Managing and using network connectivity on a Ubuntu system

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managing an LTSP Edubuntu server with thin clients

Hello there I am hoping some one can help me. I have set-up and Edubuntu LTSP server in my schools IT room which is working fine as it should, but I wish to be able to turn the server login screen to ...
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Wireless Authentication through Website

Our WiFi network at our university requires you to go to a website and enter a username and password to authenticate. When I try to connect to the WiFi network I get the "Wi-Fi Network Authentication ...
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Cannot Ping Outside from Guest throught host

I set up 2 virtual machine with the following IP: 1) IP: 192.168.20.50 SM: 255.255.255.0 Gateway: 192.168.20.100---Connection type=Bridged; 2) IP: 192.168.20.100 SM: 255.255.255.0 ---Connection ...
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Using two different internet connections (no load balancing)

is there an easy way to set up two different internet connections on a server? I have a Cubieboard 4 running Linaro's Ubuntu Server Port. It was installed and configured using only it's ethernet port. ...
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1answer
10 views

Is it possible to define a fallback gateway server?

I'm using iptables to implement forwarding on one server, that is support to forward traffic from an internal network to the internet (tutorial: http://www.revsys.com/writings/quicktips/nat.html) On ...
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How does software autodiscover devices connected to a NIC?

I have an Allied Vision camera and I'm able to connect it to my ethernet port on my computer and their software is able to find it. How do they do that? The reason I ask is because I have a computer ...
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2answers
29 views

Need help figuring out why I can't putty to my 14.04 server

I have just installed 14.04 LTS server for i386. I am new to Ubuntu. The installation went good. I am able to login. I ran ifconfig and it returned an IP of 192.168.254.19. I started Putty on a Win7 ...
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1answer
47 views

Wireless Internet not working Acer Aspire R5

I'm so new to Linux that it should be illegal for me to post on this forum. I bought this Acer Aspire a few months. It came with Windows 10. I obtained a virus after I removed my anti-virus soft ...
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WiFi works only after reinsatll

I am facing a strange connectivity problem. WiFi gets connected on my Ubuntu 14.04 but there is no internet. All other devices can connect to the same network. I reinstalled the Ubuntu desktop and ...
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1answer
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copy network setings from live usb

Live usb works fine on my pc. My regular ubuntu 14.04 installation suddenly lost network connections. I do not see the two arrows at the top right. eth2 does not appear in ifconfig. Instead of ...
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Server gets overloaded with rsync and stops taking connections

I have a backup server in AWS where I rsync data from 20 servers hourly, so it has a hefty task. For the most part it works fine but then every few hours it locks down and stops accepting ...
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apt-get update failure, unable to connect proxy addess

I have a dual boot (Windows 7 professional+ Ubuntu server 14.04) Dell Precision Tower 7810. The machine is connected to proxy server (http://192.168.128.1:8080) via LAN (static IP). My machine is ...
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Xubuntu 15.10 - WiFi working but not Ethernet [duplicate]

I upgraded from Xub 14.04 LTS to 15.10. The ethernet in 14.04 used to work, albeit slower than the Windows 10 installation on the other partition, but now it just doesn't work on the Xubuntu side. The ...
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21 views

Skype does not see online internet ( Skype can't connect ) [duplicate]

At the moment, there are two established programs at OC 1 - Chorme, 2 - Skype.Tried to install Skype in different ways, through the terminal, Software Center, deb package, but all to no avail ...
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1answer
11 views

Use USB port of raspi from ubuntu 15.10

I am trying to export a USB port over IP from raspi and use it on ubuntu. On the raspberry pi I can start the daemon using > sudo usbipd usbipd: info: starting usbipd (usbip-utils 2.0) usbipd: ...
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26 views

Multiple connections per ip

I am running Ubuntu with a webserver (Nginx). I noticed that one IP has multiple connections opened. My server works all fine and there is no issue. I am just curious to know why there are many ...
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21 views

Traffic control using TC/IPtables mangle [on hold]

