Managing and using network connectivity on a Ubuntu system

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WiFi Internet doesn't work after few mins [duplicate]

I ran lspci | grep -i net, you can see the output below: ~$ lspci | grep -i net 02:00.0 Network controller: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter (rev 01) 03:00.0 Ethernet ...
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Ubuntu 16 server edition 32bit: Can't ping internet, but can ping LAN

Ubuntu 16.04.1 LTS 32bit Server Edition Computer: Intel Pentium 4 /2.4Ghz 32bit WirelessNetwork Card: Realtek Chipset/ TPLINK wireless N PCI adapter I'm new to Linux and Ubuntu. I have been ...
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No internet on Ubuntu 16.04, unless using an access-point on a 14.04 laptop or NAT network (on Virtualbox)

I've been testing Ubuntu 16.04 before upgrading from 14.04 and I found a weird issue with the network connection. If I connect directly to the router, the connection to the internet is very ...
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29 views

I need to properly install my college's lan settings on Ubuntu 16.04

I tried inputting my college's LAN settings. But as a result, internet is only working in Mozilla Firefox and other applications like HexChat are not connecting and also apps from android market are ...
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26 views

How do I enable wake on lan in ubuntu?

I already looked at How do I enable Wake on LAN with Ubuntu? and this does not answer my question. I have a Dell Inspiron 8300. This is what I get for querying the NIC with ethtool: sudo ethtool ...
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How to measure internet traffic usage per month? [duplicate]

I need a way to measure my internet usage per month in order to be able to select the optimal plan from my mobile network operator because I will need to work on the move connected to 4g network ...
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13 views

Establish a DSL connection using “pppoeconf” failed

I want to establish an DSL connection to a new server, which is of OS: Ubuntu 14.04 Desktop. When I want to configure the network connection using "sudo pppoeconf", I got the following message: "...
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34 views

Connection through wireless adapter is lost every few minutes, need to re-connect

Background. Internet through wireless adapter worked fine on 14.04 LTS. Problems started after a fresh install of 16.04 LTS. Installed the driver r8188eu using these instructions. This solved the ...
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Atheros AR9285 won't connect to WPA2

weird issue I've been running into and been researching and kind of come up with zilch. So basically using a cheap netbook I got from Aldi i got a few years ago, I loaded Lubuntu 16.04, which needed a ...
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How to install TP-LINK Archer T4U driver?

I bought the wireless adapter to use with a computer without internet access but I can't figure out how to install it with just a USB with the driver on it. I've read a few articles on how to install ...
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WiFi not working after latest Ubuntu software update

I have a Dell laptop running Ubuntu 14.04 LTS I purchased it new about a month ago. This morning I got a popup about a Software Update available, so I updated, and now the wifi is not working at all. ...
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25 views

must to do modprob -v rtl8188ee every time i start linux

Good afternoon, I'm having a wi-fi problem: my wi-fi signal was poor so I tried to install ndiwrapper to install windows drivers. It did not work so I purged ndiswrapper after uninstall the windows ...
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RTL8187L Wireless Adapter Problem , Internet Doesn't Work on Ubuntu 14.04

I had Ubuntu 14.04 And i have Recently bought ALPHA Wifi (AWUS036H) network Adapter Here's the problem Firstly i don't have a setup file for my ubuntu and i don't know how to install it secondly : ...
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35 views

I can't see Wifi networks. I have realtek wireless card, model: RTL8723BE

I upgraded Ubuntu from 15.04 to 16.04. I have tried reinstalling rtlwifi-new-dkms Wifi problems with rtl8723be in Ubuntu 14.04 Also, I disabled Secure Boot in BIOS, which help reactivating the ...
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24 views

maas fails in deploying a node

I have a physical server with ubunut 14.04 and maas 1.8.2 on it with access to Internet. There is a node connected to maas server through a switch. Common configurations for maas's NICs has been taken ...
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4 views

Apache2 LAN configuration not working

I'm trying to set up a virtualhost in Apache2 on my Ubuntu 14.04 headless server. I would like to view the new sites index page and the default apache index page from the browser on my iPad. The new ...
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32 views

