Managing and using network connectivity on a Ubuntu system

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Why does connecting to a WiFi network fix DNS settings on another network interface?

I use EasyTether for USB tether to my MBA running Ubuntu 15.04. The steps to do this used to be: easytether connect sudo dhclient easytether0 At some point (probably after the upgrade to 15.04, ...
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How can I use mac to print, as an intermediate computer?

Here is the situation: I'm using Ubuntu 14.04, we have a printer(Lenovo-LJ2650DN) in our office's local network. Everyone is printing via the local network, but I can't! Why? Because there is no ...
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Unable to Open TOR

I have downloaded tor browser and also I have installed the same in my office PC. When I click on connect to tor network, It keeps connecting for some time and automatically will get closed after ...
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756 views

How can I reliably check which is the last time an Ubuntu machine has been connected to the internet?

How can I reliably check which is the last time an Ubuntu machine has been connected to the internet? In case this is not possible, a way to check the last time an Ubuntu machine has been connected ...
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WiFi still not working on Lenovo G50-30 after execution of blacklist & ppa:hanipouspilot

I'm trying for 2 days to get my WiFi connection working on the Lenovo G50-30. In different forums in French, English and German, I found several commands for the WiFi: sudo modprobe -r ideapad-laptop ...
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Removing Realtek ethernet drivers

I'm on Ubuntu 14.04 (Elementary OS). To try and solve my intermittent connection (which I now concluded to be a router/ISP problem) I tried to install Realtek drivers from here. I installed the ones ...
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52 views

IPAD connectivity problem with ubuntu 14.04 hotspot

Tried to set up DHCP server on my Dell Inspiron desktop (Ubuntu 14.04 installed) but doesn't seem to work. So I'm trying to manually input static IP address, DNS info etc into the ipad directly, but ...
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wifi drops in ubuntu 14.04 and doesnt connect till pc is restarted

I have a Lenovo 5070 laptop dual-booted between Ubuntu 14.04 and Windows 8.1, but there is a problem on the Ubuntu side: The WiFi (Realtek RTL8723BE0) gets connected but drops all of sudden and ...
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Network Manager working, but no Wireless in Menu

First time on the forums! I'm using Ubuntu 15.04, on an absolutely fresh installation. It's installed to a 500 GB external usb hard drive. In the panel, the network manager icon appears, with ...
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Unable to see wireless networks Ubuntu 15.04 GNOME

So I've recently installed Ubuntu 15.04 GNOME on a Mid 2010 13-inch Macbook Pro. When I installed the OS, I had to connect via ethernet, launch the additional drivers utility, and install the ...
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Wired connection and Driver install was automatic on Live USB, after install it won't even recognize cable is plugged in

When I first tried the Live 12.04 it automatically found the drivers necessary for my wireless to connect , and when I plugged my ethernet cable in it immediately read it and connected to my ...
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how to connect to a wifi (wpa/wpa2) in ubuntu server 14.04 [duplicate]

I just isntalle ubuntu server 14.04.2, in the installation process i could easily choose the network name from a list and typed the password. After the installation i saw that Im not connected to the ...
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Lubuntu (on flash drive) - Can't connect to WiFi with RT5390

I'm trying to connect to the internet while running Lubuntu from a flash drive, my computer sees my network but when I try to log in to it the icon spins for a while & either displays a ...
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55 views

Not able to get my Huawei E303f USB modem working on Ubuntu 14.04

I have been searching for a way to get my USB modem working. I am on ubuntu 14.04. I know that ubuntu takes these modems as a mass storage device at first. Therefore, I used modprobe and ...
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VPN server on ubuntu enabling NAT problem! please help

Hi I am trying to Create a vpn server on a vps which is running ubuntu percise 12.04. I have already installed pptpd and I have enabled ip forwarding but when I try to enable NAT with this command : ...
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Wireless USB dual band ac network adapter 14.04 LTS Asus, TP-Link, Tenda

