Tagged Questions

0
votes
0answers
25 views

Wired network works in live CD but not after installation

Live CD and installation have working network connection. But after installing, the network connection is offline; it won't connect! No automatic configuration, aka DHCP doesn't work. Static ...
0
votes
1answer
49 views

MAC address changing in Ubuntu 12.04 [duplicate]

I am trying to change the MAC address of my device. I tried the ifconfig way as well as the macchanger tool way. However although the MAC address changes on interface eth0. I do not get a DHCP based ...
0
votes
1answer
112 views

Ubuntu as a Router/Gateway - Unable to access WAN

I am currently trying to set up a home router using a machine running Ubuntu 12.04. The machine has two ethernet ports. eth0 is LAN and eth1 is WAN. I have set eth0 to a static ip and have eth1 ...
0
votes
0answers
17 views

network configuration with includes?

i saw in lot of ubuntu conf files that is containing include files. so, i think about that how to solve problem of many people that have dynamic ip address. so this question is based on that, to ...
1
vote
0answers
49 views

DHCP can not obtain correct IP sometimes

I installed Ubuntu lucid on my Thinkpad x201i laptop.Recently I found it that when I connect my cable to my laptop in our school's library,my DHCP client can not obtain correct IP. I have to set it ...
0
votes
0answers
56 views

“Shared to other computers” in network setting turns off DHCP

(follow up to this - Sharing internet between mac mini (with ubuntu) and android - I guess) I want to share a wired connection wirelessly. The only way I found is to set the wired connection as ...
2
votes
1answer
102 views

internet connection: connected only when detach/attach the wire again

I just started my adventure with Linux. obviously had many issues already, but get to manage it. one that bother me a little though I have found the temporary workoround is my network connection. my ...
2
votes
0answers
43 views

Add Server between current wireless router and new router

I have a Ubuntu 12.04 Server with a wireless router attached. I would like to connect it to my modem/wireless router via the wireless interface in a transparent manner. My goal is to use the server to ...
0
votes
1answer
66 views

How do i make ubuntu request a specific ip address from a dhcp server?

So here's the deal. My router assigns ip addresses starting from 192.168.0.50. I have a couple of computers running ubuntu which i want the router to assign 192.168.0.50 and 192.168.0.51 every time ...
0
votes
1answer
134 views

How to connect internet across a static IP network?

I'm using Ubuntu 10.04 but without internet at home. The reason I think is I have changed my network connections recently to static IP from DHCP because gnuradio needs static IP for accessing external ...
1
vote
1answer
41 views

Per network settings for a laptop

I often roam in different networks. Some of those need special settings for DNS or block mails to external mailservers and only accept internal smarthosts. I'm looking for some kind of program where I ...
0
votes
0answers
73 views

dhcp configuration not working ubuntu 11.10

I am usually behind a proxy server in college so I connect to the ethernet or wifi using manual IPv4 addresses only inside college. I have been trying really hard to get the internet work at home, ...
1
vote
0answers
1k views

Pxe boot Ubuntu 12.04

I have set up a CentOS server with Cobbler in order to start pxe booting. I took the ubuntu live cd and copied its contents to /distros/ubuntu12.04-desktop-32 I then ran the command: cobbler distro ...
1
vote
0answers
446 views

Why can't I connect to my network via wired DHCP connection?

I am trying to connect to the LAN of the university where I work, on a wired connection. The Internet is accessed by VPN after connecting to the network. On Windows 7, the computer seems to ...
1
vote
1answer
283 views

ubuntu 12.04 dhcp gateway server

I need a little help. I will explain this the best I can so people don't have to ask extra questions Essentially, I have a dell poweredge 2650, with 2 nics. eth0 goes to my cable modem, while eth1 ...
1
vote
1answer
969 views

Setup DNS server for local network (with DHCP) for use with apache

I've set up an ubuntu-server to host a website. But at first i want to configure it to work in my local network. Actually it serves as DHCP server for the whole network with static ip 192.168.170.250 ...
0
votes
0answers
118 views

How can I obtain an IPv4LL address when dhcp server is down?

