Managing and using network connectivity on a Ubuntu system

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Network Manager doesn't have option of enable mobile broadband after upgrading 14.04 to latest linux image

Earlier mobile broadband connection seems to work flawlessly but after Upgrading trusty tahr 14.04.1 to linux image 3.13.0-35 there seems to be problem. First it started popping for USB modem ...
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Comparison of wget & recv calls

wget call to download a particular content is much faster than recv system call. Say, with wget the speed is 10 MBits/sec and for the same content with same network conditions, with the recv call the ...
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1answer
9 views

Catch Network Connection Events

I want to run a script when i connect to a hotspot which have a login page that runs on first connection. I use that script in order to login automatically without my attempt. I couldn't find which ...
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23 views

It always says No connections are available

I got this problem a week ago when I open my laptop it says theres no connections available but there is I can connect to my phone with no problems the Broadcom 802.11g adapter sometimes missing then ...
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15 views

How only allow access to only host from guest in virtualbox

I am in such situation that where I am having virtualbox on Ubuntu and two VMs VM1 windows and VM2 linux. Both VMs are added in NatNetwork with name NatNetPrivate with subnet 192.168.15.0/24 so that ...
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13 views

Activating the wi-fi on a laptop using a Wi-Fi

I have a Wi-fi stick,I installed the its drive , but I can't activate the Wi-fi when I run lsusb I get this : engine@Engine:~$ lsusb Bus 002 Device 004: ID 0489:e00d Foxconn / Hon Hai Broadcom ...
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26 views

which DNS is answering to “www”

Today, by mistake, I run this command ping www on a virtual machine running a guest Ubuntu 14.04 under Windows 7 host. The ping response is one of my server outside the network where I work, let's ...
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How do I find number of NICs in my system?

While trying to find number of NIC in my laptop, I found this Superuser question on finding the total number of NIC's and ports attached on physical device. I got some commands to try on system : ...
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27 views

Wired Ethernet issue on Ubuntu 14.04: Link detected, but no internet

I can't manage to connect to the internet, while the Link is working. I'm living in a dorm and I'm currently connected to a Hotspot of a neighbor. Lenovo ThinkPad x230i running Ubuntu 14.04 I used ...
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19 views

Trouble connecting to inernet

I can't ping to anything outside of my local network and I think it has to do with my connection not getting a global scope, the ifconfig command returns this: eth0 Link encap:Ethernet HWaddr ...
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22 views

Trying to access webpages and such results in endless waiting for “connecting to host”

When I try to open a webpage like google.com, the tab shows the status as connecting... and does so indefinitely, ie no error codes or pages are displayed. When I tried to use sudo apt-get update ...
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25 views

Ubuntu 14.04 Slow/unstable wifi

I have a lenovo Y-50 gaming laptop and after first boot I installed Ubuntu and avoided Windows 8 overall, anyways my internet is really slow and unstable even though the router is in the next room. ...
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26 views

Not able to discover all avilable wifi networks in ubuntu 14.04 & weak signal strength

I am able to see only a single network, which is showing a very weak signal strength and I'm not able to connect to that too. Please find details below. ~$ cat /etc/*release* | grep -i distrib ...
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How do I select network mode in Reliance 3g USB dongle

After googling on internet, I didn't find drivers for my zte modem. In my area 3G coverage is low and I am unable to change from 3G to 2G network, neither manufacturer provides it's drivers for ...
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4 views

Ubuntu OpenSSH having issues connecting to Cisco router. No such issues with other distro or OSX

Below is the output from ssh -vvv user@host. I've tried this on two separate computers running Ubuntu. It works from Opensuse and OSX, and also my Android phone. Interesting issue. Any suggestions ...
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32 views

Will Editing HOSTS file in Ubuntu Improve my Network Security?

I have recently learnt about 2 different ways of editing the hosts file in Ubuntu for the purpose of blocking webpages and domains tracking my computer (protecting myself from tracking cookies), and I ...
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How to view media on a laptop on the same network, both running Ubuntu 14.04?

