Managing and using network connectivity on a Ubuntu system

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Ubuntu 14.04 Wifi Ubstable

This is Thinkpad X1 Carbon Gen 3. It connects to the wifi on campus perfectly. However, it has problems connecting the router in my apartment. The wifi disconnects every 4-5 minutes -- it still shows ...
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Ubuntu 12.04 server no internet connection

I lost power briefly today, when my headless ubuntu server rebooted I could no longer SSH into it. I assumed the drive had failed or something. I took out the drive, put it into a USB SATA enclosure ...
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!!! REALLY URGENT !!! - Ubuntu uses all upload speed

So a couple days ago I received a complaint that there was really high latency on our network -- fine, easy fix. I open up our firewall to see that it's sending 100,000 packets per second! Our RAM and ...
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Can't connect specific WIFI network (Ubuntu 15.04) - I tried all solutions on the forum, but didn't work -

I'm using Ubuntu 15.04, My computer cannot connect to a specific WIFI network, but it's connecting to this network using an ethernet port. Also when I open my computer with Windows 7, it can connect ...
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Where can i find complete documentation of managing network with only command line? [duplicate]

Where can i find complete documentation of managing network with only command line? Is there any kind of risk ? Note: Last time when i try command line, the graphical network manager create problem, ...
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Ubuntu 14.04 spying? suspicious traffic at boot

Brand spanking new Fresh install of Ubuntu 14.04; After I disabled all the web searches in Unity bar (all that I could find, amazon, various lenses, stupid web searches on a local computer ect.) I ...
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Cannot connect to Internet unless I disable then enable interface (since upgrade to 15.04)

My computer has two network cards: - eth0 has a static IP address and connects to the LAN. It is not managed by NetworkManager. - eth1 has a dynamic address and connects to my cable modem. The ...
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How do I reset network devices in Ubuntu 14.04

I just installed Ubuntu 14.04 Server (without a GUI) running as a virtual machine (Ubuntu host). Everything is fine so far but I changed some settings regarding my networking devices. So now I tried ...
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“Learning” DNS server

I recently used a Raspberry Pi as a router, including services like DNS and DHCP in addition to nat. "dnsmasq" works really fine, resolving the IP addresses stored in /etc/hosts. But it can't ...
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25 views

No Network connection

I have just installed a new Asus 9750 motherboard and installed Ubuntu 15.04. My network says 'ethernet not managed'. I have set the ip address etc., and also added to /etc/network/etc. Windows ...
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VPN Basic setup help

Can anyone tell me a few steps to set-up a simple VPN, to secure my email.I have tried various servers/PPTP none work.The connection keeps getting disconnected.
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Cisco Packet Tracer install file backs up my home directory?

Using the install script for packet tracer from here backs up the data in my home directory for some reason, before the install starts. Does anyone know why? Here's the script - ...
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Slow File Server Reads, But Disk and Connection Are Fast

I recently upgraded my fileserver to 14.04.2 LTS, with a fresh install. I'm having some network issues that weren't present on the old 12.04 LTS install (this is not an upgrade, I installed from ...
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Using Multiple IPs for the same interface for different application?

I want to do some IP aliasing, but I want my browser to use a different IP from the IP for BitTorrent. For example: I want the browser to use this IP for example 192.168.1.45 and BitTorrent to use ...
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15.04 vivid vervet intermittent selective network outages

I recently upgraded from 14.10 to 15.04 and immediately after the upgrade was finished, I began having network problems. At first I thought the errors were related to my squid3 cache, but I have ruled ...
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How to use DSL connection and ethernet Network concurrently

In my university, we use a dial up network for internet. Apart from that we are also connected with Ethernet network. By this we can access shared folders of other friends. But In windows we did it ...
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15.04 can't connect to WiFi when not password protected, but has login page

This has happened more than once with me, so I decided to ask. If the WiFi network is password protected my laptop connects fine. If the WiFi is completely open it connects fine as well. The problem ...
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Mozilla NSS building

In this instruction :"In order to start the build process, use "cd nss" and execute "make nss_build_all". By default this will produce a build in debug mode and for a 32-bit architecture. You may set ...
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Ubuntu 14.04 OpenVPN no internet

Hi I have an OpenVPN server on my VPS machine. I can successfully connect to my VPN but I have not internet connection. openvpn.log: Sat May 2 12:25:23 2015 OpenVPN 2.3.2 i686-pc-linux-gnu [SSL ...
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Disappeared Wifi interface after turning on Monitor Mode?

