Managing and using network connectivity on a Ubuntu system

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nis server doesn't export new users to client machines

After a server migration on a new machine, the new users which are created on the server are able to login in it, but not on client machines (which get user list from the server). For the users ...
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2answers
97 views

Ubuntu 14.04 Server operated as a WIFI-LAN-Router drops packets between LAN and WIFI

I would like beeing able to exchange packets between WIFI and LAN. My Ubuntu 14.04 Server operated as a lan-wifi-router has two physical Ethernet Ports (p4p1 and p5p1) as well as a WIFI Module ...
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1answer
20 views

Ubuntu server detecting electricity outage?

I am in the planning stage for setting up my server and have some doubts. Firstly my network is something like this: One parent PC connected to the internet and 3 other child PCs which are not ...
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37 views

Both named and dnsmasq serving DNS on port 53?

Is this considered normal for Ubuntu 14.04 ? netstat -tulpn shows that both bind9 (named) and dnsmasq serve on port 53: Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address ...
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8 views

HP 3070a helds it's printing

I have a problem with HP 3070. It just holds printing and that's it. And I receive communication errors. After quite some time of searching on the internet, I have found some topic, which I hope can ...
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46 views

Ubuntu 14.04 - Issues connecting to Wifi with Asus USB-AC56

I recently installed the drivers for an Asus USB-AC56 WiFi adapter. I had success connecting using the instructions posted to How do I install an ASUS USB-AC56 WiFi adapter? I have since rebooted and ...
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17 views

How to configure 100Mbps network to laptop in ubuntu 14.04

Recently I have install ubuntu 14.04 in my laptop. at the time of installing I was connected to the my ethernet which is 100Mbps through the switch(Dlink which supports 10/100/1000 Mbps ethernet). ...
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19 views

Multiple internal servers hosted on one domain and one public ip

I'm aware of this question already, but this didn't help me yet and I may not ask more help on comments of other people. Situation 1 public ip and 1 domain, two physical internal servers. ...
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1answer
35 views

How to install WiFi driver?

I have a fairly new Gateway Tower. I couldn't play most games on it in Windows 7 so I suspected a glitch in the OS and installed Ubuntu alongside Windows 7. My WiFi still works on Windows, as that is ...
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34 views

All network connections close when laptop lid is closed 14.04

First of all, I'm not the most proficient beaver when it comes to linux in general but I catch on very fast. I'm using the x86 version of Ubuntu 14.04 LTS. I have a Toshiba Satellite L40-14F laptop, ...
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22 views

WiFi disconnects few seconds after boot in 14.04

So, basically every time I boot into Ubuntu I have to manually unplug my WiFi wireless adapter and plug it after few seconds. After that It works fine. This is info about my wireless adapter: ...
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26 views

Ubuntu 14.04.1 wired not working and frozen screen

I just installed Ubuntu (14.04.1) to my computer for the first time and I have several problems I can not connect to the internet with wired while I was looking to the internet for an answer to ...
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14 views

Samba share not letting me authenticate

I've set up a media server on my local network and I'd like to share a directory with the network. The directory path is /home/htpc/Media. I set up the network share like so. It all seems to be ...
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1answer
67 views

ethernet stopped working on ubuntu 14.04, still works on windows

Everything was working fine on my Ubuntu 14.04 32 bit installation (on a Dell Vostro laptop) yesterday. I shut it down last night and since I powered it up this morning it is no longer handling the ...
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3answers
30 views

Can ubuntu be used to print from school networked printers?

I have looked through some questions but haven't found any direct answers- I am considering a Chromebook because of the cheap price, but not being able to connect to my school's networked printers ...
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26 views

A simple guide to setup a PPTP network between a Windows and an Ubuntu through GUI network manager

I'm trying to setup a VPN connection between my Ubuntu computer and my friends' windows computers for gaming purposes. There are a lot of guides (such as this) that describe how to do it in ubuntu but ...
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2answers
99 views

Wifi not working - Broadcom b4312

And i have tried almost all the solutions to get my wifi work . I have compaq laptop with broadcom b4312 wifi adapter. I have tried installing bcmwl-kernel-source and then b43 drivers. The result for ...
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1answer
26 views