I want to control TCP Packets/KBits and/or Kbps traffic coming to port 7171 per minute. I am a new Linux user, I host a game-server on Ubuntu 14.04 Can someone help me, please? I have been looking for ...
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Can't access internet through wi-fi after some time connected [duplicate]

My problem is similar to this one but my wireless connection doesn't straight out disconnect. It appears to be ok looking at the wi-fi symbol at the upper right corner but after some time I can't ...
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1answer
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How can I get eth0 interface

I try to get MATLAB running in Kubutu but there seems to be a problem with the network interfaces. MATLAB support told me that there must be an interface called "eth0" but I have only an interface ...
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13 views

VPS IP address for local site

I have no experience in about Apache and want to set up Apache Virtual Hosts on Ubuntu 14.04 LTS for a local site on my local machine. I followed this page. But when I try to test http://example.com I ...
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22 views

Not able to connect with wifi .Wireless network problem

I recently bought my Ubuntu laptop . I am not able to connect with my wireless modem .any suggestion will be help full It is showing connected from terminal(using some basic network command like ...
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29 views

When lid is closed, no internent connection

new to linux and ubuntu so please show some understanding :) im using an external monitor with my laptop, and when i close the lid (already set up the power management so nothingks will happen when i ...
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TCP/UDP Packets Ubuntu 14.04

I am hosting a game-server on ubuntu 14.04 Can I control the UDP/TCP Packets per minute/second on port 7171? Players use a lot of packets to lag/crash my game-server and when it reach the maximum ...
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1answer
14 views

bridge and LXC container on two cloud server

I have problem with the configuration of bridge and lxc container on cloud server. I Have two cloud servers. On each cloud I've created bridge by brctl like: brctl addbr $bridge ip addr add ...
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No network connections after update

Installed the requisite updates yesterday and my wifi disappeared competely. No icon in the top right, and nothing under settings and network. Is there a fix? If not, is there a way to revert to the ...
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Unable to create hotspot in ubuntu 15.04

My laptop is having Broadcom BCM43142. I used KDE connection editor for adding info like ssid, password and other hotspot related stuff. But now when I try to start the hotspot by using create new ...
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Wifi indicator in status line missing [duplicate]

I use Ubuntu 14.04 for quite some time now, and suddenly my Wifi Indicator in the upper status bar is missing. It disappeared by itself. I searched for solutions and tried these two: 1)sudo service ...
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Diskless Problem Network

I'm new on the askubuntu.com and I want to expose my problem. I'm sorry for my poor english. I have a big project to implement a big cluster calculations. I'm stuck at a part, let me explain. The ...
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7 views

Restricting the Number of IP/TCP Connection Request Per Second Using Ubuntu Sever

I know what type internet connection my machines have and how much CPU/RAM they are using. So Is it possible to restrict the accepting number of IP/TCP connections per second at the OS level, before ...
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how to set persistent route

I am running ubuntu 14.04. I have seen other threads and tried all alternative solutions but no luck. At interface level i have tried route/up route/post-up route command, but nothing lists on ...
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After motherboard replacement, how do I fix my wired network?

Recently the motherboard and hard drives were replaced from my HP z820 workstation. Ubuntu 12.04 is installed on a seperate (not replaced) ssd drive. Before this replacement the wired internet just ...
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1answer
62 views

Install Intel AC 8260 wireless drivers offline

As my laptop does not have Ethernet port, to set up wireless, I need to install drivers offline. My Ubuntu version is 14.04.3, and kernel version is 3.19.0-25-generic. Output of the command: lspci ...
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59 views

Setting up Static IP Address for Wireless in Ubuntu 14.04

I've attempted to set up a static ip address for my home computer (Ubuntu 14.04 LTS), and have followed a few online instructions to no avail. my interfaces file was : auto l0 iface lo inet ...
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No Wi-Fi options on HP 450 g3 i7 with Ubuntu 15.04

I just bought a new laptop HP ProBook 450 G3 Notebook PC i7, and installed Ubuntu 15.04 on it, but after installation it's not giving me any options for connecting with Wi-Fi. I have tried every ...
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Unable to create hotspot in ubuntu 14.04 using bridge mode

sample diagram: Internet ---> ADSL Router ---> (eth0)+----(Ubuntu 14.04 machine)----+(wlan0 :- WIFI-HOTSPOT) ----->| | |----> +(wireless interface of mobile1)---------(mobile1)----------| | |(wlan0 ...
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Possible to let network-manager indicator display status of bridged network?

