Managing and using network connectivity on a Ubuntu system

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Unable to connect to Internet after wakeup from hibernate?

It says Networking is Disabled. I have tried checking that box (which stays checked); but that does nothing. Even tried: sudo ifconfig wlan0 up; which also did nothing. I'm running Ubuntu 13.10 x64.
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2answers
5k views

Why can't I connect to SSH server from Ubuntu client? (while windows client is okay)

I have configured an ssh server on a Ubuntu 12.04 LTS machine. I changed the listening port to the one different from the default port 22 (that's the only change I made on the server). I am trying to ...
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1answer
173 views

What does it mean for a network interface to be primary?

If I have two network interfaces, like eth0 and wlan0, what does it mean if I configure wlan0 to be primary? Is eth0 disabled and unused until I configure it to be primary? Does it mean the primary ...
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1answer
316 views

PPPOE : How to Set fixed calling number

I'm facing issue with PPPOE connection, Error logs : Dec 29 15:50:20 rahul-home pppd[4141]: PPP session is 1769 Dec 29 15:50:20 rahul-home pppd[4141]: Connected to 00:27:0e:14:d1:04 via interface ...
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1answer
473 views

Routing Host Traffic through KVM Guest

I'm trying to get my host to route its traffic through a KVM guest(Untangle), but I'm not having any luck with basic IP table rules. Right now, I have all traffic being received by the host on eth2 ...
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2answers
2k views

Howto configure MAAS to separate PXE traffic and IPMI traffic on different subnets?

I am trying to set up a part of our network as a linux cluster. Since its a little educational for me, I choose using MAAS with JuJu. However there are some questions that boggle my mind and I was ...
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0answers
341 views

Very slow Wifi with DWA-140 REV:B2 Wifi Dongle

My wifi is extremely slow when I am using my Wifi USB adapter DWA-140 in Ubuntu 13.10 64bit. In Windows I can easily get speeds of 3-3.5 MB/s. In Ubuntu it has its peaks around 400 kb/s. I have ...
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1answer
1k views

Screwed up DNS settings in 13.10

When I run nslookup internal.foo.com I get Server: 127.0.1.1 Address: 127.0.1.1#53 ** server can't find internal.foo.com: NXDOMAIN For some reason, I am not getting the ...
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2answers
692 views

Sharing Internet Connection (DHCP) through a Wireless Hotspot

I have an internet connection through a cable modem. The IP address on the cable modem is not static and is perhaps obtained through a DHCP mode. I wish to share this internet connection through ...
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1answer
397 views

Wireless won't connect in Ubuntu 13.10

I have now worked a while with Ubuntu but still not really into it. However everything worked fine after the Installation, now about after a weak I'm getting issues with my wifi. In the beginning all ...
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1answer
69 views

Can we push software to clients ?

We need HTcondor to be installed on computers in network Which is our own campus network for throughput computing, we need maximum nodes so we can do it in a better way. Mentioned network have many ...
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1answer
833 views

Cannot delete wired connection

I'm trying to delete a wired connection from network manager in Kubuntu Saucy (Converted and upgraded from Lubuntu Raring). It asks me for confirmation, which I give, but the connection doesn't get ...
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2answers
287 views

Setting a hotkey for connecting and disconnecting a network connection in KDE environment

Is there a way to set a hotkey for toggling connection through a network cable: Also if I have a command in command-line that can do this or a piece of C++ code that does this I can set a hotkey ...
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1answer
518 views

Wifi Hostspot setup for Cable Modem Connection

I have a broadband connection through my ISP (Hathway), using a cable modem. I wish to share the internet connection to my laptop, and the phone. Refer to this configuration guide at 12.10 Wireless ...
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0answers
353 views

WiFi causing router crash when laptop runs off battery

I'm experiencing a strange problem on my Lenovo Carbon X1 laptop with a fresh Ubuntu install. The WiFi appears to work fine when the external power source is connected. However as soon as the power ...
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2answers
78 views

Network manager and sutdown not working

Most of the functionality have stopped working after I changed the permission of lib folder. Network manager, shutdown/restart, DVD drive everything stopped working. Can some one lead me to the right ...
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1answer
2k views

how to show GUI of ns2?