I see a lot of questions about this issue but few answers, so here goes. HP 15 f24w laptop, about 8 months old, U 14.04 x64. I have an older N adapter that appears, connects and is otherwise ...
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Network Sharing [closed]

I have 5 Ubuntu Desktops 14.04 LTS installed. I want to create an Office network. I want one of them act as a Server and the other 4 as clients. But in the Edit Connections> IPV4 Settings there is ...
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Have 12.04, Have to start computer in recovery mode and earlier version

I have had issues with being able to use wifi on my laptop, and have had to have it hardwired to use it. Today I was able to resolve the wifi issue, but now If I shut my laptop off and restart it, it ...
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32 views

Configuring Wireless Static IP through Terminal

I try to configure a Wireless Static IP and everything I have found so far are referring to Ethernet connections. A helpful guide I have found is this one: ...
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How to port forward to Transmission behind VPN?

I'm trying to set up the transmission web GUI to run, but I don't know how (or even if I need) to port forward from behind my VPN. I've got the port set to 9091, but that's only on my local host ...
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60 views

How to share printer form ubuntu desktop to other ubuntu desktop

After 12.10 OEM now I have installed Ubuntu 14.04 and I'm facing the same problem. Dear Maythux you told me that in Print menu SERVER, PRINTER, GROUP, VIEW, HELP will appear and click on Server to ...
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How do I share a mount to the network?

I have a spanned RAID array using an XFS file system, located in /mnt/raiddrives. How do I now share this onto my network? I would like to be able to see the share on both a Windows machine and a ...
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70 views

Xubuntu 15.04 internet connection problems

I just installed Xubuntu 15.04 on my computer and I cannot log onto the Internet. My computer was connected during installation via ethernet. Once Xubuntu 15.04 had installed, I wasn't able to connect ...
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38 views

Iptable ordering of commands

When adding a new rule in iptable I want it to be the first command to be executed, which means it will go on top of the rules list. What do I have to add in the command to change its position on the ...
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50 views

detects all wifi except my own

i have a lenovo ideapad G480 and ubuntu 14.04.02. my laptop detects every other wifi but not my own. i have also checked the connection and it is working on every other device. could anyone help me ...
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Local Network Traffic Only

Ubuntu 14.04 freezes while I'm working. I reboot and when it restarts it can't reach outside the local network. i.e. I can ping another machine on the local network but can't reach site outside. What ...
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Ubuntu 14.04 not connecting to network on Mustang board

I asked this question earlier this month, and have tried using both DHCP and a static IP address on the system, but it still can't connect to any other network port, so something is either wrong with ...
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Hotspot stops working when more than one device connects

I'm using Ubuntu GNOME, and I create hotspots using the Network settings dialog (this one). The first time I start the hotspot after a reboot, it works perfectly, but only for one device. Once another ...
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17 views

Separate Ethernet card from Network Manager's management

I have Network Manager on my 14.04 laptop. It currently manages the networking. Unfortunately, I don't want Network Manager to manage the Ethernet card, eth0, and I just want it to handle the ...
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How to change MAC address “permanently”?

I am using Kubuntu 15.04. I was using macchanger eth0 -rto change my mac address. But there were two problems: Every time I disconnect and again connect to the network, the mac changes to the ...
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1answer
31 views

Firewall rules not working for network

I have configured my ubuntu server to be a router and firewall. It has dhcp functionalities and it gives ip addresses to my other two computers. There is an implicit deny in the network. However the ...
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Iptables HTTP not working on computer

By default I have an implicit deny so I used these two commands to try to enable http on ip address 10.1.10.201 but I cannot access any websites. sudo iptables -A INPUT -p tcp -s 10.1.10.201 --dport ...
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Cannot 'Ping' my server from client in PPTP VPN?

