Managing and using network connectivity on a Ubuntu system

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Unique problem with wifi being 5-10 times worse than it should be

I have been using my laptop with Mint for over a year now and have had no issues. I wanted a change of pace and decided to put Ubuntu 16.04 LTS on it. There were no issues with installation. My ...
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7 views

DHCP request timing out, suddenly

On a work computer. No problems with connectivity until now. I was working diligently, when suddenly my computer seized up. I thought it was a graphics issue and rebooted. When I couldn't log in (but ...
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30 views

MacBookPro11,3 wifi issue with Ubuntu 16.04

Good Day All, I have been having issues getting wifi to work in Ubuntu 16.04 on my MacBookPro11,3. Installation of the Broadcom drivers found here leads to dependency issues. If anyone has any ...
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9 views

ThinkPad T450s Wireless interface not detected when installing Ubuntu 16.04 mini.iso

I'm trying to install Ubuntu Mate minimal installation using the Ubuntu 16.04 mini.iso on my ThinkPad T450s. I was able to do so on my T60, but I'm running into network config issues on this machine. ...
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2answers
99 views

Problem with DNS in the latest Kubuntu 16.04 update

Today I install Kubuntu 16.04, again, because I'm having trouble to navigate. I have tried all kinds of browser, and with all I have the same problem. Sometime when I open a page, I received these ...
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9 views

Setup Apache2 on Ubuntu 16.04

First of all, I'm a newbie to Ubuntu.I want to setup my own web server.I already installed LAMP using this command: sudo apt-get install lamp-server^ So what i expect now is when people from ...
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1answer
33 views

Local network works but not the internet

I am at work and the Internet works fine on my laptop but then it suddenly stopped working and still does not work. I can get Local Net. No idea why this issue has happened. I do recall an update that ...
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10 views

WiFi can not connect when laptop is a bit far from router ubuntu 14.04 LTS

so i installed Ubuntu 14.04 LTS a while ago,every thing seems to be working perfectly except for the wifi,when i login to windows 10 the wifi connects instantly but when i log in to Ubuntu the wifi ...
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92 views

Networking Drivers “disappear” Ubuntu 16.04 LTS

About four days ago after installing routine Ubuntu updates, my wireless networking (and I believe networking in general) does not initiate on boot. It takes on average 6 reboots before networking ...
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39 views

NetworkManager can't connect to 5G

So I was trying to optimize my own connection, when I restarted the networkmanager service. Then I suddenly couldn't connect to a specific 5G connection which is quite annoying. When I try to do it, ...
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55 views

TL-WN725N driver Ubuntu disconnect problem

I can't get my TL-WN725N WiFi USB adapter to work on Ubuntu. I tried every solution I found on internet and they didn't work. Description of the problem and my system is bellow. Problem: WiFi ...
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1answer
10 views

Ssh to target host via gateway

Have a HostA that located in internal subnet which could be seen only from gatway host. Then I issue command like: %ssh -t -o ProxyCommand='ssh GateWayUser@GatWayHost nc HostA 22' HostAUser@HostA ls -...
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Internet Is Connected But Not Working On Lenovo g580

Today I Will Install BackBox 4.6 from https://backbox.org/ When I Connect LAN (Ethernet) Cable In My Laptop Still It Is Connected. But I Can't Able To Access The Internet. I Try " ping " Command ...
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1answer
23 views

Setup a static IP allocated to dedicated server

So, I bought a new IP for my dedicated server from a reseller of Psychz Networks. This is the only information they gave me: IP: 104.206.231.109 Gateway: 104.206.231.1 Netmask: 255.255.255.128 So, ...
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1answer
14 views

Forwarding VPN clients to internet

I have following configuration. OpenVPN server on a cloud(Ubuntu 14.04) with static IP( example 50.60.70.80 on eth0). Linux and Windows clients are successfully connected to VPN (VPN static IP's - ...
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4 views

Predict network interface names before upgrading to 16.04

When I upgraded one of my servers I had to adjust network configuration (I use interfaces file) and use the new network interface name. I was lucky that the server runs in a VM and I could access it ...
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25 views

Wireless connection is not showing in Ubuntu 16.04 [duplicate]