I have installed NS2 (network simulator 2.34) on my ubuntu 12.4. But when I execute the ns ns-simple.tcl in the terminal only the following messages have been shown without any GUI or schematic of my ...
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1answer
922 views

How does 'telnet localhost' work?

I created a simple server program and connects a client to it using terminal. In the terminal window, the command telnet localhost [port number] was used. Can anyone please tell me how this command ...
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1answer
248 views

Ubuntu 13.10 Wifi Fail after attempting to connect to an ad-hoc network

My WiFi was working for several months with the network-manager in Ubuntu. A couple of days ago, I tried to connect to an ad-hoc network. Afterwards I have not been able to connect to any wireless ...
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1answer
1k views

Are my ports opened?

Im using virtual server on hosting. There is Ubuntu 12.04 LTS. Im building pool websites, and stratum mining. I can connect to stratum on port 3333 via minerd on server, but cant connect from outside ...
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1answer
124 views

WiFi not working on Ubuntu 12.04 after upgrade from 10.04

After the upgrade from Ubuntu 10.04 to Ubuntu 12.04, my system stopped working. I tried many many commands even then it didn't seem to work. It displayed: Ubuntu is running in low graphics I ...
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1answer
3k views

native IPv6 setup

I got following information from my provider: Range: 2a00:1630:2:801::/64 Gateway: 2a00:1630:2:800::1 Netmask: /56 My config file: iface eth0 inet6 static address netmask 56 gateway ...
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2answers
7k views

Change default port for remote desktop sharing 12.04 LTS

Basically I want to be able to access different computers remotely (all on Ubuntu 12.04 LTS) that are on the same wireless network. I've gotten this to work for one computer by forwarding port 5900 on ...
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3answers
20k views

My eth0 has gone and I don't have internet and network connection

I had internet connection, but when I upgraded my VGA and restarted my PC then everything for eth0 has gone. When I used ifdown: ifdown: interface eth0 not configured Is there something I ...
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1answer
932 views

How to connect raspberry pi into Ubuntu?

I just picked myself up a raspberry pi, I am trying to connect the pi to my computer via Ethernet to access my video files. So far it seems to not notice any ethernet connection to my computer. I am ...
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2answers
2k views

Belkin F7D1102 N150/Surf Micro Wireless Adapter- connectivity problems

The network manager keeps prompting me for a password, while i'm sure it's correct. Sometimes it connects for a minute. When i used windows 8 at the same place with the same router, i didn't have this ...
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2answers
221 views

Can't connect to certain sites

I've been having an odd issue for months (8-12?) now, and I'm out of ideas. I own a site, hosted by GoDaddy, that I can't connect to only from my Ubuntu laptops. I have two (Ubuntu 12.04.3 LTS and ...
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1answer
420 views

Set openDNS on ubuntu server 12.04.3

How can i set to use openDNS on my ubuntu server? I am virtualizing for improvement at home, so i don't want to change router configuration etc.. I tried setting it on the file /etc/resolv.conf but ...
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1answer
153 views

using rsync within the terminal

I am relatively new to Linux(Ubuntu 12.04) . I am researching on how to use rsync to backup a certain folder from my local (ubuntu) computer to my windows xp networked (shared) computer. What I want ...
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0answers
32 views

Does “everything is a file” apply to network printers?

If "everything is a file," can I access network (IPP) printers like USB printers (/dev/usb/lp0)? If so, where?
0
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1answer
3k views

Samba share not visible from Windows 7 PC, even though UNC authentication works

I'm running XBMCBuntu 12.10 on an HTPC with the server hostname 'SCREEN', and trying to setup Samba to allow access to a share called 'Movies' by mapping username/password credentials to a unix user ...
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3answers
9k views

Can't ping any websites, but can access websites through browser

I'm using Ubuntu 13.10 running on the newest version of Macbook Pro (dual boot). I'm using wireless connection to access websites through the Chrome browser and it works. But ping doesn't work. For ...
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1answer
2k views

how to connect vodafone k3800 dongle in ubuntu 12.04

I have tried to connect vodafone k3800 dongle but it cannot be connected even when dongle Indicating green light ( It means GRRS is connected ).. Help Please!! I am New to ubuntu
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1answer
98 views

Beginner in networking please help - file sharing

Hello I am new to Linux Ubuntu, I have a spare PC laying around and I wanted to make it a file/media sharing server. I cannot even figure out how to get Ubuntu to see my windows 8 pc nor can I get my ...
0
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1answer
224 views

How to setup an access point for two wireless networks of which one ends on a VPN?

