Managing and using network connectivity on a Ubuntu system

learn more… | top users | synonyms (1)

8
votes
2answers
10k views

Can Ubuntu server connect to a WPA2 encrypted wireless network?

I'm planning to maybe install Ubuntu server on an old machine. But my question is: can I install Ubuntu server on a machine and have it connect to my home network - wirelessly? I can't use a cable in ...
7
votes
3answers
3k views

How to set up a computer lab for a school?

folks. I was recently given the task to remove Windows XP from some 15 computers in a primary school, install Lubuntu 12.10 on them (all too old for Gnome/Unity) and set up Scratch so the students ...
7
votes
1answer
12k views

How to map network scanner

I have just bought a shiny new Canon MG6250 multifunction printer/scanner and connected it via LAN. Installing the printing side of things was a breeze, however, I cannot work out how to set up ...
7
votes
1answer
4k views

Default route lost on reboot

After upgrading to 11.10, my system is "forgetting" the default route to the internet every time the machine gets rebooted. It "remembers" the route to the office (on a second NIC). In my ...
6
votes
2answers
2k views

How to use eth1 as failsafe system for eth0?

How to configure eth1 to be a failsafe system for eth0. When eth0 is down eth1 goes up, and when eth0 is up eth1 goes down
6
votes
4answers
11k views

Is it possible to connect to multiple VPN networks at once via Network Manager?

Is it possible to connect more VPN networks at once via Network Manager? I am running Ubuntu 12.04.1 LTS. For now I am only able to switch between preconfigured VPN connections. It`s quite annoying ...
6
votes
2answers
6k views

Why is ddclient giving me an “Invalid IP” error when trying to update dynamic DNS?

I am having a really hard time getting ddclient (which updates OpenDNS with my current IP address) to work. I have it running as a daemon, but it never succeeds in updating my IP address at openDNS. ...
6
votes
3answers
10k 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 ...
5
votes
6answers
11k views

Very slow, intermittent WiFi speeds with 14.04 and Intel PRO/Wireless 5100 AGN [Shiloh]

I did a fresh install of Ubuntu 14.04 LTS on the harddisk of a Lenovo Y650 Ideapad laptop. The wireless adapter is an Intel PRO/Wireless 5100 AGN [Shiloh]. Initially I could not connect to any ...
5
votes
1answer
1k views

How can I access Windows shares after changing DNS servers (e.g. switching to OpenDNS)?

I'm on Maverick trying to access shared folders hosted on Windows machines across a home network. Mysteriously I stopped being able to see them through Nautilus (I couldn't even open Windows network ...
5
votes
2answers
5k views

How can I start DHCP3-server later, so that it waits for a bridge interface to initialise before loading?

I have Ubuntu 10.04 server currently setup with dhcp3-server as well as a bridged interface (br0) for use with virtual machines. The problem I have is that when the server reboots, dhcp3-server fails ...
4
votes
3answers
21k views

Why can I ping via IP address but not hostname?

I have a media/file server running Ubuntu 10.10 Maverick Meerkat, connected via cable directly to a DSL router, which also acts as a network switch. The router uses DHCP to dynamically assign IP ...
3
votes
1answer
15k views

How to connect to WiFi from Lubuntu?

After add the Manage Networks icon into the panel, I can see my Wi-Fi network on the list. So I click on the SSID and it prompt for a password. I enter the right or wrong password but nothing happens. ...
3
votes
4answers
6k views

How to get your network ip

I am on a network with PPPoE connection for internet acces.I want to find out my network ipv4. Example: -on Windows 7 I can see both my PPPoE's connection ip and local network ip, either from ...
2
votes
2answers
4k views

network interface (onboard wired) is showed p5p1 instead eth0

I've running Ubuntu 13.04 on my computer and it's ok. But some softwares like media servers don't work well. They search network interface eth0 and Ubuntu 13.04 named it p5p1. So my media server ...
2
votes
4answers
8k views

How do I SSH to machine A via B in one command?

I want to access a computer, say machine A which is based in my university's network. However, this computer is only accessible via the internal network of the university, so I can not use SSH to this ...
2
votes
2answers
6k views

How to setup a static ip in Ubuntu? Where i need network, broadcast, dns parameters to fill in from my ISP?

I have a public ip as below which is static (my isp provided) as below: IP Address: x.x.146.50 Subnet Mask: 255.255.255.240 Default Gateway: x.x.146.49 DNS1: x.x.1.196 DNS2: x.x.7.196 But ...
1
vote
1answer
1k views

How to configure a firewall that only allows a few webpages and dropbox and U1 services?

