Ubuntu Networking :: Not Showing Proper Hostname On Local Network
Mar 8, 2011
I found that I needed to connect them to the same workgroup, which I now have and for the most part it works. However, for one of the computers I do not want to use a .local domain, rather I need to use a .org. But no matter what I do, other computers on the network think it is a .local hostname. Currently the /etc/hostname on the computer file is as follows:
[Code]...
Here is a screenshot of an ipscan done from another computer on the local area network so you can see what I'm talking about.
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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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Apr 13, 2011
I have installed Ubuntu on four machines at work and have been blown away. On my machine I have Apache setup for web development and other machines can "see" it using my IP address. I would like to have it so they can access by the name of my computer though. I have no local DNS server so I guess I need to hard code the relationship in each machine? Ideally I'd actually like to be able to use subdomains (which I use locally to avoid annoying .htaccess path problems). i.e. from another machine on the network to go to [URL].
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May 31, 2010
What is the right way to specify hostname(in local linux box, not in DNS server):
myhost1
or
myhost1.mydomain1
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May 14, 2010
ever since upgrading from karmic to lucid, i cannot ping fqdn hosts in .local tlds. nslookup & dig work, but most other utilities fail (ping, traceroute, etc...). i know .local is an invalid tld, but apple seems to have made it a defacto standard on private networks, so i'd imagine somebody else has seen this issue before... is there a simple fix that doesn't require managing hosts file entries on a bunch of systems?
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May 5, 2010
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.
I already have dnsmasq on my server handling all DHCP and DNS requests. How can I get dnsmasq to return an IP address for a .local address?
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Apr 30, 2010
I can reach other hosts by means of their global addresses by either the IP address or hostname (that has the global address). What I want to (also) do is have a hostname that references the IPv6 link local IP address (an AAAA record in DNS, or just the fe80::<whatever> address in /etc/hosts) and use that host name in commands to access that host. The problem is, an interface ID is needed when making such a reference.
It sure looks like the programs just pass the host name string on to the resolver library, which does not understand the significance of the '%' even though it could find and see that the name preceding the '%' is consistent with that being an IPv6 link local address (e.g. the logic could have been "split at first % and see if preceeding name is found as a link local address and accept that if so, or ignore the split otherwise" ... but it isn't). Is there a different syntax for this ... or was it overlooked in the design of programming around IPv6?I want to be able to address a host by its link local address, while still using a mnemonic instead of having to type the IPv6 address.
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May 16, 2010
I'd like a way to see all of the devices on my local network and what their local IP address is. I recall that I used wireshark to troubleshoot a similar problem a while back, but it doesn't seem to have a way to see all of the devices- only the traffic. (I'd like to do this without having to physically interface with my router if possible, and I am in an encrypted network if that matters)
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Jun 28, 2011
I have installed a web server on my local network. Everything is well configured and web pages are shown correctly from Internet (outside the local network) using the domain or the public IP.The issue is if I try to see that web pages (using the domain or the public IP) from inside the local network. In that case the router config page (192.168.1.1) is shown instead of the web pages.From inside the local network I'm only able to see the web pages using the internal IP address (192.168.1.XX).
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Oct 5, 2010
I have a server that is on both a standard network and a virtual network, as follows: server1 attached to standard network server1 acting as Dom0 with two linux DomU guests (under Xen) I only have one network card. How do I configure server1 to have a different hostname on the standard network than on the virtual network? Here are the relevant network configuration files for server1:
/etc/sysconfig/network-scripts/ifcfg-eth0:1
DEVICE=eth0:1
BOOTPROTO=none
NETMASK=255.255.255.0
IPADDR=192.168.122.9
[Code]...
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May 25, 2010
I've got an Ubuntu server hosting our websites and other various things here in our own home. We recently switched to a router that doesn't support loopback (abomination), so I've set up hosts files on our computers so we can access our own sites when on our home LAN.
However, we often take our laptops as we travel about, and I'm guessing due to the hosts files when we try to access our sites, it'll look on whatever local network we're connected to for our server, which won't work, obviously.
Is there a way to set up something like a hosts file that'll only try to look up the local IP of the server when we're on a specific network (our home one), or have one that tries to look for the local IP first, then proceeds to try and resolve the domain name and use the external IP if the local IP doesn't work?