Hello I am a newbie to linux.I thought to give a start a with Ubuntu so yesterday I switched to ubuntu but after installing wireless connection doesn't show up but wired connection is working fine. I ...
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11 views

VPN connection issue

I am having trouble with VPN connection can not connect to the workplace, receiving error message VPN connection failed this is what i see in terminal:
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22 views

Wireless LAN Hard blocked: yes

It has been more than a year my old friend Toshiba Satellite A500 cannot connect to WiFi. Long before WiFi was working both on dual boot, Ubuntu 15.04 and Windows 7 but something happened one day and ...
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vmware nat network setting

The below image is what I am thinking about vmware's nat network. The blue line is bridged network, and red circle is NATed network where VMs live. The NAT gateway is 172.16.108.2 The green line is ...
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23 views

Netgear wnda3100v2 [on hold]

How can i make a netgear wnda3100V2 work on ubuntu 14.04 i've been trying for a few hours now and can't get it to connect
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Losing connection to network about once a day. Can't figure out why. [Ubuntu 16.04]

If someone could help me troubleshoot this, I'd appreciate it! The latest in a long series of disconnections came about 15 minutes ago @ 03:00. I've set up a little bash script on my laptop that ...
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9 views

Wired Ethernet on Mac Mini with ubuntu 16.04

I installed 16.04 as a double boot on my 2011 Mac Mini and all seemed to work - until I tried to connect to my network (wired and wireless). I get the message that the connection is established after ...
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2answers
6k views

Correct way to create VLAN and bridges on Ubuntu 14.04?

All, When I tried to create VLANs and Bridges on Ubuntu 14.04 as following, network connection is always lost on it, what's the problem? Note that the if I only set em1(no em1.100, cloudbr0 and ...
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7 views

How to keep VPN connection alive after ssh disconnects

I'm trying to download a large file on my vps which needs to be done using vpn. I use screen to keep wget process running after I close ssh connection to server, but the vpn connection will be lost as ...
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15 views

Unstable internet connection

I have the Intel 7260 (rev 73) and I am running xubuntu 16.04 Sometimes my wifi stops working out of nowhere ("Device not ready" it says in the xfce wifi applet). I need to reboot my laptop to ...
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2answers
14k views

Wireless not working when using UBUNTU 13.04 on DELL Precision M6300

I installed UBUNTU 13.04 dual boot with Windows 8. all working perfectly well except my wireless. the wireless does not turn on or off. neither it detects any wireless system. Fn+F2 does not turn on ...
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1answer
20 views

Wireless Driver (QCA6174) Not Working after Update [on hold]

I sheepishly clicked the "Ubuntu Has Updates" box, and upon restarting my computer, wireless doesn't seem to be working anymore. I have a Killer Wireless 1535 Card that was running just fine on ...
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1answer
22 views

motherboard pcie slot help [on hold]

How can ubuntu tell me what pcie slot I have on my motherboard?
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5answers
85k views

How to set static IP address?

I have configured network adapter of guest Ubuntu to work in a bridged mode so I could ssh to it from the host machine. The problem is that the guest Ubuntu ip address keep changing. Even though ...
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1answer
18 views

SSH: Set timeout for broken pipe

ssh has the paramater -o ConnectTimeout=10 to set the timeout in seconds when establishing the connection, but once the connection has been established, the parameter has no more effect. When an ...
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1answer
26 views

WiFi for HP 17-y020ca under Ubuntu 16.04 always either disabled or “not ready”

I recently purchased an HP Notebook 17-y020ca and installed XUbuntu 16.04. This notebook has a Broadcom Corporation BCM43142 wireless card. This wireless card was not originally detected (but the ...
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Upgraded from Ubuntu 15.10 to 16.04 and networking not working

I just upgraded from 15.10 to 16.04 on a HP Stream Notebook with very little configuration changes from the default installation. Wifi was working before and Ethernet was working before the upgrade (...
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2answers
5k views

DHCP server won't start. Gives 'Not configured to listen on any interfaces!' even when configured

I have just setup isc-dhcp on my server. I even setup the correct interface. But still the dhcp server won't boot. Its says Not configured to listen on any interfaces! in the syslog. And when I try ...
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12 views

