I set up (illegally) my on subnet with a routing software the addresses I used also already have their name without me configuring it before...
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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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Dec 19, 2009
Is it possible to have one static IP address with a NAT network forwarding each domain name to certain internal/DMZ IP addresses? I know you can do it by port but if both websites are on port 80 can you forward to the corresponding server on the dmz.I ask this because I noticed the website braemere.com.au had to be typed into a web browser and entering the IP which is 202.47.5.7 did not take me to the website.
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Jun 22, 2011
I'm building a replacement service, and in the not to distant future, I'll need to change the host name and IPs (ipv4) (I'll also be doing this on the fedora 10 box I'm replacing)
I can look around and edit a bunch of files to make it happen, but there has to be an easier way.
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Jun 15, 2010
Since two days i m not able to browse websites using the domain names but able to ping/browse using IP addressed. I have done the following:
1. Using wireless i m able to get IP address of DNS (8.8.8., Gateway, localhost & router ip address
2. Disabled wireless and connected ETH0 but still the same problem
3. not able to edit resolv.conf
sudo gedit resolv.conf
** (gedit:4179): WARNING **: Hit unhandled case 0 (Error opening file: Input/output error) in parse_error.
[code].....
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Oct 17, 2010
I am setting up a server, with a static IP address. I thought I did the setup correctly, including setting up the static IP address. When the system restarted, I saw a message flash about some other host already uses address 72.86.26.xxx
Then, once logged in, I got a system message: System is not receiving updates, check network connection.
I went to System: Network Configuration, and under Devices, I saw:
Inactive Device: eth0
I clicked on activate, and I received the same message: some other host already uses address 72.86.26.xxx
The file /etc/sysconfig/networking/devices/ifcfg-eth0 reads:
#realtek Semiconductor, Ltd. ...
DEVICE=eth0
BOOTPROTO=none
BROADCAST=72.86.26.255
[Code]....
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Feb 3, 2010
This is a fun one (x used in place of real IP's and hostnames):
Code:
$ host 134.174.xxx.xx
xx.xx.174.134.in-addr.arpa domain name pointer xxx.xxx.xxx.com.
$ host xxx.xxx.xxx.com
[Code].....
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May 25, 2010
What is the command to show the host name of the ip address?Suppose, I've an ip address like 209.191.122.70, now I want to know its host name.What is the command for that?
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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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Mar 8, 2010
I just installed a dual boot XP/Debian 5.0.4 setup on my Dell 5100 laptop. I now have constant problems with "resolving host" when using Debian. The connection when using a browser or downloading is noticeably slower than when using Windows or my Ubuntu install on my desktop. Also, whenever using the Debian install on my laptop, both it and my desktop, which both connect through the same Linksys router, constantly show "resolving host" (Chrome browser) until it just timeouts. Rebooting the DSL modem sometimes fixes it for a while (although it's still slow even then), but it eventually happens again. Turn off the laptop/switch to the XP OS on it, and the problems disappear on both the laptop and desktop. Is this a known problem for Debian 5.0.4?
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Nov 6, 2010
We have Verizon as our ISP with a dynamic IP address. We published our website but the IP changes frequently. How can we set Network address translator(NAT) so our website can be published regardless of IP changes? We don't have domain name and have no intention for one.
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Jun 7, 2010
I have UcLinux embedded linux. Hostname is updated in that machine. when I try to capture with MAC scanner tool the host name is not showing only IP address and MAC address is showing.Some IP phones are connected in the same network by which the hostname is shown in MAC scanner tool.how to go ahead to achieve the host name in the MAC scanner tool.
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Mar 17, 2011
A brief description of my network:It is a small home network consisting of an Ubuntu 10.04LTS server edition, an Iomega ix2 NAS, a WinXP pro server and several family laptops.This is all routed through a Netgear WNDR3300 home router. All are assigned IP's via DHCP and all but the laptops are static (via DHCP though). The WAN address/DNS is assigned via DHCP from my ISP.The problem:When one of the machines is offline, Ubuntu does not resolve the netbios name correctly. No surprise here. But what is happening is that it is finding some arbitrary machine on another network. Below is what a ping to an offline host reveals:
Code:
ping -c3 hostname
PING hostname (204.232.162.92) 56(84) bytes of data.
[code]....
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Jan 27, 2010
Is there any one know how to deploy a remote OS installation for a host with public network address? In a LAN with private network, we can use PXE, kickstart... but what we could do with the hosts have only public ip address?
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