Problem with Coovachilli and Routing

I have network like this: My Net Diagram I wanna deploy captive portal on my private VLANs. The local ip address of Ubuntu server is 192.168.100.1 on eth1 and ip address of L3 switch gateway is ...
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WiFi not working after a recent update [duplicate]

I have an asus laptop and i'm runnning Ubuntu 15.10 alongside Windows 10 . A few days ago an update pop-ed up which required me to restart the system . After i restarted it my wifi was not working (it ...
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Wired connection - recconecting

I'm using Ubuntu 16.04. To the internet I'm connected with adapter RJ45 => USB-C. Sometimes I just lose connection and it automatically reconnects me to the WiFi (if enabled). When I re-plug USB-C it ...
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Node in MAAS FAILED_COMMISSIONING

I am trying to add a node to the maas cluster. Maas controller is able to wake the node and start commissioning. But it fails at the end and shows the error FAILED_COMMISSIONING. Here is the log from /...
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Ubuntu Server DC with Samba server 4.4.5 forwarder question

So I've decided to set up a DC via Samba 4 @ my 16.04 Ubuntu server . Question is - since my domain name is SAME as a hosted website domain name somwhere in the WWW (let's call it askubuntu.com) and ...
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Ethernet not detected

I have Lenovo Ideapad Y700. Even though i have connected my ethernet. In my network menu Wired connections does not appear. Also I have a dual boot.So whenever i switch from ubuntu to windows. even ...
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My wireless (BCM43142) won't work

14.04 was getting along with the wireless card until today and I tried many things to fix it but got myself into a mess where I felt reinstalling completely was the best option. I installed 16.04 ...
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1answer
21 views

One network adapter is responding for all the others

All network traffic to 192.168.1.66 & 192.168.1.53, is going to the enp3s0. The only way to have each adapter independent is to put them on different subnets.(e.g. 192.168.2.20, 192.168.1.20) ...
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24 views

Asking remotely a computer to wake another via WOL [on hold]

I understand Wake-on-LAN cannot work if you're trying to wake a computer from outside the network, however, on a very far observatory, there's this server running on Ubuntu 10.10 shutting off ...
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How to configure GSM modem network type (EDGE/UMTS/Auto/etc) since Ubuntu 16.04?

I use USB Modem (Mobile Broadband) to connect to the internet. Prior to Ubuntu 16.04, there used to be a connection setting where you can set a Network-Type (aka gsm.network-type property) through ...
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10 views

Realtek RTL8188CU network adaptor crashing Network-Manager

This has only ever been a problem for Linux, but not windows which works completely fine. When booting into Ubuntu, and now Linux Mint, everything is fine and my connection strength is more than ...
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How can I fix the error below with Huawei E303 Modem not showing in /dev/tty list?

I get this error when I use this command: dmesg | grep tty [ 0.000000] console [tty0] enabled [ 20.203778] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0 [ 20.203933] usb 1-1: ...
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52 views

Can't connect to a specific wi-fi network

There are two wi-fi networks that I usually connect to, Network_A and Network_B. I can connect to Network_B without any problems. I had been able to connect to Network_A without a problem for over a ...
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9 views

set VPN access to network and hosts in local

I use Ubuntu 14.04 and I have problem with my VPN Network settings. I want to connect to my company by PP2P mode but when I connect by default settings I can connect to local hosts in my company (eg. ...
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1answer
32 views

Route IP range outside of VPN?

So I am somewhat more of a newb when it comes to routing IP ranges. My main problem is that I need to route a couple ranges outside of a VPN that I use. I've run into a few issues with this. I don't ...
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7 views

Wifi keep disconnected after 5-6 seconds of connection

I own a lenovo g570 with wifi adapter "Qualcomm Atheros AR9285 Wireless Network Adapter(PCI-Express)" I installed ubuntu 16.04 on it. It was connected to same wifi- router during installation and ...
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11 views

wvdial invalid dial command

I am using a USB modem on my system running on ubuntu. When at home, I am able to comfortably connect to the internet using wvdial. But, at a certain remote location where the mobile signals are very ...
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Ubuntu 16.04 wifi disconnects after 5 seconds [duplicate]

