Questions tagged [networking]
Computer networking is the connection two or more computing devices for transmitting and sharing data. The devices use common communication protocols over a physical or wireless connection. Use this tag for questions about managing and using network connectivity on an Ubuntu system.
23,033
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Firefox does not connect outside proxy while other browsers do
Little background: I am behind a proxy, where we use "automatic proxy config URL" on http://webproxy.mycompany.com:8080
During typing of this question I also tried Chromium browser which seems to be ...
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How to create a script that will connect to a specific network
Using the integrated Network Manager, I created a new VPN Connection, called 'My VPN'. When I click it, it connects - great.
Now I need to automate it a bit. Is it possible to write a script which ...
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Weak WiFi signal
I have a Fujitsu Lifebook AH531 (I think wireless is Intel® Centrino® Wireless-N 1030, 802.11 b/g/n)
I have recently installed Ubuntu 14.04 LTS
Previously I used Ubuntu 12.04 LTS and Windows 7 on the ...
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Ubuntu 14.04: How to send email without registering a domain or having an MX or A record?
Ubuntu 14.04 on a virtual machine that is not my PC. I use my PC (Windows 7 and Putty 0.63) to shell into it.
Uname=Linux ubuntucomp 3.13.0-24-generic #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ...
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How to remove network connections manually that aren't displayed in Edit Connections dialog?
I have collected several network connections over time. When I go to Network menu in topbar, and to Edit, the Network Connections dialog shows just one out of three connections. The other two are not ...
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How to PXE network boot Ubuntu Server 14.04 using NFS
So far I have a PXE server based on Ubuntu Server 14.04 setup and running, configured to serve a Linux Mint 17 live CD and Ubuntu Server 14.04. The aim is to use NFS to serve install media around the ...
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My wireless/WiFi connection does not work
my wireless isn't working since 14.04 on my Lenovo Ideapad N581.
I can see the Network, but cannot connect to it.
I can only connect to the network, when I switch the mode from 802.11bgn to 802.11abg....
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Reconfigure system (network) during boot based on HyperV information
I am running a HyperV environment with Ubuntu 14.04 server running in generation 1 guests setups. It runs nicely.
I want to be able to clone the system (while shut down), give it a new name, and ...
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Bonding TUN interfaces
I am trying to do VPN tunnels bonding as explained by Simon Mott - VPN bonding. But after doing the steps, and when I tried to start the bonding I got the same error message as in https://...
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Using arping command in ubuntu 12.04
I am configuring a pgpool instance to get a HA of postgresql services. I am following this configuration.
I found a command and I ran it manually in my console:
arping_cmd = 'arping -U $_IP_$ -w 1'
...
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USB 3.0 port not detecting USB modem
I have HP 250 G2 laptop with Windows 7 and Ubuntu 14.04 (dual-boot).
The laptop has USB 2.0 ports and one USB 3.0 port.
I am using USB 3G mobile broadband modem (Huawei K4201), which is working ...
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Static IP Configuration_Ubuntu 14.04
I have a problem setting static IP on my Ubuntu Server 14.04 LTS.
My computer has 2 interfaces p2p1 and p1p1. The p2p1 node - primary node - should be visible form the outer world.
I use the ...
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Help me with installing modem driver software
I am having Huawei ec 150 Data card. It works well with the default network programs in Ubuntu. My network provider offers 3g speed upto 1gb for two days There after the speed will drops as per the ...
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Problem connecting to ssh server that is behind another ssh server in nautilus
So I have this school server that I am trying to connect to via nautilus. In terminal it's all easy but I want to be able to open it also in nautilus.
In terminal my way of doing it looks like this:
...
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Ubuntu server 14.04.1 LTS wont install any packages after reboot
I just installed Ubuntu server 14.04.1 LTS on my old gaming pc to run a file server on. I got it all installed on the PC and was able to apt-get update and apt-get upgrade and install samba, openssh-...
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openstack: conifgure vm with static ip on eth1
I'm trying to create two trusty VMs with static IPs for eth1, but pings between the static addresses fail.
Via havana dashboard, I created a network with a 10.16.1/24 subnet, disabled gateway, ...
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Ubuntu 14.04 Disable automatic network connection until after login
So I recently connected to my university's network for the first time using Ubuntu. After configuring it to correctly work with PEAP, it will now prompt me to login using my credentials on the login ...
