Managing and using network connectivity on a Ubuntu system

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Ubuntu 12.04.5 LTS unbearably slow after entering passphrase for WiFi

I've installed Ubuntu 12.04.5 LTS on an (quite old) IBM ThinkPad T40. Connecting to the internet using LAN works perfectly fine, but as soon as I "Enable Wireless" in the Network Manager, choose a (...
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3answers
70 views

Ubuntu 16.04 - OpenVPN

I have one question. In my Ubuntu desktop 16.04 when I start one OpenVPN connection I lose internet connection. I think it's due to network I connect have a proxy and I have not configured. Is there ...
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1answer
30 views

OpenVPN in LXC: Failed to set devices.allow

I have been trying to get OpenVPN working in a LXD-managed LXC container on Ubuntu 16.04. I have added the tun device to the container config via lxc config edit container and it is properly created. ...
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16 views

Losing wired network connection once a week

Since upgrading to 16.04, my linux box at work, which runs day and night, loses connection to wired network occasionally, typically once per week. Usually when I am far away and try to connect... ...
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22 views

macchanger on xubuntu 16.04 broken. Fix?

Since the upgrade to 16.04 this command: sudo service network-manager stop && sudo macchanger -r wlan0 && sudo service network-manager start returns: [ERROR] Could not change MAC: ...
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26 views

Where should I report issue related to DNS failure

Recently I've got DNS issues on my Linux box (Xubuntu 16.04) when I open a new webpage it return DNS error (that name can't be found) and after the second the page appear. When I refresh the browser I ...
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0answers
19 views

Creating Hotspot on Ubuntu VM with Windows 10 host

I have a bit of a messy setup that I need to get working. I am using virtualbox on windows 10. This machine is connected through a wired connection. On this windows machine, I also have a usb wifi ...
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0answers
49 views

Problems with tg3 ethernet adapter after 16.04 upgrade

After doing a clean install of 16.04 Server on my HP ProLiant MicroServer Gen8 server I have problems with random disconnects from the network. The server will run fine between a few hours and more ...
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27 views

Ethernet suddenly broke down

I have a laptop (Thinkpad p50s) with fresh 16.04. There was Ok during month, but today ethernet suddendly broke down without any reason. Wi-fi is working. Also I turn off ipv6 but without success My ...
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0answers
20 views

DHCP server isn't responding to DHCPDISCOVER request [closed]

I am using a linux distribution security onion as a virtual machine over windows 7 host via virtual box. This vm is unable to get any ip address from the dhcp server. That problem results from ...
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0answers
23 views

lose internet after pinging laptop from another system

I have connected two laptops through ethernet, call them laptop1 and laptop2. laptop1 has internet(by connecting to wifi) and shares it with laptop2. both have static ip's on ethernet interface....
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39 views

How to solve “cannot get hardware address” error , Ubuntu 16.04 32 bit

I have just installed Ubuntu 16.04. When I try to connect to my ISP server(wired) from my terminal, it's gives a error cannot get hardware address. The error log is- 2016-07-13 06:09:21 [4354] ...
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1answer
34 views

Can I send requests to another PC? [closed]

My situation: I have one internet connection thus one home account. On my LAN there are a few PC's, a console and a server. My provider's router is setup that requests from outside go to my server's ...
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1answer
30 views

Can see Ubuntu server on the network, but cannot connect

I can see my Ubuntu machine on the network, but I can't connect to it. This is the second time this has happened in the last couple of days. Last time, I rebooted the server and changed the network ...
2
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1answer
35 views

How to change naming scheme for network interfaces of an already installed Ubuntu 16.04?

I want to change naming scheme for network interfaces for the classic one (eth0, eth1, etc). Is it possible to an already installed Ubuntu 16.04 machine?
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35 views

Can not connect to mobile broadband even when modem is detected

I am using Ubuntu 14.04 LTS and when I connect the Linktop U100(CDMA2000 1X USB modem) the "New Mobile broadband connection" alongwith "Enable mobile broadband" appears in network drop-down menu but ...
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0answers
17 views

WIFI connected- Internet cuts off

Okay I am new to linux, ive tried 2 wireless cards both work and after some usage they'll just randomly stop working but the computer will still show as connected. I unplug, plug back in and I'll be ...
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0answers
9 views