I currently have an Ubuntu machine, which I'd like to use as a access point/proxy server. Now, due to the requirements I have, it's going to be a fairly complex (for a beginner...) setup. The ...
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1answer
3k views

Ubuntu Server wont recognize ethernet

I have recently acquired an old computer that I tried to install Ubuntu 12.04.3 server onto, however the system could not be booted into any external medias (USB and CD drives). So I hooked the hard ...
0
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1answer
179 views

Not able to copy any folder from samba share network

I am connected to a windows network and i am coping a directory from my windows share, it starts coping but the progress bar stops in the middle without any error message and it does not copy. But i ...
0
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1answer
593 views

How to connect Ubuntu to University LAN (Windows, Static IPs) to use Internet?

I have always been a Windows user, and this is the first time I have installed Ubuntu 12.04. After installing Ubuntu, I am not being able to access college internet through my laptop. We have a wired ...
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1answer
247 views

How ca I enable port to be accessible on public ip

I have Ubuntu server I am trying to the port 8550 to be accessible on the server public IP address, I can hit the web service running on that port from the server itself but not from the public IP ...
0
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1answer
1k views

I can't - install Broadcom STA wireless driver, connect to wifi, connect to Ethernet wired connection

I bought a Dell Vostro 2520 two days back and when I clicked wifi icon to connect to my wifi network, I couldn't see mine or any other wifi networks. So I then realized that I need to install a driver ...
1
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1answer
21k views

How to reserve IP Address in DHCP Server

I install DHCP Server with https://help.ubuntu.com/lts/serverguide/dhcp.html but I need to make reserve IP addresses for specific machine (192.168.1.XXX) and further to assign a name to each machine ...
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4answers
2k views

Juniper Crashing right after launching

I am running Ubuntu 13.10 x64 and have 64 and 32 bit versions of Java 6 installed. I have it configured that when running Network Connect it will run the 32 bit version and for anything else the 64 ...
2
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1answer
4k views

Cannot see WiFi channels above 11 despite setting region

I'm unable to see WiFi networks with channels above 11, despite having set my regulatory region to one in which channels 12 and 13 are allowed. I followed the advice in the question 'How to use Wi-Fi ...
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1answer
323 views

Ubuntu 12.04 LTS Network Icon Mistaken

After some diagonic processure, I've found that my wireless network has not yet resolved but my wired connection has mistaken the wrong icon. eth0 Link encap:Ethernet HWaddr 20:6a:8a:3f:70:90 ...
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0answers
94 views

12.04 LTS not able connect to internet when installed, but could connect using LiveCD before installation

I met a strange problem. When I use LiveCD to install ubuntu 12.04 LTS, I was able to connect to Internet through wired connection, choosing "Try Ubuntu". But when I installed it, it could not ...
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0answers
12k views

Command to know my external IP address? [duplicate]

How can I get my external IP address using the Command Line?
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0answers
408 views

ubuntu server/samba file sharing disconnection during use

I apologise in advance if i include needless information; Firstly my network is setup with ubuntu server 12.04 LTS -> netgear modem router -> ethernet cable -> belkin router as wireless access point ...
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3answers
146 views

Cannot get wireless network after suspend [duplicate]

I've been working on an issue of calculation for months, but I can't get my wireless card to work. It always shows to me : Device not ready. My laptop is Acer 4750g with Qualcomm Atheros AR9287 ...
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1answer
122 views

12.04 - cannot access wireless at work but can access it at home

I'm new to ubuntu, and haven't used UNIX since my college days in the 90s. I just installed 12.04 and, after the update, it attached to my home wireless network just fine. Unfortunately, at work no ...
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1answer
96 views

12.04 LTS server - no wifi

Someone installed Ubuntu 12.04 LTS for me on my Lenovo S210 IdeaPad but there's no WIFI access. and I can't ping anything other than the static IP. lspci -nnk |grep - e ":" -e driver |grep ath Kernel ...