Ubuntu Networking :: Windows Can't Resolve Lucid Hostname

Aug 22, 2010

I am currently facing one issue with my network. I have several computers and this is what happens, everything works fine when I use the ip address, but when it comes to hostname.

-Windows computers can't ping/see the computer 5 (while it is running linux), but they can see computer 3 while running ubuntu 8.10 and computer 2 while on Mac OS X.

-computers 2 and 3 can see/ping everybody while on Mac/Linux.

-computer 5 can ping everybody.

-computers 1, 2, 3 and 4 (on every OS) can see/ping computer 5 while on windows xp.

Basically, the problem is with computer 5, it can see, but it is not seen by other computers (just when running ubuntu lucid)Computer 5 is supposed to be a printer server, so it must be seen by the others regardless of OS.When I ping computers 5 the TTL is 64, when I ping other computers, TTL is 128. I don't think this means anything, but I am not sure.Initially I thought this was a printer issue, but then I realized is something related to network when I tried to use ping/explore the computer 5 by ip/hostname (it works by ip, but not by hostname).Computer 5 is sending the hostname to the router properly, it appears in the dhcp client list.

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Ubuntu Servers :: Can't Resolve Hostname From Windows

Mar 3, 2010

I have two computers.

Computer A = windows 7.
Computer B = Ubuntu Server 9.10

Computer B automatically receives an IP address from my router.

I can ping computer B from computer A using the IP address. I cannot ping computer B from computer A using its hostname.

My router did not show a hostname under it's active clients table. After some searching I found a threat where somebody suggested modifying /etc/dhcp3/dhclient.conf and adding 'send hostname "blahblah"' This allowed me to see the hostname in my router but I still cannot resolve it from my windows box.

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Ubuntu Networking :: Can't Resolve Hostname For Ping - Ssh ?

Jan 7, 2011

I have a weird problem since yesterday that I can't solve. I can't ping / ssh my machine anymore using its hostname... says "unknown host", "network unreachable". I have no idea why - it used to work perfectly. I can still ping / ssh using the IP so it must be a problem of hostname not being resolved.

I have a dynamic IP (I'm at work...) but that doesn't seem to be the problem - network manager automatically adds a line in /etc/hosts with <mycurrentip> <hostname> (I checked, it's indeed the IP given by ifconfig and that I can use to ping/ssh).

2nd question: Another computer has a similar problem but slightly different: the hostname is resolved but points to a wrong IP (seen in ping or nslookup), different from what ifconfig returns. As a result, ping times out and ssh says "no route to host".

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Sep 24, 2009

I am trying to mount a NAS device using the hostname on my linux computer (running slax)

The command I am using is
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i am getting back the error
mount error: could not find target server. TCP name hostname/sharename not found
No ip address specificed and hostname not found

I can do this mount from an older version of SLAX but i can't from this new version. smb:/ can find then through the file explorer window but I can't mount them from the command line.Is there something i am doing wrong?

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[Code]....

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Networking :: Ubuntu Server Cant Ping Or Connect External / Can Resolve Hostname And Domain

Oct 15, 2009

As the title suggest, I have downlaoded the latest copy of Ubuntu Server from the ubuntu website.Everything installed fine. DHCP configured ok as far as I can tell. I can ping other machines on my network (which are running Windows) and they can ping the Ubuntu machine and conenct to Apache which is running on it.If I try to ping google.com or any other domain, it gives the correct IP address but gives no response to any pings, dont telnet on port 80 (or any toher potr for that matter) on any machine on the internet. I checked the settings using ifconfig to see what DHCP had assigned, and they matched the windows machines configuration (other than the IP address obvisouly). I tried assigning a static IP, even reserving a particular IP for my NIC.

Whatever I do, i cant connect to any machine outside the network via IP or domain.I have searched everywhere and tried everything i can find on the net but still to no avail.The Windows machines are part of a domain called alcom-uk.local and run off of a Windows Small Business 2003 Server. Not sure if i need to manually setup Ubuntu to connect using a domain or anything.

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[URL]

They all come back with: ssh: Could not resolve hostname 127.0.0.1: Name or service not known. I never actually tried this before upgrading so I'm not sure if its caused by the upgrade, but I would like to get this fixed. Also, ping with all of the above hostnames fails as well. I can SSH in from other computers and I can SSH out from the server. For whatever reason, I cant SSH from the server to the server though.