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Wired connection cannot be established - no eth0
i am on ubuntu trusty 14.04, and i recently lost my wired ethernet connection for uknown reason.
I get eth0 no such device and other related errors.
I tried many solutions from other posts, and i ...
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Fastest screen sharing on Ubuntu?
Have you come across a smooth and high screen quality alernative to TeamViewr or screen sharing via Google Hangout? On long sessions it becomes very tiresome as there is so much lag so the image is ...
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What could "reject due to mismatch with WPA/WPA2" in output of wpa_supplicant mean?
I'm trying to connect to an Android 4.0.4 device set up to be a wifi tether using wpa_supplicant with /etc/wpa_supplicant/wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ap_scan=1
network=...
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what could be blocking port 5060 on my ubuntu 14.04?
I have a ubuntu 14.10, and am trying to telnet into it via port 5060 but I keep failing. I always get the message "Connection closed by foreign host".
I checked my iptable, it is default policy to ...
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can't ping to a friend's computer
I have Ubuntu 14.04 installed and I recently installed the same version from the same CD on my friend's computer. When I try to ping him I don't get any response, when I press Ctrl C to terminate ping ...
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Typing localhost is redirecting to another host in ubuntu
When I am typing localhost in my browser it is automatically redirecting to another site for eg google.com. Can someone please tell me how this is happening and can I change this behaviour?
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Configure WIreless Hotspot Ubuntu 14.04 Trusty
I would like to turn my laptop (Ubuntu 14.04 - Trusty) into a wireless hotspot.
So i linked my laptop to my router with an Ethernet cable, I went into System settings > Network > Wireless. I selected ...
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3
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My website is accessible on my home network but nobody else can access it on the internet
I have set up my Ubuntu server and have my site working on my home network, I am able to see my website on all devices connected to my router but beyond that nobody else can see it.
I have a Belkin (...
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How to set up broadband connection in Ubuntu 14.04 Desktop version [duplicate]
I have installed Ubuntu 14.04 LTS alongside Windows Xp. My broadband connection working ok in Windows Xp, but it is not working in Ubuntu. I want to connect through LAN over PPPoE.
Please guide me on ...
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How to use Telnet through wlan0 when eth0 is default device?
I've got a bit of a conundrum that I can't find anything for, so I'm asking for help.
I recently got an AR2Drone from Parrot. I'd like to get some cool software on it, explore its file architecture, ...
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Connect to FTP via Nautilus connect to server
I want to connect other ubuntu machines on my network. I use Nautilus FTP connection manager for it, but it ended up with connection refused by server error.
I install vsftpd but it still shows some ...
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Setting up NAT for internet access on a connected router
I'm setting up a NAT for a connected router to my laptop using the following command (IP forwarding is enabled):
sudo iptables -t nat -A POSTROUTING -s 192.168.47.0/24 -o eth0 -j MASQUERADE
So ...
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SMCWUSBS-N3 Ralink RT3070 disconnected wifi
I'm using ubuntu 14.04 64bits, and this wireless pen to connect to the internet.
I've tried to update the driver from RT2870 to RT3070, downloading the latest linux drivers from SMC website.
After ...
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Is there a way to see the commands that would be executed based on /etc/network/interfaces stanzas?
The stanzas in /etc/network/interfaces translate to certain commands to bring up or down an interface and configure it.
Is there a way to see which commands it translates to (similar to set -x in a ...
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dhcpserver configuration, please help
I hope I will get help here.
I need to configure an Ubuntu dhcp server (12.10), the server has 2 network cards.
What I need to do is to configure the server as DHCP to give clients IP-Addresses (...
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How to block ips similar to editing the HOSTS file on Windows
I have recently switched to Ubuntu and need to block a few Ips for gaming. Previously, I could simply add a line to the file C:\Windows\System32\Drivers\etc\HOSTS but I am unsure how to do this on ...
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Setting pdnsd server
I installed pdnsd: it is correctly working.
My problem is that it ignores the opendns server I provided in the "server" section of pdnsd.conf labeled "resolvconf": instead of it, it uses the server ...
