Managing and using network connectivity on a Ubuntu system

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Failed to connect to Cisco anyconnect VPN via openconnect

I've read several texts about this on the web and this site but couldn't solve the issue.I have network-manager-openconnect and network-manager-vpnc plugins installed on Ubuntu 14.04 (for GUI usage). ...
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OSError: [Errno 101] Network is unreachable

When doing a network broadcast from Python, I get this: OSError: [Errno 101] Network is unreachable My code is as follows: def send(ip, message): sock = socket.socket(socket.AF_INET, ...
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Resetting all network settings

Recently I have been getting into Linux and I downloaded an extension in Firefox on my Ubuntu that was proxy. The proxy wasn't working right so I removed it but noticed that afterwards with the ...
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1answer
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sudo apt-get trying to connect through old proxy

I previously had a proxy set-up when visiting somewhere for work, to use the internet there. I have since returned, and I thought got rid of the proxy. However today when I try to run sudo apt-get ...
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iptables/netfilter: What's the difference between PREROUTING and FORWARD?

I am trying to understand how this system works and I have problems to understand the difference between using NAT PREROUTING or filter FORWARD. From what I understand, the PREROUTE can send the ...
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Wireless hotspot not supported after upgrade to 14.04!

I used to use ap-hotspot on my laptop with Saucy without a problem. Now that I upgraded to 14.04 and installed ap-hotspot I get this error: Your wireless card or driver does not support Access Point ...
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my web browser is unable to load askubuntu.com

i installed Ubuntu in my hp pavilion g laptop.i am using Mozilla Firefox i am able to connect other websites but askubuntu.com web page is not opening in my laptop.please help to solve the problem.
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Power went out, Network Manager service went haywire. Reboot wouldn't bring it back up, but restarting service did. Why would this happen?

This is kind of strange. My power went out randomly yesterday for a split second. My server came back up and it would not connect to the network. I couldn't ping out from the server, it wasn't ...
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14 views

Realtek Ethernet card disconnnects randomly

My laptop has a Realtek RTL8168 Ethernet card, which works pretty well. Except at some times, where the connection just gets dropped and I have to un- and replug the cable in order to reset the ...
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32 views

Samba shares not accessible from Windows 8.1 with Ubuntu 14.04 LTS

Here is my smb.conf file as obtained after using the "sudo system-config-samba" command # # Sample configuration file for the Samba suite for Debian GNU/Linux. # # # This is the main Samba ...
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Software for Network Infrastructure Discovery

Which software is the best for create a network map in ubuntu? I have bachelor thesis in college, theme is Network Infrastructure Discovery. I must create a network map, automatic discover devices on ...
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Ubuntu WiFi fails to connect

###Read Edits below### initial post I'm using 14.10 ubuntu and it is dual booted with windows 8.1, my issue occured "randomly" (being careful using that word - i dont remember if i did anything ...
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Ubuntu 12.04 LTS scripts in /if-up.d not executed

Since this morning have been trying to achieve something: System: Ubuntu 12.04 LTS, Network-Manager is not installed Goal: Every time, the eth0 network interface is started (if-up.d) we want to ...
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32 views

Network card wifi not working

My wifi is not working and I have a Compaq Presario C500 and my network card is a Realtek RTL8139/810x family fast Ethernet and Broadcom 802.11b/g WLAN. UPDATE: lspci -nnk | grep 14e4 says 06:00.0 ...
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How to install CISCO PACKET TRACER for 14.04 64Bit?

I have Computer Networking subject this time, and we will be needing the CISCO PACKET TRACER software. I searched a lot of websites and Ubuntu ques, but none of them were helpful for me. 1) Where do ...
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29 views

Network Failure after Update

Follow up to: this question: After uninstalling a load of packages in order to free space on /boot for upgrades etc. I loaded Ubuntu software manager and was prompted to install an update, which I ...
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14.04 Can't login after NVIDIA install + Network not available

I have tried to install NVIDIA (for using CUDA) on my notebook running 14.04. I took the driver from here and hopefully followed the steps from the second answer here. I did this after I first tried ...
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How do I setup a VPN server on Ubuntu with No-IP?