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I have a windows 7 desktop hardwired to my wireless router and a windows xp laptop connecting wirelessly on the same network. I am able to ping the windows 7 box by its ip address but unable to do so by its hostname. This is very inconvenient since I would like to set up a share by hostname (doesnt change) and not by ip (changes occasionally since its dhcp).

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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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Fedora Networking :: No Hostname On Windows Workgroup?

Mar 8, 2009

So everything seams to be fine on my F10 boxes networking. I can ping computers on the network with both LAN IP addresses, and their hostnames. However, I can only access my F10 box with a LAN IP. In windows, I go to view workgroup computers... only the windows systems. If I go to the F10 system with samba via the IP address it works fine, just can't get to it with a hostname.

I'm wanting a static IP of 192.168.1.22. And on the windows workgroup "workgroup".

I'm new to doing things with linux that are remotely difficult... and well, this has proven to be. I can't work out if this is a SMB problem, general networking...

smb.conf (I've ommited the top info segment due to forum character limit, as well as the SELINUX notes)

Code:
#======================= Global Settings =====================================
[global]
# ----------------------- Netwrok Related Options -------------------------
#

[Code].....

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Jan 3, 2010

I have a network of 2 WinXP machines and one linux box. I have fiddled around with the settings as you do when learning. The network is working. The network neighbourhood on the WinXP machines recognise the linux box and vice versa, (the linux Places|Network recognises the 2 WinXP). I can Ping the linux box using its hostname from a WinXp. But I cannot do the reverse. I get an 'unknown host' response. I can ping the linux to itself using its hostname.

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Nov 21, 2010

I am using a Dell Latitude D610 that is a few years old, and running Fedora 13. I do not think hardware is too relevant to my problem, nor is it an issue with my OS itself. I do not dare perform an upgrade to Fedora 14 at this point because this is an active work machine, for school use. To the heart of the problem, I am extremely irritated by the erratic behavior of Epiphany Browser (and just an hour ago, Midori). If I open more than a few pages at once (e.g. ctrl-clicking a bunch of Google search results) more often than not I get a chain of "cannot resolve hostname" blank tabs.

Oddly enough, I refresh the pages (one by one, of course - I don't know how to mass refresh) and they load properly! The problem is more prominent on Wikipedia - most articles have images embedded here and there amongst the text. When I visit the page, none of these show up - the page loads, and after I see the blue mercury-looking progress indicator shoot to the end, the spaces where the images should be are blanked and in the centers lie a little thumbnail of a grey photo with the corner turned up - e.g. generic-can't-show-the-image.

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I double-space between my paragraphs by accident and when I make a mistake in my typing I often suck myself into a cycle of mistakes. E.g. "Polanrd" --> "Polan" --> "Pol" --> "Pold" (hitting backspace twice to trim off "rd", but Google Docs redoubles the keystrokes into four backspaces and I end up taking off too much and adding the lone "d" in the wrong place). The problem shows up to a lesser extent in the built-in chat, wherein backspace is not affected, but every time I hit "enter" my chat appears twice (as though I had hit enter twice).

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Ubuntu Networking :: Hostname.local Addresses On Windows (using Dnsmasq)

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I'm trying to get the Windows machines on my network to access hostname.local addresses. I want to do this without setting up extra software or settings on the Windows computers.

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Ubuntu :: Unable To Access Samba Share By Hostname / Resolve This?

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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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CentOS 5 Networking :: PING From 5.5 To Windows Hostname/NETBIOS Name?

Jan 28, 2011

Givens

LAN
CentOS 5.5
Windows 7 machine (hostname/NETBIOS name: AwesomePC, LAN IP: 192.168.1.20)
Workgroup: Cake
No WINS server
No Domain
No AD

Goal

From CentOS 5.5, have

# ping AwesomePC

resolve to a ping on 192.168.1.20

Problem

# ping AwesomePC

resolves to some random public IP that seems to be coming from my WAN DNS (openDNS) servers

ATTEMPTS

Have edited /etc/nsswitch.conf, edited line: hosts: files wins dns Have edited /etc/resolv.conf, added line: search CAKE Have installed samba (# yum install samba) and run (# service smb start), with /etc/samba/smb.conf, workgroup = CAKE, name resolve order = wins host lmhosts bcast

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Ubuntu Networking :: Pinging Hostname Rather Than Hostname.local?

May 24, 2010

I'm trying to ping another Ubuntu computer on my local network. If I try doing,ping <hostname>then I get the messageping: unknown host <hostname>however, if I doping <hostname>.localthen I get a response back. I was wondering how I can change it so that I can ping without having to append .localI've installed winbind and modified my /etc/nsswitch.conf file but this has made no difference.