Just installed Ubuntu 16.04 and cant get to work with my wifi. No issues if i connect to my mobile via wifi hotspot but it throws a strange issue with our office wifi. I start ubuntu, connect to ...
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24 views

16.04 in virtual environment does not detect wifi card

I have win10 - 64bit and installed ubuntu 16.04 under VMware workstation. after power on ubuntu and it does not detect wifi card. im using TP-link Archer T8E_V1 jj@ubuntu:~$lspci -vvnn |grep Network ...
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33 views

Slow connection speed with Qualcomm Atheros QCA6174 in Ubuntu 16.04

I recently decided to dual boot my Acer VN7-571G-771E with Ubuntu 16.04, but I'm having problems with my wireless network. The connection seems to fade in and out: it varies from being comparable to ...
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9 views

Intel wireless 3165 sudden contection losses

My problem: When I'm using wifi the I lost connection nearly every minute. In order to reconnect I should establish connection again (in ubuntu gui preess on wifi icon of my network). Also indicator ...
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19 views

Ubuntu ufw blocking connection from allowed port

I have a strange bug, some of my visitor getting blocked somehow, somewhere. It is very strange. For example, it can connect to our database, but after he is trying to access the webpage, all the ...
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15 views

Issues with laptop wireless

I am having an issue with my wireless. It works, but every time I try to switch networks, it says wireless device not ready. Then I use this command to restart it sudo /etc/init.d/network-manager ...
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46 views

“No network devices available” Ubuntu 14.04 when wireless previously worked

My wireless has been working for 3 months previously when just today the screen flashes and it can no longer detect network devices. Disabling/Reenabling Networking or Restarting neither work. I've ...
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24 views

Debian Server not receiving IP from DHCP [closed]

I have configured a DHCP server on Windows Server 2012 which is connecting to my Debian server on virtualbox. They are connected on same line. I changed eth0 to receive IP address from a DHCP server ...
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12 views

Slow Internet for particular websites in ubuntu 14.04

I am new to ubuntu.I have dell laptop with windows 10 and ubuntu 14.04 installed.The problem is with internet, when I use youtube on windows it plays videos without buffering but when I use ubuntu ...
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27 views

static mapping between ipv6 address and MAC (equivalent to static arp in ipv4) [closed]

I want to define in static mapping between ipv6 address and MAC address.(something similar to static arp in ipv4). (i need to do this because my ubuntu machine is connected by lan to interface that ...
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18 views

System performance impact of huge iptables block lists

Due to non-responsiveness to abuse reports by Chinese network operators I decided to block all of their IPs. Several other countries as well. This website's data is incomplete, but gives an example ...
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Rebooted laptop doesn't connect to network with lid closed and connected to AC

I have several ubuntu 16.04 laptops that I manage remotely via landscape. When I reboot them they do not connect to the network until I open the lid. Some are wifi and some are wired ethernet. All ...
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25 views

Why ping and ssh resolves different Ip?

Honestly I have no idea what happened but ping not connecting to the right ip address so can't login with ssh. Say my server ip address is 136.17.90.160, but when local when ping... (venv) simon@...
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15 views

IP masquerading to share server connection isn't working

I have 2 Ubuntu servers, one has internet another doesn't I've followed manual here - https://help.ubuntu.com/community/Internet/ConnectionSharing Done setup accordingly to Ubuntu Internet Gateway ...
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18 views

Ubuntu 14.04 - need ssh access on Ethernet to execute the commands and wifi access to send data

Ubuntu system has two interfaces - ETh0 & wlan0 ETh0 is conected to local test network through switch wifi is conected to Access point Eth0 got ip 172.18.201.100 wlan0 got ip 172.18.202.87 ...
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Dell Vostro 14-5459 Ubuntu 16.04 Wi-Fi slow when plugged in

I bought my Dell Vostro 14-5459 with Ubuntu 14.04 pre-installed. From the start, Wi-Fi speed is almost non-existent when the laptop is connected to the charger. As soon as I unplug it, the speed ...
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18 views

How to get internet connection iLO 4 1

I've set up anew HP-ilo server with ubuntu os in my organization. After connecting with LAN, I have no internet connection. How to fix this?