Managing and using network connectivity on a Ubuntu system

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How to manage network in packet and out packet?

Looking for solution for Ubuntu system, I had a Computer with 2 different internet connection and 2 IP address. One is static Ip address where second is dyanamic Ip address. Want to receive request ...
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1answer
53 views

Can I restore a backup on a different computer than it was made?

I am using the default backup software for Ubuntu 14.04(deja dup). It backs up weekly to a network location. I'm about to put a new hard drive in my laptop, and I would rather just install ubuntu and ...
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32 views

How to route inbound traffic on one interface to another interface in the same machine?

I have searched the forums, but can't find a solution that addresses my use-case exactly. I need to do this on a remote machine and so don't have a lot of latitude to get this wrong (and possibly lock ...
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1answer
48 views

wired network drops after few minutes / seconds

Recently I installed ubuntu 14.04 on my new laptop, lenovo L440. will doing the installation I used wifi. With a wifi everything works perfectly, the problem is when i plugged a lan cable. The OS ...
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32 views

Wired && Wireless not working, Fresh Install

I have just installed Ubuntu 14.04 onto my desktop. It has been unable to establish a connection to the network, it wont even connect. If I give it a manual IP address, then it says that it has ...
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72 views

Unable to use Internet (hosts unknown) after upgrade from 12.04 to 14.04 - DNS Resolv.conf problem

I upgraded my PC two days ago from 12.04 (desktop) to 14.04 (desktop). Since then, I am unable to surf on the internet. More exactly, I have the connection (wired) but not host resolving. I have ...
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1answer
85 views

How long is an ARP entry cached for?

Where can I find out how long ARP table entries are cached? I'm running 13.10. Can I get this on the command line?
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43 views

Wifi and ethernet networking stopped working in ubuntu 14.04

I have a System76 Kudu Professional version kudp1, it came with ubuntu 13.10 but I upgraded it to 14.04. After the last upgrade I did it stopped detecting ethernet and wifi networks. nm-tool output: ...
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1answer
15 views

Changing Order of Interfaces

Hoping someone can help me, what I'm wanting to do is change the order of my interfaces on Ubuntu 12.04LTS. We're running our Ubuntu server on a VMWare box with three virtual interfaces. I've read ...
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2answers
75 views

openstack: conifgure vm with static ip on eth1

I'm trying to create two trusty VMs with static IPs for eth1, but pings between the static addresses fail. Via havana dashboard, I created a network with a 10.16.1/24 subnet, disabled gateway, ...
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1answer
66 views

Ubuntu 14.04 Disable automatic network connection until after login

So I recently connected to my university's network for the first time using Ubuntu. After configuring it to correctly work with PEAP, it will now prompt me to login using my credentials on the login ...
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29 views

can't connect to the internet wlan and lan not working

I have installed a fresh copy of Ubuntu on Toshiba C655D-s5300 and couldn't get connected to internet. I have tried to follow the same direction with the previously asked questions of installing a ...
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95 views

No Network device available on Ubuntu 14.04

All of a sudden after an update the Wireless icon shows no device detected, I was using WiFi at the time. So far have not been able to connect to any network. My network device info is: Product: ...
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22 views

Ubuntu 14.04 KVM guest issue with static IP address

I Have installed a KVM server and host in Ubuntu both with release 14.04. I did configured the server according to the wiki and it is working as expected. The issue I am having is that after ...
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1answer
98 views

Wifi not working in ubuntu 14.04 all of a sudden

My wifi is not detecting any wifi connections although they are present. As soon as I start my system Network Disconnected notification shows up. But it happens to work sometime and it is quiet ...
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1answer
144 views

Realtek RTL8723be Wifi and Bluetooth 14.04

I just installed the OS on my laptop and at first wifi didn't work. After connecting to ethernet and updating everything, the wifi is working. But it disconnects here and there and requires me to ...
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1answer
60 views

14.04 Desktop: Static IP is acquired, ping works, DNS does not

My question is very similar to this one: Can ping but no DNS I have setup a static IP on my previous Ubuntu versions - 9.04 and 12.04 - without issue. I have used an identical means this time as ...
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1answer
153 views