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Ubuntu Networking :: Hostname Changed But Email Still Using Old Hostname?

May 22, 2011

I have an ubuntu 10.04 server with hostname "abc.domain.com". However, due to migration, we had to change to hostname to something else, "xyz".

I have done changing /etc/hosts and /etc/hostname and run /etc/init.d/hostname start.

Checking the hostname and all shows it is now using hostsname of xyz. However, email sending out is still using old hostname. We have some scripts that will send out alerts like failed rsync or hdd space full to my email account. But I see the sender is still "root@abc.domain.com".

How do change that to xyz? I am using postfix. I have edited main.cf and restarted postfix but no go.

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Jun 11, 2010

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SUSE :: URL Link Launcher Creation / Unable To Resolve Hostname

Aug 6, 2010

I am updating all of the company systems from Novell SuSE Desktop 10 SP2 to 11. We have several links on the desktops of users that are URL's. In version 10, I just did a Create Launcher, Type was Link and I could type in a URL. The LINK type no longer exist. I checked on my system at my desk which is OpenSuSE 11 and it also does not have the link type. I have been searching on the Internet for creating Launchers and then looking for information on creating links and have not been able to find anything. Can anyone point me to a good howto or document on creating URL link launchers (we have a system that runs Apache and from the users PC they click the link to connect to the server). I tried just creating a bookmark in Firefox and then dragging the bookmark to desktop and customizing icon. But, I build the systems at our corporate offices, and when I build, the IP address on the system is the actual IP and since it is not at the final location it can not connect, and the bookmark creation on desktop fails with error 'Unable to resolve hostname'

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Networking :: FC13 Install Can Ping By Hostname - Ssh By Hostname Fails

Jul 29, 2010

I'm having an issue on two Fedora Core 13 machines where I can ping others by hostname, but the hostname resolution fails whenever I use ssh/scp/vnc/etc. I can still do these things by IP address, just not by hostname. RHEL5.3 machines on the same network with the same configuration do not seem to have this problem.

Here's the not-so-quick-and-dirty description of the situation:

I know that there is a virtual router at 192.168.31.1 and another at 192.168.30.1. I also know that there is another network (let's call it 90.90.90.0) and on that network lies a number of resources. By nature of this configuration, any machine on 90.90.90.0 can be accessed by any 192.168.x.x, but not the other way around. Beyond that is out of my hands and currently out of my scope of knowledge.

I have a dnsmasq server on 90.90.90.10 that operates as a secondary nameserver, another machine out of my sphere of influence is the primary nameserver (90.90.90.31).

The secondary nameserver on 90.90.90.10 holds the hostnames of our development machines. The problem is that in some cases, while I can ping by hostname all day long, services such as ssh, scp, vncviewer, etc all fail to resolve the hostname. In other cases I can do all of these things.

Every machine has an equivalent resolv.conf:

As an example, I will show the output of a handful of my development machines:

I also included columbia as a one-way test -- even though it cannot access 30.x or 31.x, they can access it:

columbia -- physical machine, Red Hat Enterprise 5.3, IP 192.168.100.200

Okay, so here are the various outputs. Remember, nibbler, discovery, and atlantis can ALL:
- Ping by IP address
- Ping by hostname
- ssh, scp, vnc, etc by IP addess

Additionally, the SERVFAIL reply from 90.90.90.31 is expected since my dnsmasq server is on the secondary server.

Note that the only machine that can both ping and ssh/scp/etc by hostname is nibbler, which also happens to be the only one of the three running RHEL5.3 instead of FC13. Other virtual and physical machines running on the 192.168.31.0 and 192.168.30.0 networks (all running RHEL5.3) work just like nibbler does. So the problem seems to only affect machines running FC13.

Final note: selinux is disabled, iptables is disabled, ip6tables is disabled.

Other than that, discovery is a brand-spanking-new install straight off of the FC13 DVD. atlantis has been around longer, but its just a file server so I haven't done anything too crazy to it.

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I was able to succeed in connecting my email finally by using the IP provided by nslookup, but still am unable to get my google Calendar to connect: Code: Cannot open calendar: Unexpected HTTP status code 2 returned (Cannot resolve hostname (www.google.com)) No proxy settings configured in Evolution or Fedora and none needed. Lemme know what else I can provide.

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Oct 8, 2010

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Dec 2, 2010

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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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