All the installation guides for VPN servers I can find go into huge detail about how to setup an IP address range. If I'm using No-IP to give my PC an IP address is there a simple way to setup a VPN ...
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USB ports not working properly on Ubuntu 14.04, Fn keys stopped working

I was using my machine and everything was working just fine but at some point of time (I don't recall changing anything in the system) USB ports just stopped working properly: I was connecting ...
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1answer
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Counting printed pages on a network printer

In my company I have a printer connected to a PC with Lubuntu and this PC is connected to internal network. I would like to make the printer accessible via this PC, however, not just make it a shared ...
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interface device name em1 to eth0 linux 14.04 lts

I Have installed Linux 14.04 lts. I am getting interface device name as em1 and eth0.I want to rename it as eth0 and eth1.
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1answer
18 views

Make internet app available only within VPN?

I am not sure if I expressed myself clear enough in the question. Just managed to set up PPTP on my server and I want to know how can I make a website be accessible only from VPN clients. I have ...
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24 views

OpenVpn bridge problem - Server behind NAT - Client can ping server, default GW but nothing else

first of all, yes I have been searching.. The issue is with setting up OpenVPN in bridged mode on ubuntu Server 12.04. It generally works, I can connect, I get an IP and can ping the OpenVPN server ...
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62 views

Wifi doesn't work on Ubuntu 14.04 anymore!

I've been struggling with my wifi for a week now. Since we changed router and provider(O2 box 6431), the connection doesn't work on Ubuntu anymore, yet it does work on windows (and also on ubuntu with ...
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Problems connecting to my school's wifi.

So I have a lenovo yoga 2 pro with Ubuntu 14.04 installed, and so far I have had to blacklist ideapad_laptop to unblock my wifi adapter. Now I'm having a hard time connecting to my school's secure ...
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Wifi is connected, but after a while ping to access point doesn't work. (Ubuntu 14.04 LTS)

I have an Asus G55V laptop on which I installed Ubuntu 12.04 LTS and which I upgraded to 12.04 LTS last summer. I have the laptop for almost 2 years and so far I had no wireless connection issues ...
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Error fetching interface information: Device not found

Running 14.04 on VMWare player, I am trying to configure a new Ethernet device eth1 through editing /etc/network/interfaces. I have configured a device for eth0, and that is working properly. Here ...
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loading “explicit” iptables rules on boot or interface up

I'like to load iptables rules on boot or interface going up on Ubuntu. Made a search on StackExchange and other places and looks like the most commonly agreed approach is either use ...
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Wifi Intel Centrino N-2230 not working on Dell Inspiron 17r SE on Ubuntu 14.04 LTS

I had to reinstall my Ubuntu system because it was not working properly so I did with a USB installation and I kept my old /home. The Wifi was working good on my 14.10 system and even in Live CD but ...
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Linux Ubuntu with two Interfaces

I'm trying to get NOGOTOFAIL to work with testing Android and I'm trying to follow the walkthrough. The part I get stuck is here: Run nogotofail on a Linux machine with two network interfaces. This ...
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19 views

networking Lubuntu to win7

I have tried to get my head around Linux before and would like to try again. I have installed Lubuntu on an a old P4 pc to use as a backup/NAS for a Win7 PC. I have installed it with 3 IDE drives and ...
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Why wireless driver doesn't work

There's a problem with wireless that the ifconfig doesn't show any wlan interface. I made sure that the interface is up by using : ifconfig wlan0 up and the result was something like : wlan0: ...
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27 views

large network latency on localhohst

I have a laptop, which I want to optimize for voip applications. I experience the problem that applications connecting to localhost suffer from large delays. Basically nothing happens for about 2-3 ...
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ownCloud on Ubuntu 14.04 - ban mechanism?

I have a question regarding ownCloud 7.0.4 with Ubuntu 14.04 Sometimes when I upload or download larger files (like > 300 MB) to ownCloud i get disconnected from server. It looks like my IP gets ...
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1answer
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Ubuntu 14.04 D-link Dns323

I've been trying to connect to my dns323. I use to have it connected through my wireless router but i moved and no longer have internet but still want to be able to connect to my hard drives in the ...
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38 views

Ubuntu installed on Vmware cannot get access to internet

I installed Ubuntu 14.04 on Vmware, the host machine is Windows 7. However, I cannot get access to internet from Ubuntu. I am not clear how to identify the cause and fix it? Thank you for the help. ...
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ARP flux how to solve

I have a server with 2 NICs having an IP address in the same subnet, this is what my /etc/network/interfaces looks like: auto eth0 iface eth0 inet static address 192.168.2.155 gateway ...
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22 views

Wifi connection deauthenticated by router

I use ubuntu 14.04 and I have an Acer V3-571G laptop. I have an O2 Box 6431 modem which I have received from O2. My wifi connection works fine except when I restart ubuntu or laptop. Next time it does ...
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use eth0 and wlan0 at same time

I have a Raspberry pi and I have connected it to my laptop via LAN cable in order to remote it, on the other side I want to use my WiFi to use internet. When I connect to both of them one of them ...
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how route between virtual machines in one system

i have one system that works like a gateway . but i want before packets come into my network by this gateway packets be processed by some function , so i want to install 4 virtual machines in my ...
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1answer
85 views

Installing the driver for TP-LINK TL-WN727N on Ubuntu 14.04

I am new to Ubuntu and I have problems with my Ubuntu 14.04. I plugged my wifi adapter but it did not work so I guess I need to install the driver manually but I don't know how to do it. I currently ...
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wondershaper doesn't work for redirected traffic

I'm trying to prioritize my network so small packages get through quicker so latency-dependent applications don't get unusable when downloading/watching videos. I want to use one pc(with one nic) ...
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Wi-Fi connecting problem

I am using a USB dongle with AR9374 chip set on it. The Problem is, I can't get it connected to a AP. I have tried to create a wpa_supplicant.conf file in /etc/wpa_supplicant.conf but doesn't work. ...
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1answer
34 views

Bind9 and Name Collison

I have setup BIND9 as a DNS server for my home network so I can reach other machines via their hostnames. All hosts are on a private network with the domain name hive.local, each reach the global ...
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wicd on ubuntu 14.04 takes too long to connect to wifi

During install of ubuntu 14.04 LTS from a mini.iso I inadvertently managed to change the number of seconds required for connecting to wifi. How do I, post installation-wise, change the number of ...
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IPv6 connectivity drops after 12 hours

I have a VM running Ubuntu Server 12.04.5 LTS. For the last few days the server looses IPv6-connectivity 12 hours after the network restarts. If i restart the network with sudo /etc/init.d/networking ...
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monitor network connectivity faults?

I am suffering poor connectivity when i work at home. Frequently I see write failed broken pipe and other errors indicating that Ive lost connection. I would like to complain to my service provider, ...
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Ubuntu 12.04 Wifi connects but data does not flow

I have installed a new router that is an ASUS N65U with a custom firmwware from Padavan. Every device in the house connects to it fine and has no problems except my main Ubuntu laptop. It does not ...
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30 views

How to access the router UI when it's IP address says “the webpage is not available”? Its not just plug and play as in windows?

I have some TPLink access points (and a travel router that can work as an access point), and want to configure them in order to extend my wifi signal. In windows I just plugged them into the ...
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Ubuntu 14.04.1 LTS has problems connecting to wifi network

It(could not connect to the wifi network) started occuring recently (maybe after some update) that system has problem with wifi connection. I have no idea what solves this but sometimes I have to ...