Sounds simple and probably is but here we go; I have a laptop and a Desktop PC both with Ubuntu 14.04 on them (The desktop has windows 7 too but I don't think that's relevant?) Anyway, when I click ...
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27 views

Wireless not working at all, thinkpad x240, intel 7260, ubuntu 14.04

I just bought a brand new Lenovo Thinkpad x240. After installing Ubuntu 14.04 everything there is no sign of WiFi. The card is intel 7260. It connects normally through a cable DHCP. after "iwlist ...
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6 views

Internet connection sharing using Airtel 4g LTE USB dongle [duplicate]

I have an Airtel 4g LTE USB modem (HUAWEI dial up) which I am able to successfully use on my Laptop's Ubuntu 14.04 LTS installation. I want to share this connection with other devices wirelessly ...
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1answer
16 views

Static IP Configuration_Ubuntu 14.04

I have a problem setting static IP on my Ubuntu Server 14.04 LTS. My computer has 2 interfaces p2p1 and p1p1. The p2p1 node - primary node - should be visible form the outer world. I use the ...
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8 views

Dell R210 wired network not recognized during Ubuntu 14.04 install

I'm trying to install Ubuntu 14.04 in DELL server R210 and also in R520, and have the same issue, the network interface is not available/recognized during setup. Same servers run perfectly ok Ubuntu ...
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50 views

WI Fi Conected server not found 14.04

help here Im new on this system, i have been using version 12.04 for about a year along with windows XP on a Dell GX 680, i finally decide last week to get rid of windows completely and upgrade to ...
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20 views

Some sites wont load ubuntu 14.04

I'm using a dsl connection with static ip.Some sites are not working on ubuntu but they are working on windows on the same machine with the same connection.They keep on loading.I also noticed that ...
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1answer
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isc-dhcp for Virtual Machines only

I installed Xen 4.3 on Ubuntu Server 14.04 and added the xenbr0 bridge. The host IP is 145.173.136.2. The network administrator reserved 15 IP's for the VMs: 145.173.136.112-126 So i installed the ...
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32 views

not able set static ip in my virtual machine

Can anyone help me to set a static ip in my virtual linux server machine? I did everything but still I am not able to set a static ip. I did the following changes in /etc/network/interface file. The ...
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23 views

WiFi connection drops every few minutes

I'm running kubuntu 13.10/Linux 3.11.0-2. Every 10-20 minutes, my network connection completely stops, with nothing transmitted or received, but after a while it just comes back. during these drops, ...
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9 views

How to send data through two different PPP connection

I have two Point to Point[ppp0 and ppp1] interfaces in my Ubuntu system. How do I send data through each interface. Presently I am able to send through only once interface. # route -n Kernel IP ...
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7 views

Connect Ubuntu Server to L2TP over IPSec Server

I have an application running on an Ubuntu Server. It needs to connect to a remote SQL server to collect data for the application. The remote server is behind a firewall device that is running an ...
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15 views

What is the cni0 interface seen on ifconfig

What does the cni0 interface denote? cni0 Link encap:Ethernet HWaddr 00:50:F1:80:00:00 UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:3 errors:0 dropped:0 ...
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24 views

TP-Link TLWN725N V2 low signal

I'm using Lubuntu 14.04 - 64 bit, kernel 3.13.0-24-generic. My TPlink, is always with low signal(normally 2%). The other computers are working just fine with other wireless pens, with good quality ...
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IRQ Balancing-RSS-Flow affinity

I am playing with a multi-core system, in which i would like to get maximum ip packet forwarding performance.I am getting 1.2Mpps with Ubuntu 14.04, with new ixgbe driver. But when i am allocating ...
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17 views

how to open port to the world

I have installed postgresql (or any other service for that matter) on ubuntu 14.04.1.LTS I can start postgres and it is running. It accepts connections on port 5432. This is my netstat output: tcp ...
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Wrong throughput measruements in VBox VM running Ubuntu 12.04.3

I have one physical machine with Linux Ubuntu System (Host OS) installed on it. Besides that, the machine runs one Virtual Machine (VM) and one Open vSwitch Bridge. The machine has one virtual ...
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16 views