Can anyone give a step-by-step how-to that explains how to block all outgoing internet traffic to all websites, but allows only a selected list (needed for working, fi. online dictionaries) allows ...
0
votes
3answers
9k views

Why would 127.0.0.1 in resolv.conf cause problems in DNS resolution?

[update and update II: see my awkward and proper solutions at the end of the question, based on one of the answers] I have an extremely slow DNS lookup when my resolv.conf file includes the 127.0.0.1 ...
0
votes
2answers
1k views

Ubuntu 12.04 - Network Manager Problem In System Tray

I am using Ubuntu 12.04 and I installed fallback version of desktop. I have a problem about my network manager in system tray. I can see network manager but no button is working in network manager in ...
0
votes
1answer
8k views

How do I enable the alx ethernet driver on Ubuntu 13.04?

I just upgraded to Ubuntu 13.04 64 bit on my Lenovo IdeaPad laptop and am having trouble getting the Ethernet to work. The alx driver required for my laptop's AR8161 Gigabit Ethernet controller to ...
12
votes
3answers
11k views

Configuring Firefox to use a proxy from the command line

I'm looking for a way to tell Firefox to use a proxy in Ubuntu Ludid (10.04.1 LTS). I'm installing Ubuntu semi-automatically on several identical machines. For this, I use a script that, amongst ...
7
votes
3answers
794 views

Prioritize traffic from LAN computers

I'm running torrent client on my headless Ubuntu server. Also number of computers are connected to this server, which is used as internet gateway/router. The question is whether it's possible to ...
7
votes
2answers
2k views

WIFI looses connection with AR9285 - have to disconnect / connect to regain internet?

I have a G73JW laptop using Ubuntu 12.04. It has an Atheros AR9285 card. While wifi seems to work fine most of the time, about every hour or two it will loose the connection to the internet. The ...
7
votes
5answers
17k views

How do I connect my desktop and my laptop using an ethernet cable to transfer files?

I have an ethernet cable (not a crossover cable) to connect my laptop and my desktop ubuntu machines. I want to transfer large amounts of data. Is it possible with such a cable? I believe that between ...
7
votes
2answers
17k views

How Can I Roll Back a Kernel Update?

An update for Ubuntu was available today and it installed the generic kernel 2.6.38.11.26. After doing so networking is no longer functioning correctly. My Acer Aspire 4520 has an Nvidia Network card ...
6
votes
4answers
4k views

Error: 'There was a problem connecting to the CUPS server.'after upgrade 14.04 to 14.10

After upgrade from 14.04 to 14.10, I can not use my (SAMBA) network printer anymore. Jobs stay in the que forever. When I go to 'Printers' and ask for the properties of the printer, I get the message: ...
6
votes
3answers
5k views

How to configure a LAN connection between two Ubuntu machines?

I have installed Ubuntu on two of my desktops PC's. I have not installed any addon packages or anything related to network as yet. Please guide my on how to set up a LAN between these two machines. ...
6
votes
6answers
2k views

Uploading or attaching files that located on a shared drive doesn't work?

I have this odd, quite minor, but annoying issue that I am quite perplexed about. Whenever I try to upload a file via my browser(let's say attach a file to an email in GMail), I click 'Browse' button ...
5
votes
2answers
12k views

How do I setup an LXC guest so that it gets a dhcp address so I can access it on my network?

I setup LXC using: lxc-create -t ubuntu -n lxcguest1 But I can't access any services running on it from my LAN, it appears to be NATed. How do I set it up so that I can access it (it probably ...
5
votes
1answer
7k views

How to limit internet speed? [duplicate]

I have 3 accounts in my pc, i would like as the admin of the pc to limit the internet speed (upload/download) for the other 2 accounts, is there a way to do this?
4
votes
2answers
4k views

Cannot connect to the internet after installing Cisco AnyConnect VPN Client

Today, I tried to install the Cisco AnyConnect VPN Client on my computer running Ubuntu 12.04 updatet earlier today. I followed the instructions on this webpage ...
4
votes
3answers
2k views

Persistent 3G connection with network manager fails [closed]

I maintain a persistent 3G connection on a remote device using network manager. However, every so often, the link fails and then does not restart itself. I managed to identify an occurrence of this in ...
4
votes
1answer
18k views

How to make X.org listen to remote connections on port 6000?

