Managing and using network connectivity on a Ubuntu system

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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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30 views

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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0answers
25 views

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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0answers
22 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
17 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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1answer
31 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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0answers
25 views

Traffic control using TC/IPtables mangle [closed]

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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22 views

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
33 views

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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19 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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24 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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25 views

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
19 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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0answers
31 views

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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20 views

Unable to create hotspot in ubuntu 15.04 [duplicate]

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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10 views

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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22 views

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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10 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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15 views

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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0answers
10 views

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
137 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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1answer
63 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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1answer
67 views

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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16 views

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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11 views

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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14 views

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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12 views

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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38 views

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
32 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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62 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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8 views

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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23 views

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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78 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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31 views

Pesonal wifi on school network [closed]

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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16 views

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
21 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
38 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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6 views

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
21 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 ...
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2answers
121 views

Intel Corporation Wireless 8260 [8086:24f3] (rev 3a) [duplicate]

I installed Ubuntu on the new Lenovo miix 700 and haven't been able to get the wireless working. I used to have to remove and blacklist the ideapad_laptop wireless driver/controller with sudo modprobe ...
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13 views

Recent update of Ubuntu lead to network connnection crash

I updated my ubuntu 14.04 several days ago, and after the update, my wifi icon disappeared, and there is no internet connection after all. It is not just a simple show-icon thing, I think it is a ...
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2answers
48 views

Re-Installing Network Manager via Live USB?

I don't know what happened, but when I got back from suspend, suddenly network manager was deleted on my ubuntu 14.04. So, looks like it needs a reinstall, however, I don't have the packages saved ...
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10 views

Problem routing between wireless and wired nic

I have a complicated network setup and I'm searching for advice on a partial problem. My Ubuntu server has a wireless NIC (wlan0) and a wired NIC (eth0). I want to connect a wired subnet to eth0 and ...
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67 views

Not getting Enable WiFi option in Ubuntu 14.04

I have recently installed Ubuntu 14.04 LTS. But Enable WiFi option is not coming. I have tried various commands to get the info as much as was possible for me. Wireless Info Script Data ########## ...
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31 views

REALTEK Ethernet Controller driver not recognized

I am running ubuntu 14.04 kernel 3.19 x86_64 architecture. Suddenly my Wired Connection stopped detecting. Reading several threads I removed r8169 and tried to install r8168. I have read many threads ...
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1answer
34 views

rtl8192cu Ubuntu Mate 15.10 issues

I have an Edimax Wireless adapter that uses the rtl8192cu driver. I followed the instructions provided in the post: NETIS WF2120 Wifi Adapter Drops Signal Within Seconds I even went as far as ...
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0answers
24 views

Wi-Fi internet connection extremely slow with one network in Ubuntu 14.04

Since I moved out to a new place for a secondment I experience problems with internet connection on my Ubuntu 14.04. On the same network (Mariam) with the phone I get around 20 Mbps in download and ...
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0answers
20 views

IPTables forward port to another ip:port but keeping original source ip

I have following iptables rules on gateway machine(192.168.0.1). I want to forward port 192.168.0.1:80 to 192.168.0.2:8080. But I need to maintain original source ip so that original server can get ...
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0answers
10 views

configuring 6to4 on ubuntu 15.04

I need to use IPv6 address. So I configured 6to4 tunnel as it described here: http://ipv4.6to4.ru/howto/debian/. But when I try to ping something I get this: $ ping6 ipv6.google.com PING ...