Problems with Network Manager in Trusty

I have Xubuntu Trusty on a Samsung laptop and have multiple issues with network manager. First it may stop connecting to any wireless network at all (it tries and fails). This happens after I turn ...
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1answer
21 views

SQLSTATE[HY000] Unknown host machine name (severity 2)

I have a problem in which I can not find a solution and I was hoping that you could help me out. I rolled back my server and now none of the php scripts can now connect to other servers. The scripts ...
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13 views

Wake-on-lan from suspend

I am trying to wake up my laptop from suspend using WOL but it didn't work at all. I found this old post for the same problem but I don't see how I can do this for Xubuntu 14.04 that I am using. I ...
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Network disappears from list, disconnects, others remain

and Ubuntu, with my first question. I have Ubuntu installed on three machines alongside Win7, so they are all dual boot. I have encountered a WiFi connection problem on one, a Compaq CQ62. The unit ...
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1answer
16 views

how to set multiple gateway

i need to configure multiple gateways in my ubuntu 12.04 server.For example i have two network card with different subnet ip address.172.10.10.0/24 subnet traffic should go via eth0 and 172.20.20.0/24 ...
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85 views

Ethernet networking issues 14.04

I'm having some real trouble configuring my network in ubuntu server 14.04, I installed using (MAAS) and dhcp configuration hasn't worked, so I continued manually. The problem I'm having is that Eth0 ...
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31 views

Ubuntu BIND in LAN problems - DNS request timed out. timeout was 2 seconds

I've got a BIND9 setup on my local network via Webmin. A nslookup doesn't seem to work. Neither does ping google.de. Been looking around and trying several different settings. Nothing has worked so ...
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13 views

Internet connection problem in ubuntu 13.10 [closed]

I have installed windows7 and ubuntu 13.10 on the same partition. I am using ethernet connection. I can able to connect to internet in windows7 but not in ubuntu. can anyone help me on this issue.
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1answer
24 views

Cant configure existing samba share

I am sorry for the probably dumb question. I have two Ubuntu server VMs - 12.10 and 13.10. A year ago I have configured samba on both machines somehow with documents share on each. Now I cannot find ...
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1answer
28 views

How can I debug intermittent high pings?

Recently my browsing and gaming (CCS) experience has been disturbed by sudden high pings. Here is an example: ping -i 20 google.com PING google.com (173.194.65.139) 56(84) bytes of data. 64 bytes ...
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6 views

“Connect to Hidden Wi-Fi Network…” is disabled in my Ubunutu 14.04!

I noticed that some items in network section of my taskbar is disabled. When Wi-Fi adaptor is enabled and no cable connected network is available, following items are available and only BOLD items are ...
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1answer
23 views

ubuntu server not seeing ethernet port

i am trying to setup ubuntu server on a normal desktop computer. the install went fine (even though it didnt connect to the internet) i figured i would have to change some network config settings. but ...
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1answer
20 views

Can access services on my machine by localhost:port but cannot by ip:port

I wanted to access my machine's http rest service (exposed on port 5000) but I could only do it via accessing localhost:5000 but not via 192.168.1.1:5000 where 192.168.1.1 is my IP. I tried after ...
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1answer
17 views

Is there a ubuntu server menu-based network setup tool like during ubuntu install?

During Ubuntu installation I enjoyed using the "Configure the Network" step: I always assumed that there was some dpkg-reconfigure command that would re-run this, and that if I ever wanted to use ...
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Bridging from a N150 netgear wireless access point to a sky modem

A DVR is connected to some wired cameras. The dvr has an IP output and I have the WN604 Netgear wireless adapter which I have set up as a point to point bridge. I can see the broadcast on my smart ...
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51 views

Significant wifi packet loss on Lenovo Yoga 2 Pro (Intel N 7260)

On my Lenovo Yoga 2 Pro (Network adapter Intel N 7260) I see approximataly 10% packet loss during ping the router. While on the same machine in WIndows there is 0% packet loss. The connection is ...
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68 views

Just installed 14.04 LTS, all apt-get attempts fail, why?

just installed 14.04 LTS from a usb-flash drive I built using the downloaded .iso image and a tool from pendrivelinux.com. I booted the PC off of the usb-drive, and the installation appeared to go ...