Network is unreachable after KernelBuild in Parallels Desktop Ubuntu

I'm a linux newbie and sorry for my bad English and lack of Linux background knowledge. Recently I've been working on Linux KernelBuild on my Parallels Desktop Ubuntu environment (Ubuntu 15.10) ...
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30 views

nmap scan on Ubuntu results in odd result

1. I ran an nmap scan on my system and this was the out put. hobbit@hobbit-OptiPlex-GX520:~$ nmap -v sU sT 127.0.0.1 Starting Nmap 7.01 ( https://nmap.org ) at 2016-06-25 20:08 IST Initiating Ping ...
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No wifi after restart in Ubuntu 16.04

After upgrading to 16.04, there is no wifi whenever I restart the system. My Wireless interface of Ubuntu is RT3290 Wireless 802.11n 1T/1R PCIe on iwconfig I got the following lo no ...
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3k views

After modifying /etc/hosts which service is needed to be restarted in ubuntu

After modifying "/etc/hosts" which service is needed to be restarted in ubuntu !
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2answers
2k views

WWAN-modem disabeling by itself, Ubuntu 14.10, Lenovo T440s, Sierra Wireless EM7345 4G LTE

I have had my Lenovo for quite some time now, and tried looking arround for solutions to my problem with the WWAN. I can enable the WWAN both through the GUI and the terminal, and connect via my ...
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4answers
15k views

How to enable Wireshark without running as root in Trusty 14.04

I installed Wireshark. Running as root is not recommended, so I Did sudo dpkg-reconfigure wireshark-common According to: http://wiki.wireshark.org/CaptureSetup/CapturePrivileges http://anonscm....
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43 views

Lan is not detecting after installing ubuntu 15.10

I have installed ubuntu 15.10 recently. When I connect my LAN cable, it doesn't get detected. My WiFi is working properly but wired connection is not working.
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3answers
4k views

Enable mobile broadband not working

I'm using an EVDO usb Modem on 12.04. It works perfectly fine for few times. But now on wards when ever I try to connect it shows not enabled in status . I tried to enable it by ticking "Enable Mobile ...
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18 views

Unable to “Enable WiFi” on an HP Aspire XUbuntu 16.04

I recently purchased an HP Notebook 17-y020ca and installed Ubuntu 16.04. Having overcome some WiFi driver issues, I am now stuck in the final step of enabling the WiFi. This notebook has a Broadcom ...
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1answer
17 views

Remotely log into multiple computers and run a python script

I am currently trying to set up network rendering with Blender using computers on different networks. I made a script that launches blender and connects to the host's computer. My problem is that I ...
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10 views

Can't change ip range pool OpenVPN Server

i'am new linux user. i have configure openvpn server, but i still don't know how to change ip range pool for client (by default 10.8.0.0)? i want to use 172.30.1.254 as my openvpn server and give 172....
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1answer
5k views

Unable to get wireless internet Qualcomm Atheros QCA6174 802.11ac

I've been looking around for hours to find a driver or a solution to get my wifi working on my new laptop (Acer Aspire V 17 nitro). But without success. I have a fresh Ubuntu 14.04 Installed, This ...
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1answer
307 views

Driver for Wireless 7260

I just installed Ubuntu 16.04 on a laptop with Intel Wireless 7260, but the kernel does not recognize wifi. The laptop does not have ethernet, and wifi is my only way to connect to the internet. As I ...
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0answers
24 views

Ubuntu as Router / Bridge problems

I wanted to operate an Ubuntu16.04 as a Gateway for incoming VPN via fastd/batman and outgoing traffic to be redirected over an airvpn-tunnel (and later some more complex routing settings involving ...
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18 views

Lease on wlan0 renews every 15 seconds

Wireless performance is poor--a recent development. The following output repeats every 15 seconds in the syslog file: Jun 25 10:41:00 Bullwinkle dhclient: PRC: Renewing lease on wlan0. Jun 25 10:41:...
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Ubuntu networking not working after driver reset

Sometimes my desktop will be unable to reconnect to wifi after losing my connection. I am using Ubuntu 14.04LTS. I have found I can recreate this problem by running sudo modprobe -r rtl8187 &&...