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Oct 1, 2010
It seems that whenever I boot my laptop (hp probook 6450b) without a monitor attached, then boot with a monitor later attached, the configuration gets all messed up.
Currently, if I boot with the monitor attached, right after the blue loading screen (at the login prompt) i get two black monitors and a mouse, with no login screen. Unplugging the monitor shows the login screen on the laptop.
If i boot without the monitor attached, log in, then plug it in, i see the following from xrandr:
Code:
Screen 0: minimum 320 x 200, current 2390 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
1366x768 59.6*+
1024x768 60.0
[Code]....
However, now when I reboot, all settings are lost, and if the monitor is attached, i get the black screen with a mouse at login.
I did notice that when I shutdown, it hangs on "Running guests on default URI", and i get a stack trace. It will keep dumping stack traces, and i have to hold down the power button to force it off.
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Sep 17, 2010
My /etc/hostname is not announced on the local network (not showing up on my Mac nor router) when setting /etc/network/interfaces to:
Code:
iface eth0 inet static
address10.0.0.10
netmask255.255.255.0
gateway10.0.0.1
I have tried bringing the interface up and down, and have also rebooted. If I change it to DHCP it will display, but this does not really help me.
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Feb 14, 2010
I was under the impression that if I have any programs not installed by the package manager, they belong in /usr/local rather than /usr. But if I put the executable in /usr/local/bin, and the jar files into /usr/ local /lib, I get runtime errors about being unable to load the Java classes. So I resorted to putting things in /usr/bin and /usr/lib and it worked fine.Is this something that can only be corrected by compiling differently, or am I missing an installation step?
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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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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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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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May 31, 2011
how to disable or modify the email headers showing the internal IP and hostname of the server when using sendmail. I want this removed or change to just a domain name.
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Feb 20, 2010
I've setup two slackware in a Dell Inspiron 640m e in Acer Aspire One D150.
In my router the domain is "home", the two slack use wicd (dhcpcd backend) to connect. I can go in internet.
The problem is that in my router panel I can see the hostname (so dhcpcd send the right one) but they can't ping other machine in the lan (windows 2000, nas or other linux box).
Now I can't use a fixed ip (i change several networks with different routers).
I think I miss something that can ask to my router the hostname.
Anyway I was able to ping Dell.local and Acer.local with Ubuntu karmic.
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May 31, 2010
I'm working with a Ubuntu 10.04 LTS system with two network interfaces (both Ethernet). I wish to setup this system such that it is simultaneously connected to my local and an OpenVPN network and able direct traffic between the connections depending on what program is sending the traffic. The problem: Under my current OpenVPN configuration all network traffic is directed to the VPN.
My OpenVPN config file (some details omitted)
--remote [gateway ip] # vpn12 load:
--remote [gateway ip] # vpn11 load:
--remote [gateway ip] # vpn15 load:
--remote [gateway ip] # vpn16 load:
[code]....
In practice, I would like OpenVPN to operate out of one of my two network interfaces and leave the other interface connected to the local network. Then by default all network traffic should be directed to my local network unless I specify (on a per program bases) that certain traffic should go though the VPN. These two network connections can (should) stay completely independent of each other and do not need to talk to each other.
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Mar 31, 2009
I have two networks. One of them is wired, the other is wireless. The wired has an internet connection and a few other computers connected to it. The wireless network has a few hosts connected to it too, but it has no internet connection. What I've been trying, fruitlessly, to do, is make all connections that are bound to the internet, or my wired network, be routed that way, and all the connections to the hosts of the wireless network go that way.
Here's the setup..
Wired:
192.168.1.0/24 Gateway = 192.168.1.1
Route internet through here
Wireless
192.168.2.0/24 Gateway = 192.168.2.1
If my computer sends a packet to the internet, it should be routed through 192.168.1.1 If I send a packet to one of the local hosts of the wireless network, it should be routed through 192.168.2.1. Here's the routing table I've set up(This is one of many configurations I've tried)
Code:
$ ip route show
192.168.2.1 dev wlan0 scope link
192.168.2.0/24 via 192.168.2.1 dev wlan0 src 192.168.2.4
[code]....
With this, and everything else, I get destination host unreachable when pinging. The strange thing is that, if I unplug my eth cable, reboot and connect to the wireless network, everything is fine and I can access the router and the others. I'm trying to improve my networking skills, as I've had this of setting up a small linux box as a router for quite some time, for the fun of it, but I need to get routing under control before I go ruin my network.
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May 22, 2010
Another Ubuntu install, another round of wireless problems. I have a Dell Inspiron 530 Desktop that I used Wubi to install Ubuntu 10.4 on alongside Windows 7 Ultimate. Everything installed perfectly but it's not detecting my wireless network so I therefore have no wireless access. My wireless network icon is gray with a red "!" on it; when I click it I get:
Wired Network
disconnected
Wireless Networks
disconnected
My wireless network does not show up at all; it's not hidden. When I try to enter it manually, I do so and when I click it I immediately get a popup that says
Wireless network
Disconnected - you are now offline.
I only have a wireless connection since the router is in another part of the house, and this is really frustrating me that this stuff doesn't just work on install like OSX and Windows does.
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Jan 21, 2011
If i want to use SSH to log on to my home computer, which is connected to the router, how do I go about connecting to it?If I get my external IP of the computer at home, it will show me the external IP of the router correct? Then I need to forward the router's external IP to my computer at home. But then, how do I connect using ssh? or do I need to consider my local IP of the computer at the router's network?
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Sep 25, 2010
I have recently upgraded the ubuntu desktop edition from 8.04 to 10.04. after upgrading i cannot show my eth0 nic interface in the System > Preferences > Network connections----- wired tab. and i also not getting network indication in the top of the panel beside the date time indication. but i can access network and using internet with that lan card. i cant understad my eth0 is connected or unpluged..
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Mar 4, 2010
How to make apache 2 accessible only on the local network? I have installed it in the easy way (but not the best, probably):
Code:
sudo apt-get install apache2 php5 php5-mysql mysql-server
And now I want to make apache only accessible in my local network.
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Mar 25, 2010
up until about four days ago connecting to the local LAN was as simple as booting Ubuntu, and letting nm-applet automatically connect on Auto Eth0 But the other day it just randomly stopped working, with no cause that I can think of. I can still connect to the internet (This is via a PPPOE connection, running through the same wired interface) so it can't be a hardware problem with the ethernet port/cables themselves. nm-applet just stays spinning in circles, and nothing ever happens. I tried deleting the auto Eth0 entry, and creating another LAN entry with exactly the same settings, but I still get the same problems. way to completely restore nm-applet settings? Or some other way to give me access to the local network?
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Oct 28, 2010
I've been having strange local network behavior with my Ubuntu 10.04 box. First off DNS was pretty flakey, but I replaced the automated DHCP servers with 8.8.8.8 and 4.4.4.4. Now I see very strange behavior in my local network, the symptoms of which are frequent dropped connections trying to use FTP, VNC, or Samba to try and connect to my other machines. I did a tracepath and got this back:
tracepath 192.168.1.136
1: 192.168.1.105 (192.168.1.105) 0.112ms pmtu 1500
1: no reply
2: no reply
3: no reply
3: 192.168.1.105 (192.168.1.105) 3002.961ms !H
Resume: pmtu 1500
[Code],,,,
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Mar 29, 2010
As it looks like the number of DNS Top Level Domains are just going to proliferate in the near future, use locally on an RFC 1918 private network in order to prevent a future name collision issue?
.local is the most obvious one but as that was stolen by Apple for mDNS/rendezvous use it's probably wise to avoid it now.
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Feb 7, 2010
Wireless network card is showing as "disabled"...How can I enable it through Ubuntu?
product: BCM4318 [AirForce One 54g] 802.11g Wireless LAN Controller
*-network DISABLED
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Oct 12, 2010
I upgraded to Maverick over the weekend from Lucid, and at school yesterday, I could no longer connect to the campus wifi network in my office. I have no problem connecting to the wifi network at home, and my phone still sees and connects to the campus wifi network, so I think the problem is with my laptop (Gateway T-6345u), which doesn't even detect the campus network. As of last week, it connected automatically, and now it can't even see the network.
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