I have just got an used computer from my friend today. Beforehand he turned on the monitor mode of the Wifi Interface in Kali but then forgot about it. I have just installed Ubuntu but I cannot find ...
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Can't connect to wireless, broadcom doesn't work

I have broadcom drivers but it doesn't work, when I hit apply change noething happens. I have only WIFI and can't connect to networks. Output of: lspci -vnn | grep Network : Network controlles ...
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wireshark crushes when using flow graph feature ubuntu 14.04

Using the flow graph feature on wireshark Version 1.10.6 causes wireshark to crush. Iam running wireshark on ubuntu 14.04,
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Ubuntu Port Scan , Security concerns

Scan results of my ubuntu 14.04 $ nmap 127.0.0.1 Starting Nmap 6.40 ( http://nmap.org ) at 2015-05-02 08:43 IST Nmap scan report for localhost (127.0.0.1) Host is up (0.0021s latency). Not shown: ...
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LAN problems accessing Ubuntu 10.04 LTS [on hold]

"Firefox can't access the server ..." on Ubuntu 10.04 LTS with ASUS P7H55-M. Ping also. (LAN, line, rights are OK) I found the solution: http://askubuntu.com/a/146669/48364
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No WiFi after upgrade to 15.04

After upgrading to 15.04, wifi doesn't enable an internet connection. The interface connects to the router,however. I saw a similar question, where the solution was to delete two iwlwifi files - tried ...
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How can I block one or more websites from the command line, especially for Google Chrome?

I teach in a school and have a cart of laptops that I set up with Edubuntu 12.04. I am using LanSchool to monitor their screens, remotely control them, blank their screens, etc. The functionality is ...
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No wireless networks listed since upgrade from Ubuntu 14.10 to 15.04

PVC is a Dell 1545. dual booting Windows 7 & Ubuntu. I upgraded from 14.04 to 14.10 yesterday morning, all worked ok including wireless connection. Then a few hours later upgraded from 14.10 to ...
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How to setup LBaaS with Openstack and Juju?

We have our Openstack deployed via Landscape and Juju and are trying to setup Load Balancer as a Service within the cloud. We have found that we need to configure openstack-dashboard to show the ...
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Restore Network Manager to Global Menu Bar?

Just upgraded to Ubuntu 15.04 and now I no longer have the option to manage he network from my global menu bar. I need this o connect to my VPNs. Any thoughts on how to restore this? Thanks
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1answer
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How do I add an additional IPv6 address to /etc/network/interfaces?

this question How do I add an additional IP address to /etc/network/interfaces? mostly asks what i want except that i want to add more IPv6 addresses in the same interface eth0 without incrementing to ...
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WiFi connected but won't load

I've had Ubuntu 14 installed for the past 3 - 4 months & its been pretty good but in the past week or so I keep getting WiFi problems. The WiFi just stops working every few minutes but shows that ...
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cat: /var/lib/misc/dnsmasq.leases: No such file or directory

I've searched all over the internet, but couldn't find any answers of my problem.. I want to connect my Raspberry Pi to my laptop. But whenever i try to check the ip address of my raspberry, i get ...
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LAN with Android device w/o sharing internet connection

I've been searching a solution to my problem that might be simple but I couldn't so here's my problem: I have an Ubuntu running PC with a web server. I'd like to access this web server through my ...
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41 views

Wireless power management turns back on in 15.04

I have turned off power management for my wireless. I did that in /etc/pm/power.d/wireless. When I try to connect to a network, the power management turns back on. So the connection fails. I try: ...
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Is it possible to ruduce background network use when on mobile wifi hotspot

Short version: What is the easiest way to temporarily reduce the amount of background network traffic to a minimum? Long Version: I'm connecting to a mobile wi-fi hotspot hosted by my cell phone, If ...
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How do I setup a tunnel piercing scenario on my Ubuntu client to access the internet through my own server including port knocking on it?