I edited the /etc/network/interfaces with the lines auto eth0 iface eth0 inet dhcp but, if the dhcp server is down, I want the interface obtains automatically a link-local address. Is it possible? ...
1
vote
1answer
156 views

Timeout in a connection to a DHCP server

I want to configure my eth0 interface using an external DHCP server (resident in my subnet), so I edited /etc/network/configure with the lines auto eth0 iface eth0 inet dhcp but I also want to ...
4
votes
1answer
2k views

dhcp3-server or isc-dhcp-server

So. I need a dhcp server on my ubuntu server. I've found two options, and some saying it's the same thing? Could someone explain the difference, maybe even pros and cons? If it's not the same.
1
vote
1answer
394 views

MAC filtering after DHCP

How to manage filtering by MAC in Ubuntu? Scenario: Ubuntu DHCP is configured and working (network 192.168.1.0) a) Laptop 1 is set in configuration on Ubuntu as static IP Laptop 1 is configured ...
0
votes
2answers
963 views

NATTING in Ubuntu Server

My Server has two NIC, One is connected to the Internet Service provider with dhcp ip (dynamically change) given by ISP and other NIC is connected with local Switch with 192.168.1.1 IP. Now I want to ...
0
votes
1answer
156 views

Ubuntu keeps reconfiguring my network

I'm configuring a "network", between two computers(both with ubuntu 12.04), using a crossover cable and assigning all ips by hand. When I set up an interface, with IP netmask etc, everything works, ...
1
vote
2answers
3k views

DHCP not working on new install

A new Kubuntu 12.04 install is not getting IP addresses from either the wired connection nor from any wireless connection. The cables / router ports / wifi adapter / access point are all known good ...
2
votes
2answers
2k views

How to make dhclient forget its last DHCP lease?

What I'm trying to achieve is to get cold-start, zero-state DHCP lease which means forcing dhclient through the full discovery and configuration process (DHCPDISCOVER–DHCPOFFER–DHCPREQUEST–DHCPACK as ...
3
votes
1answer
1k views

testing dhcp server locally on one physical machine with virtual machine

I'm writing simple program to configure and monitor DHCP server on my Ubuntu 12.04. What I'm trying to achieve that my physical machine will be DHCP server and my VM (virtual machine) get one lease ...
0
votes
1answer
1k views

Unable to set default gateway on a hosted Windows virtual server

I'm running Ubuntu server via Hyper-V and have successfully installed it but seem unable to ping the server or ping any other machines on the network from the server. After doing a bit of reading ...
27
votes
6answers
16k views

How can I find my public IP using the terminal?

I am on DHCP, having dynamic IP. Finding your public IP when using a GUI and a browser is extremely easy. Simply go to Google.com and search for "What is my IP". Google will display it in the very ...
0
votes
2answers
535 views

why do none of my local servers resolve

When I try to ping or browse using a web browser certain domains names that we host on our local network, it does not work. Yet dig, nslookup correctly return their details. What do I need to do to ...
1
vote
1answer
86 views

How do I connect to available networks from the command-line?

More accurately, how do I tell Ubuntu to obtain an address using DHCP for all the network interfaces it finds (which do not require a password)?
1
vote
1answer
3k views

Wired network connection fails after installing Ubuntu 12.04

Having installed 12.04 amd64 desktop from the alternative ISO (I'm using LVM on a RAID5 array), my networking fails after booting into the installed system. It works fine on the 12.04 Live CD and ...
2
votes
1answer
225 views

DHCP server doesn't assign network dns to other hosts on my network

I had a problem with my DHCP but I managed to fix it. Now the network starts but I have a problem with DNS. Clients in the network don't get any dns from my DHCP. My network works as follow my I ...
0
votes
2answers
318 views

Internet doesn't work by default

After upgrading to Precise, I am required to run 'sudo dhclient eth0' in a terminal in order to get the internet to work. Everything worked perfectly fine on Oneiric, so It's really puzzling me. I'm ...
0
votes
1answer
2k views

Is it possible to use Ifconfig to switch an interface to DHCP and if not, what is the best way?