Using Ubuntu 14.04 as router with iptables, clients can't go online. Probably DNS issue, iptables setting needed

CORRECTION 3: SOLVED! I needed to add the the official DNS server of my departement's VLAN as DNS to the clients. I've read through a large number of posts about iptables issues when using Linux as ...
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40 views

Installing Samsung network printer on Ubuntu 14.04

I am trying to install Samsung C410W printer on Ubuntu 14.04, however after 2 days of struggling any success. I tried to install it through "Add printer", through adding printer in CUPS and I tried ...
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1answer
56 views

Where does `resolvconf` gets the IPs of DNS servers from?

On a server machine, I have the /etc/network/interfaces file similar to: # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet ...
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2answers
113 views

What do LISTEN and ports mean in netstat? [closed]

I have been monitoring my system lately and I have found some strange things are running on my system. Can anyone please explain what they are and why same program use several processes? Output of ...
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1answer
117 views

No internet via wifi/ethernet after 14.04 upgrade

I have just updated to Ubuntu 14.04 LTS on my laptop, and I seem to be having some internet problems. I have no internet connection through wifi or Ethernet, after both working in the previous ...
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1answer
20 views

network bridge not forwarding traffic from span port on router

I want to run several security network tools in LXC containers like ntopng, suricata, snort, etc. I hooked one of my server's NIC's up to a port that is spanned to my firewall... so basically this ...
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where is network layer protocols

that's all I can find tcp source code on my Ubuntu, also the place of data link layer is on the network interface. So where is network layer protocols on ubuntu ? Also I am looking for routing table ...
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32 views

Belkin N300 Router SSID not recognised/listed

I am using Belkin wireless N300 Router, Model noF9K100v1 router. I have dual boot Windows 7 and Ubuntu 12.04. PPTP is configured internally in the router. On Windows and Android, I can connect and ...
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1answer
105 views

I cant access Ubuntu from Windows 7

I read and followed easy install instructions for sharing files with Ubuntu. I have three computers, Windows 7 64-bit home premium, Windows Vista and Ubuntu 14.04 LTS. My problem is that I cant ...
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1answer
116 views

Wake On Lan not working

I have been trying to get Wake On Lan to work on my Ubuntu server (14.04.1 LTS), which I have configured as a home NAS box. I have followed several tutorials to try to get this working, but for some ...
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27 views

I can not print on Windows 7 shared printer

For a while I can not print from my Ubuntu 12.04 64 bit pc on a Windows 7 shared printer. Before that everything was ok. The printer is HP LaserJet 1100. The error message is: "File ...
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Network is not starting in Kubuntu 14.04

In Windows XP Pc I installed Kubuntu 14.04 with dual booting. As network did not start due to IPV6 i changed /etc/network/interface file with IPV4 static addres and gw. Then after it did not start. On ...
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16 views

Use Ubuntu as internet gateway

I do have the following setup and would like my ubuntu pc to work as the gateway to the internet: Access point: 192.168.2.1 Ubuntu (wlan0): 192.168.2.2 Various other clients: 192.168.2.x Now, ...
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102 views

Unable to connect to internet on hyper v Ubuntu 14.04

I have set up Ubuntu 14.04 on hyper-v in Windows 8.1. I also have an external network switch linked to Ethernet. The internet and LAN works fine on my host windows 8.1 PC. But I am not able to use ...
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2answers
22 views

How to get Linksys WUSB54Gv2 working with Ubuntu 12.04.5 (32-bit)

The older Dell tower (Dell Dimension 4600) that i'm using doesn't have Wi-Fi built in (duh) and Ubuntu will not accept my network adapter. I have another computer to download files to and use to ...
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1answer
223 views

Unable to NFS mount from Ubuntu 14.04.1 LTS against QNAP NAS

Note, this is a cross posting question in the QNAP NAS community here: http://forum.qnap.com/viewtopic.php?f=35&t=96526&p=427018#p427018 Any comments and suggestions, as well as pointers to ...
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87 views

