Managing and using network connectivity on a Ubuntu system

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How to get external IP from remote Ubuntu computer

My ISP typically leaves my IP address fixed, but when there is a power failure, or if their service goes down for more than about 15-30 minutes, my home is assigned a different IP address. My goal ...
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Ubuntu 12.04 server - How to interpret this syslog entries about eth0 interface?

I am getting in my Ubuntu 12.04 server the following errors in syslog/dmesg. Recently the server became multiple times slow in network and causing at time hung application and many errors with ...
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Wireless connection doesnt work on ubuntu 10.04

I have dual booted my dell laptop with ubuntu 10.04. In ubuntu wireless networks are not getting detected while wired connection works. In windows wifi networks are detected and works without a ...
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8 views

Cannot Connect to wireless in Kubuntu 14.04

I recently installed Kubuntu 14.04 on my old Dell Latitude D630 that used to run Windows XP and the installation went fine. I ran the 'lshw' command and it showed that my WiFi adapter was recognized ...
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Understanding what a MAAS cluster can do and cant do

I have a cluster of 8 machines. One of the machine has 2 NICs with one connecting to the internet and the other connecting to a switch. The remaining 7 machines all have only 1 NIC each connected to ...
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23 views

Can connect to wifi but no internet on Kubuntu 15.04

I am on kubuntu 15.04 and I can connect to a network but I cannot access the internet. I can ping my local IP address and KDE Connect works just fine with my phone, but I cannot ping a website or go ...
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13 views

automatically select between wired and wireless networks

I am using ubuntu 10.04 LTS. I have two interfaces: one is wired and the other is wireless. When the two interfaces are up, ubuntu priorly select the wired to access internet. However, when the wired ...
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8 views

KVM Bridge DHCP - Connection on Host drops - Same IP address for br0 and eth0

I'm trying to create a bridge for a vm in Ubuntu 14.04. My original /etc/network/interfaces file looked like: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp And after modifying it, ...
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Trouble Connecting to Wifi on Kubuntu 14.04.02

I just installed Kubuntu version 14.04.02 on my Dell Latitude D630. The installation went fine, but I can't get it to connect to Wifi (or even turn it on for that matter) or bring up a list of ...
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6 views

MaaS DHCP node requesting wrong address

I'm having the exact issue identified in MaaS DHCP issue on 14.04 . The dhcprequest from the booted image is from the subnet that was originally used the first time that I built the maas server. I ...
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13 views

Wifi not working after upgrading to Ubuntu 15.04

I am facing this problem after upgrading to Ubuntu 15.04. I cannot connect to my institution's wifi. I have recently changed my WiFi's password.When I want to update the password It is not showing the ...
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1answer
16 views

Wireless Disabled in Ubuntu 15.04

I recently disabled Networking in my laptop (Acer Aspire V5); it turns on in no way. I reboot several times, I tried keyboard command, edit connection, enable networking of course; via terminal I run ...
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I have a Ralink Wireless Lan USB Adapter that I can't get to work no matter what I try

I am new to linux so there are many things that I may or may not have done correctly, but I have gone through many solutions on installing this driver for the USB adapter, however, I never have the ...
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9 views

Can't browse network from Nautilus

It's Ubuntu 14.04LTS. Long story short i uninstalled a lot of software by mistake. Among others i uninstalled unity, samba...even nautilus, then switched to tty1 and installed all that i could think ...
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17 views

Wifi networking

Wireless connection is provided in my college through a open connection that routes the data through a proxy. Is this setup more secure( or not) than the ordinary open Wi-Fi connections one comes ...
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27 views

How do I check the flow of internet through ubuntu?

I'm using my Ubuntu computer as a wireless receiver, receiving Wifi from my router and sharing my internet through a gigabit switch. How can I check or monitor the speed that I'm sending data to the ...
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5 views

Ubuntu OCS inventory ng on virtual machine ethernet doesn't work

It's my first time using this. I have big problem connecting VM to network. I changed network setting on VM to bridged, but whet i use ifconfig -a I only see local and eth2 (which does not have ip ...
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31 views

Internet problem in Ubuntu 14.04.2

Recently I installed Ubuntu 14.04.2 alongside Windows 8 and I'm having problems with the internet connection in Ubuntu. In Windows 8 works perfectly fine but in Ubuntu it doesn't. Well, I'm a noob in ...
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1answer
21 views

wired network connection in xubuntu not working with r8169

I am working on a brand new laptop with xubuntu 15.04. Wireless is working ok. Wired connection says connected when plugged in, and disconnected after 2 seconds or so. "Enable networking" is ticked. ...
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24 views

Home network Speeds (LAN and Wifi) very slow, Internet download is fast

Good evening, I have a home network hooked up and an ASUS (RT-AC68U) Wireless-AC1900 Dual-Band Gigabit Router with CAT 7 running throughout my whole house. My server is wired, Windows 10 machine is ...
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1answer
15 views

ubuntu 14.04 wireless disconnects after rebooting until router is switched off and on

I recently installed ubuntu 14.04 LTS along side Win8.1 on my new laptop. Wireless connection worked well for a day and then it started disconnecting whenever I downloaded something or restarted/shut ...
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1answer
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Can't reach tomcat server on Ubuntu 14.04 host from VirtualBox 4.3 Windows 7 guest or Ubuntu 14.04 guest

I've tried the following posts, as well as skimming through the VirtualBox manual: Windows GUEST accessing my local webserver on Ubuntu HOST? VirtualBox WinXP GUEST accessing HOST local webserver? ...
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1answer
12 views

How can I make Stream-Player play audio without a reboot when switching to mobile data?

I've got a BQ Aquaris E5 Ubuntu edition and I'm using Stream-Player to stream Internet radio while I'm on the go. I will usually start listening in the morning at home on Wi-Fi, and when leaving home ...
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1answer
39 views

SSH and VPN Cisco connection working on one laptop but not on another. Both laptops using Ubuntu 14.04. Where is the difference?

I'm trying to SSH to our university server using VPN and WIFI connection. The bug is similar to this one, although different in details. The problem is as follows: Me and my colleague are using ...
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1answer
26 views

How to log in to an internet provider with with a password and user name through terminal?

I have an account through a wire network internet provider - a person that have an internet LAN and share it with neighbours in exchange with money - every one of us have an account and a password , ...
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17 views

Wifi and Bluetooth Not working on Ubuntu 14.04 but working on Windows 8 [duplicate]

Even after updating with sudo apt-get install update (while connected with wired network), it still does not see available wifi nor does the enabled bluetooth able to find any bluetooth, just ...
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35 views

Ubuntu 15.04 destroys my Wi-Fi

I have ubuntu 15.04, my Wi-Fi adapter is ralink rt5390. lshw -C network output: *-network description: Wireless interface product: RT5390 Wireless 802.11n 1T/1R PCIe vendor: ...
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17 views

Wired Ethernet not detected for specific modem Ubuntu 14.04

I have a dual boot system with Ubuntu 14.04 & windows(ethernet & wifi works perfectly in windows) The wifi is not working in Ubuntu so I use ethernet cable. The Ethernet at my office ...
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1answer
23 views

Can't connect to VPN using Checkpoint SNX

I've been using Checkpoint SNX to login into a vpn for the past 6 months and today upon using the command snx -s "my vpn" -u "user" the program appears to just fail without error or any kind of ...
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26 views

resolv.conf is merged from two networks

On a corporate network, when I connect to it via DHCP via a wired connection using Ubuntu 14.04.2 LTS I get the following in /etc/resolv.conf nameserver 192.168.2.254 nameserver 127.0.1.1 search home ...
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8 views

Open Swan - L2TP/IPSEC connection drops Ubuntu Studio 14.04

Since I cannot get an ipsec connection using strongswan I rolled my machine back to openswan and am using the Werner Jaeger L2TP IPsec VPN Manager 1.0.9. Not too sure where to go from here - for the ...
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Ubuntu internet stops working after a few minutes. Wifi stays connected though

Recently, the Internet was been acting strange on my Ubuntu partition. It works 100% fine when I dual-boot Windows, but the Ubuntu partition connects to wifi for an indeterminate amount of time (0-10 ...
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1answer
22 views

wifi and ethernet keep disconnecting

I don't know if this has been asked before, but the internet (ethernet and wifi) is constantly disconnected. I've checked the router, via other devices (such as cell phone and tablet) and access to ...
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15 views

Port Forward Flask Server in local network

I have a Flask app from flask import Flask app = Flask(__name__) @app.route('/') def index(): return 'Hello, world!' if __name__ == '__main__': app.run(host='0.0.0.0', port=7777, ...
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7 views

Ubuntu 12.10 Hotspot support WEP / WPA

I'm following this tutorial : http://ubuntuhandbook.org/index.php/2014/06/share-internet-with-android-ubuntu-1404/ and I've managed to get my hotspot running (sharing ethernet over wireless). ...
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1answer
29 views

How can an IP address be statically assigned in Ubuntu 15.04 server?

I installed Ubuntu 15.04 mini in a Virtualbox VM with the network bridged. The install automatically enables DHCP which works fine. In order to statically assign an IP address, I edited ...
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Cloned server cannot connect to network

I have set up a server running Linaro 12.07 (based on precise). I installed avahi-daemon so that it can resolve hostnames of my other machines. It's network connection works fine and connect to other ...
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1answer
19 views

Using a secure FTP connection without SSH

I have been working for a few weeks on a peace of software that transfers files using FTP. I have looked at the FTP Server page and noticed that the FTP that Ubuntu uses does not support a secure ...
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2answers
22 views

SSH to network alias ssh_exchange_identification: read: Connection reset by peer

New install: Ubuntu 14.04.2 LTS (GNU/Linux 3.16.0-45-generic x86_64) I have no problem with SSH to the DHCP address .22, but when I try the alias address .80 the connection is reset by peer. I've ...
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1answer
32 views

ubuntu 14.04 bluetooth BCM43142 no discovery (tx timeout)

i was browsing many posts regarding the issue, though i could not find a monolithic answer. the issue: unable to discover\detect other bluetooth nodes. information: $ uname -r 3.13.0-59-generic $ ...
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1answer
23 views

I can't access the internet in ubuntu 10.04 [on hold]

I can't access the internet in ubuntu 10.04 I got a book from a shop. Then i open the window edit connections. The book told as there will be a connection "auto eth0". But there is no connection such ...
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Why am I frequently getting disconnected from wifi after some time of use? [duplicate]

I use a Lenovo g50-45 with Realtek Semiconductor Co., Ltd. RTL8723BE PCIe Wireless Network Adapter. I am connected to the wifi and can access the Internet for like 10-5 min and then the wifi will ...
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1answer
53 views

Two IP for each interface?

I have edited my interfaces file in order to set a static IP for my network interface card. auto eth0 allow-hotplug eth0 iface eth0 inet static address 192.168.1.100 netmask 255.255.255.0 network ...
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1answer
43 views

Is the file '/etc/network/interfaces' ignored when I use the Network Manager?

I had this configuration in a server /etc/network/interfaces auto em1 iface em1 inet static address 192.168.1.250 network 192.168.1.0 netmask 255.255.255.0 broadcast 192.168.1.255 ...
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cannot access through telnet from ubuntu 14.04 to windows 7

I have this HW that i need to connect ubuntu and windows 7 from Telnet protocol to each other. Till now I have made this possible to open my terminal from windows 7 and it worked just fine. but when i ...
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Setting up firewall for my hosting

I am having an Ubuntu 14 instance installed in Amazon Cloud. In there, I have setup apache2,tomcat7, and phpmyadmin. Any request to port 80 will be forwarded to the tomcat based java application. ...
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14.04, wifi disconnected, atheros ar5008, CAN'T SLEEP!

Two days ago I started computer and found the wifi disconnected. I couldn't even figure out a reason since I didn't do anything, I didn't update anything, I didn't change any settings, and it just all ...
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10 views

bluetooth does not connect phone and speaker, and the wifi freezes the laptop when switching a network

I have Ubuntu 15.04 installed on a lenovo yoga3pro. It recognises, but it does not connect to my phone (iphone 5s) and speaker (envaya denon). the wifi freezes the system most of the time when I ...
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2answers
35 views

SSH to local ip in external network

I know there is a lot of information about this subject but still I do not understand something. We have internal wiifi network that include 4 desktops, each one has internal local ip address. The ...
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14 views

Ubuntu 14.10 wifi keeps disconnecting [on hold]

Every so often, my wifi will disconnect. I have posted the output of "lshw -C network" and "uname -a" below. sudo lshw -C network *-network description: Wireless interface ...