Quad Nics work ONE at a time

Quad nics are not working completely. But there is no error on syslog to trace what's going. lspci | grep Ethernet 05:04.0 Ethernet controller: Digital Equipment Corporation DECchip 21142/43 (rev ...
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1answer
121 views

Wifi has trouble randomly disconnects in ubuntu Lenovo IdeaPad Flex 15

I recently bought a Lenovo IdeaPad Flex 15 Touch Dual Mode 15.6” Notebook Intel Core i7-4500U and my wireless connection keeps disconnecting and the only way to reconnect it is to unplug my network ...
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29 views

Ubuntu Server 14.04: Configuring ConfigServer Security & Firewall for Mediatomb

I am currently have issues with getting Mediatomb to work with CSF on my home network server. I have been able to get the Mediatomb server to work with CSF turned off. My Mediatomb web GUI is set to ...
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1answer
63 views

Cannot connect to internet on wired connection

I just built a computer and freshly installed Ubuntu 14.04 on a new hdd but cannot connect to the internet when plugging in an ethernet cable. My computer doesn't have a wireless adapter so wireless ...
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32 views

ssh connection time out ubunto 14.04

I get connection timeout after ssh hnname So I try the follow: netstat -nltp - I see that there is no process listen on port 22 sudo service ssh restart - I see that there is no process listen on ...
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49 views

Open NAT too Xbox from Android via connection sharing

First I know there are similar questions that get closed as off topic but mine is slightly different. Xbox live complains about strict NAT setting when I use a Android tether and connection sharing ...
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13 views

When sharing network connection, unable to access internet

When I share network connection through Wifi, after while im unable to access internet. From quest and also from host. Reconnection of internet connection in host solve problem for a while (2-15) min. ...
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26 views

cannot ping external addresses

I'm installing Ubuntu 14.0.4, I have edited my /etc/network/interfaces added a route with: up route add -net 10.X.X.X netmask 255.255.255.0 gw 10.X.X.1 my /etc/hosts and then when I open up my ...
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1answer
63 views

Help me with installing modem driver software

I am having Huawei ec 150 Data card. It works well with the default network programs in Ubuntu. My network provider offers 3g speed upto 1gb for two days There after the speed will drops as per the ...
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1answer
59 views

Newbie to Ubuntu today w/Windows 7-64 bit dual boot system

I just downloaded and installed Ubuntu on HD side-by-side W/windows7 64-bit, transitioning to Ubuntu & rid of windows eventually. I know zip about Ubuntu, but all seems fine except for my WiFi ...
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36 views

I am running Ubuntu 14.04 LTS on a sony vaio and I can no longer detect wireless networks, how do I fix this?

I have a Sony Vaio, bought in 2013 so it's a fairly new model. I installed ubuntu 14.04 LTS and I cannot connect to wifi- or even detect any wifi. I've tried to install drivers and even tried a ...
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1answer
28 views

How to find IP address lease info using WPA2 Enterprise

I'm trying to find the DHCP lease info for my wifi connection on a network using WPA2 Enterprise and PEAP. I can do this in Windows using ipconfig /all which shows both when the lease was issued and ...
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1answer
31 views

Can Ping & HTTP but not SMTP from a host

I have an Ubuntu 14 Server host. I can ping and HTTP to an external server, but cannot SMTP to it. Doing host mail.domain.com returns the correct external address, so DNS is working. Doing ping ...
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11 views

network carashes

using ubuntu 12.04 LTS 64bit with a brand new system on a gb network(wired). the ip is set by the machine and connected to a linksys e42000 router. using onboard gb nic card mainly used as a gaming ...
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65 views

LXC container no outgoing traffic with bridged network and public IP address

I try to setup a LXC container with bridged network on ubuntu 14.04.1, but the outgoing traffic seems to be blocked. Ping another IP than the container's one is not working. Actually I tried this with ...
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24 views

Why the programs don't connect to internet except for the browser?