This is on Ubuntu 10.10 (Maverick Meerkat) 64-bit desktop. I want to make my X server listen to remote connections from clients in other machines on the local network. I know about ssh -X and that is ...
3
votes
3answers
8k views

Ubuntu 14.04 : My computer sees the wireless network, but won't connect to it, keeps asking for the WPA password

Specs: Computer: Sony Vaio VGN-NW240F Wifi card: Network controller: Qualcomm Atheros AR9285 Wireless Network Adapter (PCI-Express) (rev 01) More information (lspci -vv -s): Subsystem: Foxconn ...
3
votes
1answer
438 views

Doing something if connected to particular SSID in Ubuntu

I want to write a bash script that will put off dropbox automatic synchronization if i'm connected to particular wifi ssid. How can i catch this event: for example i'm working at home and sync is on, ...
3
votes
3answers
4k views

In Wired Connection settings save option is getting grayed out

Each time I switch to manual configuration, of wired connection in Ubuntu 12.10, the save button gets grayed out. As soon as I start setting it in Manually, it gets grayed out.Please help ! One ...
3
votes
3answers
712 views

How do I run a simple Zenity script after disconnecting from WiFi?

I am running Kubuntu 12.10 64bit. I am trying to get a bash script to execute when I am disconnected from the network. I created a file in the folder /etc/network/if-down.d/ called test which has a ...
2
votes
2answers
135 views

Transferring files from Ubuntu PC to Ubuntu laptop

I'm basically new to this, so I'll try to explain what I want to do as best as I can. I have a desktop running Ubuntu 12.04 and the hard drive is full. I want to transfer the files over to my laptop ...
2
votes
1answer
49 views

How to specify what network to connect to automatically?

I'm on Xubuntu 13.10, I can connect to two different networks, x and y, I have passwords to both network and I can switch between them at will. When Xubuntu starts, it automatically connect to y, I ...
2
votes
1answer
461 views

BCM4313 eats up all the wifi

I have a problem similar to this : While using internet on ubuntu, all other computers get bad internet connection So the problem is, whenever I log onto Ubuntu Internet, all other computers Internet ...
2
votes
1answer
9k views

Booting system without full network configuration

I was trying to solve internet problems, and seem to have made things worse: Now when I start the computer it gets stuck on "Booting system without full network configuration". Does anyone know how ...
2
votes
2answers
4k views

How to forward an Internet connection to another network?

Can somebody please make a short & sweet tutorial telling how to forward an Internet connection to different network interfaces in Ubuntu...? This is the idea: I'm using a 3G usb modem to get ...
2
votes
3answers
1k views

How to open files from other machine running ubuntu

I tried to take data from my pc to laptop. Both are using ubuntu 11.10 os. I googled and tried to connect both the systems. Now it is showing connected symbol. Dont know how to proceed further. I need ...
2
votes
1answer
1k views

Ubuntu 12.04 - USB3 issue with mobile broadband usb sticks

I am getting a very strange problem as regards the USB3 port of my laptop under ubuntu 12.04 (My laptop is a Dell Inspiron n14z). The laptop has two USB3 ports and one USB2 port. In order to get any ...
2
votes
0answers
213 views

Networking failing on both wired and wireless connections [closed]

Running 11.10 on a Lenovo B570, maybe a month old. When I try to connect to a network, wired or wireless, nm-applet does its normal "connecting" animation, but sort of "spasming" at the end of the ...
2
votes
5answers
4k views

How to block, deny or redirect an IP address or website domain

This question popped a couple of days ago and it is: How to block, deny or redirect an IP address or domain name to another IP or web domain without the use of a router or configuring a browser. ...
2
votes
2answers
3k views

How to setup a local network over the CAT5 cable?

I use Wifi to connect to the internet, and want to interconnect the two machines I am using so that it is easy to transfer files I can copy from one machine and use the same buffer on another ...
1
vote
1answer
113 views

Ubuntu UI Toolkit's interaction with my device fails due to SSH protocol capabilities mismatch

Testing my device's (nexus 4 running latest from devel-prosed) connection from SDK->Options->Devices->Test I get: Connecting to host... SSH connection failure: SSH Protocol error: Server and client ...
1
vote
3answers
7k views

apt-get doesn't work behind a proxy

My company uses an HTTP proxy and our various Ubuntu 12.04 servers therefore need to be configured properly, namely by setting \etc\apt\apt.conf.d\80proxy to: Acquire::http::Proxy ...