For my VM, I set up bridged networking by modifying /etc/networks/interface as below: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback auto eno1 iface eno1 inet ...
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Getting a Network Cable Unplugged message

running ubuntu 14.04 LTS with an asus motherboard it has a Reatek dual gigabit LAN controlers RTL8187 and marvell 88E8056
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Edit wired connections: IPv4 settings: Manual: Routes button

There is a "Routes" button in my Ubuntu 12.04LTS here: Edit Connections>Wired>Edit>Ipv4 Settings>Manual>Routes button Inside the Routes button I can add IP address, Netmask, Gateway, etc. I wonder ...
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Avahi local name collision

I have defined a subnetwork on my server, using ip aliases for a single ethernet card. Today, after a reboot, the avahi daemon is not resolving host names anymore. The hosts defined in ...
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1answer
30 views

Update made my network stop working and receiving internal error message [duplicate]

I was notified with a bunch of updates just half an hour ago, mostly security updates in nature. Without thinking much I authenticated the installation. It required me to reboot to apply the changes. ...
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55 views

Can't access internet even though the computer is connected to an ethernet

I have dual-booted Windows 7 and Ubuntu 14.04 LTS. In the early phase my wired connection used to work in both Windows and Ubuntu. But now it is only working correctly on Windows. On Ubuntu there are ...
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Kernel panic on Ubuntu 15.04, possibly due to Gnome

I'm running Ubuntu 15.04 with Gnome Desktop 3.14.4. I get a kernel panic whenever I switch Wifi networks e.g. if I try to load a webpage over a slow network, and I switch to another network without ...
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Slow WiFi on ThinkPad X201 with Ubuntu 14.04 LTS and Intel Centrino Ultimate-N 6300

I thought the problem might be related to my ThinkPad's original Intel Centrino Advanced-N 6200, so I replaced it with the current Intel Centrino Ultimate-N 6300, but the problem persists. Even though ...
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55 views

Qualcomm Atheros AR9565 Wifi Adapter. Can't find drivers

I am simply looking for where I can download the drivers(source code is fine, doesn't have to be precompiled) for my wifi adapter. My laptop manufacture is Lenovo and the model is Z50-75. The wifi ...
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30 views

Pesonal wifi on school network [on hold]

Im trying to run a personal wifi network on my raspberry pi 2 at my school. I will have it connected to the ethernet but it runs through 802.1x network authentication. any help is appreciated
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No Wireless after 3.13.0.77 Kernel update on Ubuntu 14.04.3 [duplicate]

After an update 2 days ago I have no wireless and not even the indicator in the top panel. This is on a Ultrabook with no ethernet, so there is no Internet at all. The results of a script I found ...
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1answer
19 views

Apache just working with private IP

I've just set up a new server, which is at my home, with Ubuntu in order to host some databases and a little website; I've done that many times with VPS but never with a machine in my own network. ...
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2answers
35 views

Ethernet not working or even showing up. 14.04 LTS. Dell Inspirion E1505

I installed Ubuntu 14.04 LTS on a Inspirion E1505 and when I booted to the install drive it recognized the Internet just fine. Now that I have it installed, not so much. When I run ifconfig it only ...
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Xubuntu 14.0.3 lost all network connectivity [duplicate]

I'm running Xubuntu 14.04.3 on a Lenovo G50-70 updated earlier today, but I don't think any updates to the Kernel. I shut the laptop down, and had to leave for a wile. When I turned the unit back ...
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1answer
19 views

Ubuntu network performance on over 2k connections

I'm using an EC2 c3.8xlarge Ubuntu 14.04 LTS machine with over 3k threads simultaneously downloading web pages one after another. Although this machine should have a 10Gb network performance, I ...