I have just set up a new Ubuntu server and I am going to be doing a lot of networking tests. During setup, I simply skipped the network step. I now need to switch between DHCP and an address quite ...
0
votes
2answers
514 views

How to make an internet server as firewall using ubuntu 11.10

i have one static broadband connection which is coming to my Ubuntu server with 2 lan cards, there are 10 more PC's to which i need to provide internet connection through Ubuntu server as well as i ...
0
votes
1answer
494 views

aufs Root File System On Usb Flash

I configured aufs as a Root File System On Usb Flash Drive by this article. So the first brunch is real root FS and it is read-only. The second brunch FS is in memory and it is read-write capable. ...
2
votes
1answer
1k views

Is dhclient.conf used during boot when bringing up network interfaces?

I am running Ubuntu 11.10 32bit Server on a single-board computer. I want the option of using the Ethernet interface (eth0) as a backend to control the computer if it's connected. I'm also lazy: if ...
2
votes
3answers
8k views

How to get hostname from dhcp server

I want ubuntu to get hostname and dns name from dhcp client. Default installation of 11.10 does not do that. Update: same question asked and Unsolved
1
vote
1answer
3k views

Set up eth0 network interface using DHCP in initramfs

I created my own initramfs script (based on live-initramfs) and I need set up network connection (using DHCP) to get remote file. So what do I need to add to initramfs hook file (ifconfig, ...
4
votes
2answers
1k views

How to enable DHCP server to all subnets for PXE server?

I have setup-ed a PXE boot server for installing ubuntu via network. Currently i am using hosts mac address to install the ubuntu operating system. I would like to enable the DHCP server in all the ...
0
votes
1answer
420 views

Python script to check if current IP address is from DHCP or static

How to check if eth address is taken from DHCP or set manually (static) using Python?
0
votes
1answer
5k views

DHCP + Static IP for DHCP server on eth1?

I'm trying to set up an intranet using DHCP. I'm using Ubuntu 11.04 and a ZyXEL GS2200-24 managed switch. I installed dhcp3-server. Here is my configuration for DHCP (/etc/dhcp/dhcpd.conf): ...
2
votes
1answer
469 views

How to set up static IP for DHCP server

I would like to set up a DHCP server on Ubuntu 10.10. How can I give it a static IP? I know this question is not very specific--I would like just you to point me in the right direction.
2
votes
1answer
661 views

No client internet access when setting up these iptables rules

I have read many other posts but cannot figure this out. eth0 is my external connected to a Comcast modem. The server has internet access with no issues. eth1 is internal and running DHCP for the ...
2
votes
2answers
2k views

How can I set up a Dynamic DNS fetching service on Ubuntu Server?

I've created accounts and hostnames within my http://no-ip.org/ account, which is by far the most commonly used service for my type of server. Can somebody walk me through the configuration process ...
4
votes
1answer
855 views

How do I setup DHCP-Server interfaces so they are mapped/bridged to each other?

I have recently setup a DHCP-Server on an Ubuntu 10.04 server machine. The machine has two interfaces (eth0, eth1). I have the DHCP server setup correctly because computers connecting to the network ...
0
votes
1answer
1k views

Howto reconfigure network automatically? [closed]

Question: When you install ubuntu-server, it lets you configure the network, with the option to do that automatically. My computer wasn't attached at the network at the time, so I just skipped this ...
2
votes
1answer
270 views

Is it possible to setup a DHCP server only for local virtual machines?

I have a quick question. I have a bunch of virtual machines (VMWare Workstation) running on an Ubuntu server and have found that VMWare NAT (DHCP) service is unreliable and slow. I have to use NAT ...
1
vote
2answers
666 views

How can I configure Mythbuntu 11.10 to wait for a DCHP lease before completing boot and starting network dependent apps?

I have a clean install of Mythbuntu 11.10 acting as a frontend only. It is networked using eth0 and I have a router acting as a DHCP server on the same subnet. The frontend boots and automatically ...
6
votes
2answers
9k views

Waiting for network configuration message at boot, then blank screen

When I boot (11.10), I get the message that it's "waiting for network configuration" and then the same, but "60 seconds longer" and then finially it "boots" but to a black screen. No cursor, just ...
3
votes
2answers
3k views

How to override the DHCP-provided nameserver?

I (think) that I've configured a static IP address in /etc/network/interfaces: # The primary network interface auto eth0 iface eth0 inet static address 10.1.1.2 netmask 255.255.255.0 ...

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