Recently i set up a server and a client using PPTP VPN . I can connect to the server,but cannot do anything else. I cannot Ping,SSH to the server from client and vice versa. For setting Iptables for ...
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Network data capture using Gulp

I want to capture a data from 10gb interface through gulp. Please tell me the correct way to install and use of Gulp
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Why does my eth0 interface always shows the same inet addr in different LAN

Problem in my Ubuntu 14.04 is eth0 interface always shows the same inet address regardless of network in which I am and the name of the interface has also changed from eth0 to eth1 due to some unknown ...
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You are offline now, erthernet problem!

I restated the service nework manager etc but with no succes.Leds are working fine on adaptor. dimitris@dimitris-G31M-ES2L:~$ sudo service network-manager restart network-manager stop/waiting ...
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IPtables command to block specific port for certain ip

I want to block certain services such as ftp, telnet, http for a certain ip address. What command will I execute in order to achieve this. The only command I have tried is sudo iptables -A INPUT -s ...
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Lan Messeneger Launch error

Based on this thread I have installed Lan Messenger successfully.But when launching the Lan Messenger.I am getting the following errors.I have attached the screenshot for the error. ...
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Dell Latitude 3550 WiFi seems to break routers (and itself)

This is really strange. I've got a new laptop with preinstalled Ubuntu. It has a dual-band WiFi adapter (5 GHz enabled). Three days ago, when I received the laptop I run it for the first time. I ...
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30 views

Ubuntu server router network connections

Is it possible to make the ubuntu router part of the network connections so my device can connect to it and the ubuntu router can assign an ip address via dhcp. I have already configured my ubuntu ...
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problem with configure network on ubuntu server using drac

I have installed Ubuntu 14 server on my server using DRAC of dell. I have got all the info from my server company like: IP Addresses, Gateway, Netmask and so on. I have tried to configure the network ...
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Unable to find ethernet network

There is no option to connect to an ethernet network . When I open System Settings > Network > Wired and click options it responds Error editing connection Unable to find a connection with UUID ...
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Ubuntu 14.04.1 LTS server can't get system updates or new applications/

I am running version 14.04.1 server with an ethernet connection to a ATT Uverse router. When I attempt to get an update, this is the response: john@MackHeath:~$ sudo apt-get update [sudo] password ...
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24 views

How to change Skype's port

I have got some problems with Skype, and I was wondering if there was any way to change which port Skype listens on? Like in the settings or anywhere that wouldn't cause any problems? If this is even ...
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Temperature suddenly rises on switching on WiFi on Dell Inspiron 5521

My laptop, Dell Inspiron 5521 is running Ubuntu 15.04 pretty nice and cool. However, the moment I switch the WiFi on(the card is an Intel Centrino Wireless-N 2230) the temperature suddenly rises. ...
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61 views

Fastest way to copy lots of data

I have to copy a lot of files (60000+) between two servers, which is approx 5TB of data. I've tried mounting the backup server as a folder, and copying the files that way, but I couldn't get the ...
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41 views

Why does my Wireless connection block my internet traffic?

I am on Ubuntu Gnome 15.04 and experincing a strange "bug". When i have wireless activated and connect my coble bound network - it looks like everything is fine (in the menu bar i see a connection on ...
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How do I get bonded NICs to use their real MAC addresses?

I have a bonded interface: bond0 Link encap:Ethernet HWaddr d4:ae:52:ce:32:4e inet addr:172.26.1.210 Bcast:172.26.1.255 Mask:255.255.255.0 inet6 addr: ...
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43 views

set static ip problem

I've tried to set this right for some hours, but when I restart service networking, I don't have any ip address at all. My /etc/network/interfaces look like this: auto lo iface lo inet loopback ...
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How to know what DNS am I using in Ubuntu 14.04

(A follow up to similar question for 12.04.) Prior to Ubuntu 12.04, you may see the active DNS in /etc/resolve.conf. In Ubuntu 12.04, NetworkManager no longer works with the file. You have to ...