ODD DNS ping results

Can someone help me understand this: When I ping a host, it resolves and then I start getting icmp responses from another host? $ ping 7-hostA PING 7-hostA.mydomain.com (192.168.2.87) 56(84) bytes ...
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30 views

Share a folder on an external hard drive between two Ubuntu 16.04 machines

As far as linux based systems go, i was born about three weeks ago but by no means am I a computer illiterate. I want to share a folder on an external hard drive physically mounted on an Ubuntu 16.04 ...
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0answers
16 views

Can't switch on Wireless adapter

I have Ubuntu 14.04. I was able to access WiFi and bluetooth until recently. Few days back when I started my system, the WiFi was switched off. I tried to turn it back on. But, could not. Ethernet ...
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0answers
19 views

Cannot ping myself (127.0.0.1) or ping outside or ssh into my ubuntu 12.04 server

My server was working fine a few days ago. I was able to SSH in. Today all of a sudden I can't SSH in, but I'm able to access the console directly in order to troubleshoot the issue. I tried ...
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36 views

wifi - rtl8723ae - ubuntu 14.04 - issue with reconnection

I can't reconnect to some WiFi here are some info that could be useful: sudo lshw -C network -numeric *-network description: Ethernet interface produit: AR8161 Gigabit Ethernet [...
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38 views

Not getting internet connection

When I login, I am not getting an internet connection. Only after running network-manager restart internet connection is established. Any idea why this is happening? My etc/network/interfaces -...
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0answers
49 views

wifi disconnected after reboot, ubuntu 16.04

I installed Ubuntu 16.04 on Lenovo G580 and first time I connected WiFi but after reboot I have got this popup disconnected - you are now offline Network. $ lspci -k | grep Net -A2 02:00.0 Network ...
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1answer
33 views

SSH : Could not resolve hostname 192.168.40.250:2080, Name or service not known

I just installed a centOS 6.5 web server on a VMWare. Now I' like to access it from my physical computer in order to use the LAMP stack i installed on it to host a web application am developping. But ...
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0answers
17 views

Disconnected - you are offline now [duplicate]

I try to connect internet by WiFi, but WiFi connected for some time, net work well for 10 minutes. Then I found disconnected you are offline network when I run lspci -knn | grep Net -A2 I found: ...
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0answers
15 views

Change IP Adress Ubuntu v13 [on hold]

I have a Touch PC running with Ubuntu 13. I have to change the IP Adress of this Computer to: IP: 172.1.0.103 SUBNET: 255.0.0.0 Is there Any Chance i can do that with the Normal Network Change ...
2
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0answers
18 views

How can one dynamically select which network interface to use to make a connection?

I'll start off by explaining my set-up. I have an Ubuntu workstation (14.04) which has two connections to two different switches, on the 10.1.x.x network and 10.2.x.x network respectively (I will ...
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1answer
28 views

Getting “Too many authentication failures” from every ssh server I've been using

About two weeks ago one of the servers at my workplace started giving me this error and then another one. Now even my local server (on my home network) gives me this error too. What does this mean? I ...
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0answers
17 views

Can't find a specific network ubuntu14.04

I know these kinds of questions get asked all the time but I can't seem to find a solution for my problem. I'm trying to connect to a specific network but I can't find it(it doesn't appear in the ...
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0answers
15 views

Brother DCP-145C prints but Can't Scan over Network

I'm using a Brother DCP-145C on Ubuntu. The printer is plugged into a Windows machine via USB. The printer works (after I downloaded the drivers from Brother). The scanner does not. I downloaded and ...
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85 views

wifi frequently disconnects on ubuntu 16.04 and not working in 14.04

I have hp 15-ac110tx and dual booted ubuntu and win 10 in uefi mode with secure boot off. All the things are latest updated and upgraded. But wifi frequently disconnects. The output wget -N -t 5 -...
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33 views

Ethernet connection detected but not connecting to internet

I am using Ubuntu 16.04 LTS . I had completed reformatted and reinstalled Ubuntu 16.04 from scratch . The Ethernet connection is getting Detected as wired connection 1 however it is not connecting to ...
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0answers
102 views