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setting up apache2 webserver -- differences between behaviour within my intranet and outside
I am new to apache2. I have an ubuntu 12.04.4 LTS machine in my home, and just installed apache2 on it. I wanted to set up a webserver running on a port other than port 80 (my router uses port 80). ...
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Slow DNS lookup after upgrading to 14.04
After upgrading my Kubuntu to 14.04 from 12.04, I got extremely slow DNS lookup in Firefox and Thunderbird.
I have checked the communications with Wireshark. Launching e.g. http://vs.hu in Firefox (...
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Problem with connecting mobile broadband in Ubuntu 14.04
When I plugged mobile broadband top right bar new mobile broadband option appears then immediately disappears then again appears then immediately disappears and so on...
If I click on new mobile ...
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How to fix: Epson wireless networked printer aborts after printing half a page
Ubuntu 12.04.4 LTS
Epson Stylus TX550W multifunction printer (copies, scans, but no fax): The first time I managed to discover the printer on my wireless LAN. However, when printing the Ubuntu Test ...
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How to edit /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts and similar files and why they can (not) be edited
I a trying to edit the following file (ls -alstr output): 0 -rw-r--r-- 1 root root 0 Apr 15 17:07 /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
Unfortunately, if I try to edit it with vim or simply ...
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How can I disable the network status notification bubbles?
I'm using the latest version of Ubuntu, with a Wi-Fi adaptor that Ubuntu detected flawlessly.
When the internet drops out, Ubuntu gives me a notification bubble in the top right of the screen, e.g. "...
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How do I create a system file /etc/modprobe.d/ath9k.conf?
My wireless adapter (atheros) will not work - I've tried extensive troubleshooting with @danatela (bless his/her heart) here:
Wireless not working - ASUS X450J - Qualcomm Atheros
but it failed. ...
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How do I resolve webpage encoding issues when using a proxy?
Unless I disable proxy, webpages show up as characters like
|ˆSš˜mð{ýîsqÐ|0MVà|ð|}}}0}@}P}`}p}€}P} }°}À}Ð}à}ð}~~ ~0~@~P~`~p~€~P~ ~°~À~Ð~à~€€ €0€@€P€`€p€€€P€ €°€À€Ð€à€ð€AA A0A@APA`ApA€APA A°AÀAÐAàAðA‚‚...
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How to list servers running in Ubuntu machine along with their port numbers?
Among some other servers installed in my Ubuntu system, one is the dictd server. The documentation says it uses port 2628. Running
sudo nmap 192.168.1.74 -p 0-9000
results in:
Nmap scan report for ...
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Error running wicd-curses on fresh install of 13.10 Server
After rebuilding a machine with a fresh install of 13.10 Server, I see the following errors when trying to run wicd-curses:
$ wicd-curses
Can't connect to the daemon, trying to start it ...
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3
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Ubuntu 12.04 LTS with Ralink RT3290, are monitor mode and packet injection supported with rt2800pci that came with the distro?
I have a fresh installation of Ubuntu 12.04 LTS and have a Ralink RT3290 wireless adapter. The distribution comes with rt2800pci driver and I've installed no other drivers or patches.
My network ...
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Ubuntu Server 12.04 stops responding soon after assigning a static IP manually
I know there's a lot written about this issue but no response seem to answer my question. So I am wondering my problem is with the most recent version of Ubuntu.
I have just installed an Ubuntu 12.04 ...
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5k
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Can't connect to wired or wireless network with Dell D520
I recently found my old Dell Latitude D520 and I decided it would be a learning experience to try and dual boot Ubuntu on it and play with a new operating system. I installed Ubuntu but to my surprise ...
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When I connect to the Wi-Fi, every other host in the "near" subnets cannot use the Internet
I use Ubuntu 12.04 LTS and I've been experiencing the following problem recently.
When I connect to the Wi-Fi network of the router A, the Internet connection speed of every other host in that ...
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Is there a way to activate Network Tablet on Ubuntu?
I have the android app called GfxTablet and I only have one program (GIMP) that the app can give input on GIMP. Based on the site [1], it says that can work with any Linux program on the computer. ...
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Cannot turn wireless networking off
I wish to disable my wireless networking because I have a wired network connection.
I am using ubuntu 12.04. In the menu at settings > network > wireless there is an option to press a switch which ...