12.04lts: no network internet

Friends-- Cannot connect reliably to ethernet nor at all to Internet: Symptoms: About 2 weeks ago did an upgrade. Have not been able to connect to ethernet nor Internet. Today, for example, boot up ...
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12 views

digisol mobile broadband not detected by ubuntu12.04

digisol usb mobile broadband not detected by ubuntu 12.04 i am new to ubuntu when connected to usb port green light blinks but network not connected whenever type dmesg in terminal it showing usb ...
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17 views

bind eth0 to the tor network

I have a raspberry and would like to allow eth0 to only go out into the internet through the tor network. So that everything i watch, download etc. cannot other but pass through the tor network. Is ...
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2answers
36 views

Is there a better way to programatically get the networking parameters from Linux OS?

I am writing some scripts which need to programatically get a lot of networking parameters from Linux OS. For example, the names of all network interfaces, ip address, netmask, MAC address. For ...
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38 views

Problems connecting to eduroam wifi - ubuntu touch

I am trying to connect to our university's eduroam wi-fi network with my Nexus 4 running Ubuntu touch (utopic latest build), but can't get past the first stage. I wonder if anyone can help please? I ...
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2answers
56 views

How do I know my MAC address? [duplicate]

how to check mac address of our system through terminal in ubuntu 10.04LTS ipconfig/all
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1answer
38 views

Unable to connect Internet to Xubuntu 14.04 with wired connection

Just installed Xubuntu 14.04 from usb, installed okay except that I cannot connect to internet. I'm connected via a Solwise Homeplug (Ethernet over wiring). Xubuntu says I have 'Wired connection 1' ...
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1answer
124 views

Getting URL of YouTube video with `youtube-dl` is slow, without downloading video

I want to get the URL using youtube-dl, and the "simulate" option -g that does not download the video. So I gave the following command: youtube-dl -g https://www.youtube.com/watch?v=k4JGSAmu4lg ...
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69 views

Huawei E3276 LTE uplink slow in the routing Ubuntu, but not with other devices in the LAN

I have a Huawei E3276 LTE dongle (12d1:14fe -> 12d1:1506) and a problem with the upstream speed. The problem is not only present with Ubuntu 14.04 LTS (64 bit workstation, kernel 3.16), but also with ...
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2answers
72 views

Ubuntu 12.04 + Wifi not working

i'm having problems connecting over wireless. At the moment, I'm using wicd. It seems to get stuck on "Verifying AP association...". Without wicd I can get the connection up and ping the Net - but ...
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31 views

How to share internet connection and making the client accessible over the lan

I've a Pc with Ubuntu 14.04 connected to a linkys router through wlan0, and I'd like to share internet connection to an AVR with ethernet port. This is pretty simple if only internet connection is ...
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26 views

LAN or workgroup with Ubuntu server and windows clients

I have 35 Windows 7 standalone computers right now and planning to setup a LAN/workgroup using Ubuntu as a server if it's a LAN. Purpose for network: Files from client computers to be accessed by me ...
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53 views

Wifi networks will not show up!

I'm running Ubuntu 14.04 on an old '08 macbook. I've gone to system settings>Software & Updates>Additional Drivers and enabled the wireless driver. But when I click the wifi icon on the top ...
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2answers
47 views

Adding a 'network' USB printer

I have a HP Deskjet 1050a printer, hence the 'network' in the title. Its a bog standard USB home printer. I have it attached to my router (has a USB port in it). I have got it connected and working ...
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28 views

Ubuntu and VirtualBox

I have the following configuration, A host running Windows 7; A guest running Ubuntu 14.04 LTS (VirtualBox); I am connecting a Cisco router directly to my PC running Windows 7 and testing the router ...
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111 views

cannot connect using L2TP IPsec VPN Manager 1.0.9 on Ubuntu Desktop 14.04

used Synaptic to install L2TP have checked the dependencies are installed too. but cannot connect to work VPN when i click connect Ubuntu reports error 410 $> sudo ipsec verify Checking your system ...
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39 views

My IP Address in Ubuntu doesn't work anymore, why?

I have my IP address first (192.168.0.144) but when I tried to ifconfig again the result is this: lo Link encap:Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ...