Managing and using network connectivity on a Ubuntu system

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SSH and VPN connection working on one Ubuntu 14.04 laptop but not at another Ubuntu 14.04 laptop - What is different?

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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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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Wifi and Bluetooth Not working on Ubuntu 14.04 but working on Windows 8

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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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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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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8 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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15 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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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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8 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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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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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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22 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
16 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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1answer
9 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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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
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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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41 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
41 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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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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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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Ubuntu 14.10 wifi keeps disconnecting

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 ...
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Internet Connection not being picked up

My dad has ubuntu installed on his PC, and up to now we haven't had any issues with it. However a couple of days ago it auto-updated to a new version of ubuntu. Looking at the details in settings, it ...
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Modem 4G (HiLink) + network-manager

How establish a connection (internet) with this type of modem (HiLink) and network-manager? Doesn't matter how I try modem disconnects after few seconds. ł.o.
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1answer
93 views

Can't Connect to Samba Server After Setting Up VPN

I had installed Samba by following this guide: Samba Guide for a while on my ubuntu server now, everything works fine until I installed OpenVPN to my server recently. After I have installed OpenVPN ...
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Internet comes and goes after update to 15.04

I recently upgraded to 15.04 with a Mac. At the beginning I had no internet at all but fixed that by isntalling manually the drivers from my wired connection. However now with both WiFi and wired ...
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Need help installing drivers for an Archer T2U wireless adapter!

I had an old computer running WindowsXP, and I wanted to add some life to it and finally expose myself to a Linux OS or something similar, maybe learn something from the experience. So I got a Lubuntu ...
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28 views

(Ubuntu 15.04) wireless connected but no internet access

i'm using ubuntu 15.04 vivid, I'm connected to the wifi but when I open Firefox, it said "Server not found", I open Software Updater it said Failed to download, basically no internet access. But I've ...
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Fast & Traceable copy of 2 TB data over Gigabit LAN from Ubuntu live mounted Volume to Synology NAS (Win SMB, NFS, Mac AFP)? How?

Fast & Traceable copy of 2 TB data over Gigabit LAN from Ubuntu live mounted Volume to Synology NAS (Win SMB, NFS, Mac AFP)? How? I am going a Data Recovery using a Unbunto Live CD (14.x LTE) ...
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1answer
24 views

connect to wlan0, and eth0 as safeguard in etc/network/interfaces

I am currently running rpis headless that send data over ethernet to a server that is also connected to the router through ethernet. Using a usb wifi adapter and keeping the same IP address, i would ...
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16 views

What remote host allows tunneling thru ssh with public key and password?

I need a virtual desktop that can only be accessed by having the ssh public key and the user password. I was trying remmina but it does not seam to support the dual authentication of public key and ...
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1answer
27 views

wlan0 is missing

My laptop wlan0 missing after apt-get upgrade. It works well before. ifconfig only lists lo and eth0 now. iwconfig give no wireless extension error. $ iwconfig lo no wireless extensions. eth0 ...
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Problem with PBISOpen and Ubuntu 14.04LTS

Good morning I'm testing openpbis 8.3 version and i have authentification problem when i'm trying open new session on Ubuntu 14.04LTS, not in local netwark but only in distant network. Adding the ...
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net isp balance dependencies

I am trying to setup the http://lstein.github.io/Net-ISP-Balance/ in an Ubuntu server 12.04. I have a few problems during the installation. I got some errors that I cannot find a way to solve them. I ...
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1answer
28 views

Can't connect to WiFi with “Connection activation failed” error after upgrade from 14.04 -> 15.04

I recently upgraded from 14.04 to 14.10 to 15.04 in succession. I lost internet capabilities each time, thanks to my having to use a Realtek WiFi dongle. I was able to resolve those issues both ...
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New installation of Ubuntu Kylin doesn't recognize Huawei 4g wireless b/b modem (Lenovo 7303 Desktop)

I've been away from Linux for a little while but I've installed Kylin 14.04.2 64bit alongside win7homepremium 64bit. I had to install them both twice as I wanted to upgrade to win7ultimate while I was ...
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Remote Desktop and Printing

I want to connect to Windows Computers using any Remote Desktop clients over a WAN connection from anywhere around the world. I used 2x, Remotedesktop Client and even remmina, But they all turn out to ...
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23 views

PFsense not working. Squidguard stopped

Hi I had tried to test the PFsense in VM VirtualBox. Let me explain the setup as follows: 1: PFsense installed VirtualBox (Server) em0 - 172.1.1.93 [WAN] vtnet0 - 10.10.10.1 ...
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1answer
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can't run interface and virtual interface at the same time

So I am trying to create an ad-hoc network between a couple of devices. I also need to run hostapd in order to capture probe request packets. I have a wireless adapter (TL-WN722N) that is capable of ...
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Wifi stopped working after resume or reboot Ubuntu 14.04

I have a dell vostro laptop with Ubuntu 14.04 dual boot with windows (wifi is working with windows). The wifi stopped working after resume/reboot. Wifi is unable to detect any networks. PFB the ...
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No wifi networks detected after Ubuntu 14.04 upgrade [duplicate]

Since I clean installed Ubuntu 14.04 my laptop is now no longer able to detect wifi networks. I can use a wired connection, however. It's a Realtek wifi device. I've seen lots on Broadcom issues but ...
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Ubuntu 14.04 LTS - setup as proxy server

I am new to Linux. I want to configure my machine (Dell OptiPlex 780 with 4GB of RAM and 1TB HDD - two network cards) as a proxy server for my home network. What is your recommendation on how to ...
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14 views

How to keep alive a wifi connection on a laptop

I have a Dell Mini 9 running Ubuntu 14. The wifi seems to work well, but only as long as I use it. I've noticed that if I leave it idle, and then try to ping or SSH into it, it's disconnected from the ...
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Why does ubuntu's wireless work horribly? [on hold]

It doesn't matter if I use LTS or not. It doesn't matter what hardware I've used. After about 6 months ubuntu seems to forget how to connect to my router even though nothing has changed since the day ...
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Cannot connect to internet due to route table oddness

Environment: Ubuntu 14.04 Problem: I want to connect to my VPN at work from home. Whenever I connect to my wireless, my route is set up to the work route. The home gateway is supposed to be ...