Google isn't my friend with this long term issue which is up to date for my upcoming holidays again. It would be great if you could provide a road warrior setup for DNS as well as IP tunneling as a ...
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How to connect to network drive when I'm not home

I have bought a 3 TB WD MyCloud network drive and successfully connected to it through Nautilus using Connect to Server and then smb:// followed by the IP address. I then bookmarked the different ...
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How do I give a VM exclusive access to a Network Interface? pfSense QEMU

Trying to setup a pfSense VM to have exclusive access to 'em2' on my 14.04 machine so that I can use that as a WAN port. I don't want anything other than the pfSense VM to talk on that network ...
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ufw port accessible locally but not remotely

I am trying to access an application on my server I have running on port 8000. From the server I can access the application via curl mydomainname.com:8000 from any other machine I just get curl: (7) ...
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How to I connect to WIFI when installing Ubuntu

I am installing Ubuntu - I am quite new to this. After I choose language I keep getting not connected to network. How do I connect to WiFi? I don't have a wired connection - it is a notebook with ...
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Wifi not working in Ubuntu 14.04.2 LTS

Here's what rkfill list returns 0: ideapad_wlan: Wireless LAN Soft blocked: no Hard blocked: no 1: ideapad_bluetooth: Bluetooth Soft blocked: no Hard blocked: no ...
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1answer
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ifdown in cron bash script fails to run

I have a script that is run when a server (Ubuntu 14.04) boots up using @reboot in crontab (Under the root user) @reboot /bin/bash /root/init.sh >> /var/logs/vminit.log The script runs a ...
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In terms of privacy and security, is there any benefit to using a remote VPN service? [on hold]

I have a Synology NAS, and it has the option to run openvpn, so why would I pay $10-20 a month for a service like TorGuard who will do exactly the same thing? Or I could just install openVPN on my ...
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Network security at home [on hold]

tomorrow i will move to an apartment with other students, we will all share the same network and i am concerned because i don't know if they know how to access my pc through lan. What can i do to ...
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LAN is not working, Showing “Cable Unplugged”

I am using Lenovo B490 laptop and everything was fine. Few days back My friend used my laptop in my absence and after that I am not able to connect internet through the LAN port. It is showing that ...
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Can't connect to some wireless networks using a rtl8188ee wireless adapter

I have a problem connecting to some networks on Ubuntu MATE 15.04 with my Toshiba c55 laptop which has the rtl8188ee wireless adapter. I can connect to my home network without a problem, but I can't ...
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87 views

Wireless issues on new 15.04 install

I have recently installed Ubuntu 15.04 after having been forced to use windows for about a year. Unfortunately my laptop is having some pretty severe wifi issues since the switch. I suspect it is a ...
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1answer
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Wi-fi speed dramatically low on Ubuntu vs Windows

I have just installed Ubuntu 14.04 on my machine. My kernel version is: 3.16.0-34-generic My problem is that download speed in Ubuntu (measured via speedtest.net is 0.78 Mbps while on Windows ...
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Mobile Broad Band connection Problem

I recently Bought Huawei E303F Data card It is working nice in windows 8.1 but in ubuntu connection cant be established using it Modem is recognised but when i tried to connect it is is failing to ...
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Public IP accessible on own subnet but not accessible online (from other subnets) Crazy

My test server which has a public ip 197.254.11x.xxx is not accessible online, though it's accessible on its current subnet /29. (I got several public ip's on one subnet). This subnet connects to the ...