I solved a problem of getting a "DNS resolving failed" in my computer, now I can surf through internet with the browser without problems but programs, such as: dropbox, spotify, mendeley desktop ...
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0answers
31 views

Is it possible to find the host name (Computer name) in my LAN network if I know its IP address? [duplicate]

I want to know whether this can be achieved using terminal. I have tried nmap, nslookup and netstat, and failed.
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91 views

virtualbox - internet not working -Adpater 1 NAT cable not connected

I am running Ubuntu 12.04 in Virtual box hosted on Windows machine. Internet is not working. I tried - making changes in /etc/network/interfaces. - and then sudo service network-manger restart The ...
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20 views

Get top 10 processes by network usage

The past 2 nights, my Ubuntu server had strange jumps in resource usage and everyone connected to it get a "Software caused connection abort" error and can't connect for about 5 min due to being timed ...
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84 views

Ubuntu Server Running Behind ASUS Router Can't Reach Network (dhcp issue?)

Running a Ubuntu server through my home network, and it's also utilizing a dyndns, which I presume (yes, I'm 'tech dumb') is configured on the server. The settings were fine on various routers, until ...
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1answer
24 views

Does deleting the interfaces config file reset ifconfig to default (DHCP)

Okay, so I have a remote Ubuntu Server (14.04). Yesterday, I tried changing some network configs in /etc/network/interfaces ... Yeah ... You get the picture ... Now I can't remote into it. I do ...
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1answer
40 views

Redirecting multiple ports with socat

I would like to use socat to redirect some ports and I found a socat daemon here. However this daemon lacks documentation and I could only setup for one port redirect. Is there any syntax to make ...
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1answer
31 views

Bypassing Network Manager

Assuming there is more than one ethernet NIC as well as a wireless device on a given system, how can I specify custom settings in /etc/network/interface for one of the NICs but allow Network Manager ...
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1answer
13 views

Setting Up Loopback to Function When Ethernet Disconnected

I'm currently running a fresh install of 14.04. "ifconfig -a" lists the loopback address, however I cannot access the loopback interface (i.e., pass packets across it) unless a networking cable is ...
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1answer
20 views

Communicate from Ubuntu 12.04 to Ubuntu 12.04?

I have two laptops running Ubuntu 12.04 on which I want to build a (virtual) network using VMware Workstation. The first step is to communicate between the hosts by using an crossover cable. I have ...
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2answers
53 views

Networking stopped working after reboot

I powered down my headless, no gui file server to replace a seized fan and now the eth0 interface isn't picking up an IP address via DHCP; during boot it just sits there "Waiting for network ...
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11 views

error while resuming the wireless network connection in ubuntu 14.04.1

When I disconnect from a wireless network and try to reconnect, it fails. I do get this error message: Error enabling device GDBus.Error:org.freedesktop.ModemManager1.Error.Core.Failed: Failed to ...
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32 views

Cannot Login and Connect Internet Via Proxy after upgrade from 12.04.05 to 14.04.01

I got two problems after upgrade from 12.04 to 14.01, Cannot connect internet via proxy although I set it in /etc/apt/apt.conf Cannot login into lightdm, it asked password and looping. I change the ...
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24 views

Network disabled, low graphics mode

Having problems with computer and cannot connect to internet. Was working fine yesterday, and when I turned it on today, I am receive a low-graphics mode warning. Going to the terminal and trying to ...
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15 views

Diagnose Wi-Fi password prompt?

It seems that on some Wi-Fi networks I am often disconnected and prompted for the Wi-Fi password. The password is entered in the password box, so all I have to do is push connect. And pushing ...
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1answer
67 views

How to (re)configure my internet connection? (DNS resolving failed)

A couple of days ago I was working with ipython notebook and it opens me a page in my web browser (Google Chrome) and I was able to work with the notebook (zero problems with my internet). Then, I ...
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1answer
40 views

Which application can mount or open the network shared directory?

I am new to Ubuntu and I don't know how to open the Network and which application can open the network locations ? Actually I tried with the following steps on first time I was connected but after ...
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3answers
212 views

Problem accessing Windows Share from Ubuntu using Samba

I'm trying to connect to my Windows Share from Ubuntu, and I can't access it although I can access my Users folder. The share works fine when I'm connecting from a Windows computer, so the problem ...