Internet speed decreases suddenly on Ubuntu 16.04

I am using Tata Photon Max Wifi to connect to internet. Since morning download speed is decreasing to 10-15 kbps. Normal speed I receive is usually more than 200 kbps. I have not changed any settings ...
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0answers
20 views

Change vbox network setting from host-only to nat on ubuntu server

I have installed virtual box on ubuntu 16.04 server. I have noticed from vboxmanage showvminfo vmname command that the vm has host-only network. This is how it looks like NIC 1: MAC: ...
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0answers
28 views

Network doesn't work on boot

I've setup my /etc/network/interfaces. But I have to always restart my network, not just start. /etc/init.d/networking restart on the system boot. Where is the problem? I want my network to start ...
0
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1answer
39 views

OpenVPN bridge doesn't work outside LAN

I trying setup OpenVPN server. This is the network: cable modem, TP-Link router with OpenWrt Chaos Calmer 15.05.1 / LuCI 15.05-149-g0d8bbd2 Release (git-15.363.78009-956be55) 192.168.15.1 router 192....
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0answers
25 views

BSNL EVDO 3.1 Mbps Data Card does not connect in ubuntu mate 14.04

I have BSNL EVDO 3.1 Mbps Data Card connected in my HP Pavilion g6-1117tx Notebook PC. I have OS installed ubuntu mate 14.04 and windows 7 (dual booted). When I logged into windows my EVDO card works ...
1
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1answer
70 views

New Ubuntu install and wifi fails, but not on set up

I put a new Ubuntu install on a laptop. During the install I was able to indicate which network connection to use, which it did. Hooked up wirelessly to my router, and even the WiFi on indicator led ...
4
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0answers
96 views

Wireless disconnect issues Ubuntu 16.04 with RTL8821ae

I've been having trouble with my Wifi ever since I installed Ubuntu 16.04 two months ago. There are several posts similar to this one on the forums, however I've not found any that work for me. Here ...
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0answers
27 views

UPnP Port Mapper could not find router

I have downloaded UpNP Port Mapper and I moved it to my desktop and renamed it "portmapper.jar". In the command-line, I changed the directory to my Desktop and then typed service apache2 start, and ...
1
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1answer
45 views

Can't open network settings in Ubuntu 16.04

Edit: Network Settings finally opened and has given me a message saying "The system network services are not compatible with this version". Is this because I updated through Ubuntu Software before I ...
1
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0answers
22 views

Loss of Internet Connection When Assigning Static IP

After updating an old 'sandbox' type 14.04 desktop computer to 16.04 server to use again for mostly the same purpose, I was attempting to give the computer a static IP, and eventually forward a port ...
1
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1answer
21 views

Windows/WINS host names not working even after winbind install on 16.04

In the past, I was able to get Windows host names on the LAN resolving from inside Ubuntu by doing sudo apt-get install winbind and then editing /etc/nsswitch.conf (adding wins to the end of the hosts:...
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0answers
23 views

Ehternet Works on ubuntu 16.04, but Wifi doens't

Ethernet works fine on my newly installed ubunutu but wifi doesn't! I tried reinstalling drivers but didn't work. What could be the problem?
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17 views

Sharing WiFi configuration files over diffferent computers

I have several computers and I would like to be able to share configurations among them: for example, when one of them connects to a new WiFi and I return home, the others can get this new ...
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0answers
13 views

How does MAC Address cloning works in Ubuntu from “Edit Connections”?

I found that cloning MAC Address works very well from "Edit connections" method than changing mac address with "ifconfig" command. sudo ifconfig wlan0 down sudo ifconfig wlan0 hw ether sudo ifconfig ...
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0answers
9 views

use multinational keyboards on android tablet networked to ubuntu pc

I need to create documents using different language keyboards. I want to create documents on an android tablet(4.2,4.4) using different online keyboards(spanish, german, etc), and then transfer the ...
0
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1answer
40 views

How to fix ifconfig eth0

I followed a step from this answer: 1 down vote Your problem is no default route is available as you see (route commanr response). This isobviously because of dhcp failed. So now you can set ...
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1answer
38 views

SSH Authentication Problem

i'm currently trying to setup a few virtualboxes (ubuntu 15.10) to simulat a network i'm developing some software for. For this i need to setup a SSH connection, this is working, but i can login ...