Managing and using network connectivity on a Ubuntu system

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How can I change the network configuration on Ubuntu 14.04 server?

I just installed an Ubuntu 14.04 server, and I've discovered that there is no way to make any changes to the network configuration except by rebooting the server. This is on a stock install of Ubuntu ...
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3answers
469 views

Managed vs. Unmanaged switch for Beowulf cluster

I am setting up a very small Beowulf cluster with one master node (my Lenovo laptop) and two server nodes (Dell Optiplex 760s), all currently with Ubuntu 14.04. Can I get away with using an unmanaged ...
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2answers
78 views

Can not access ubuntu computer on my windows xp pc

I can see my ubuntu machine in the work group of my windows xp pc but when i click it says that it is not accessible/no permission/the parameter is incorrect etc.
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1answer
119 views

Why is my wireless network adapter acting in a strange way? (Ubuntu 14.04)

I have a laptop with Intel Centrino Advanced-N 6235 wireless network card, and I'm on Ubuntu 14.04. For almost a week I have had a strange problem with my wireless card. When I plug in the power cable,...
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1answer
282 views

iSCSI + br0 bridge + 14.04.1 Server = does not work

On one of my servers I have: USB 4GB: 1) EFI partition 2) /boot partition iSCSI 50GB (on another fileserver): 3) / partition In /etc/network/interfaces it works flawlessly if I have: auto p3p1 ...
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4answers
230 views

No Wireless Internet Connections Show Up!

Just got Ubuntu on another computer and I've never had this issue. On Windows Vista, (the operating system alongside Ubuntu) The internet works fine. But when I click on the icon in the top right, ...
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1answer
106 views

ssh to different network inteface?

I don't know the right vocabulary to more succinctly ask this question or to search for duplicates: Someone who knows what I'm trying to ask, please edit the title of this post to be more accurate. ...
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0answers
55 views

Unable to get both RA and DHCP6 address on a particular nic

My host is connected to a network that is connected to Router and DHCP6 server. radvd.conf setting on the router is given below: interface eth1 { AdvSendAdvert on; AdvManagedFlag on; ...
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1answer
18k views

How to Share folders in 14.04 Server with Gnome

I'm working with a new installation of Ubuntu Server 14.04 64 bit. During installation I picked the Samba Server option and I believe that it is running. My intention is that an OS X machine will be ...
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1answer
97 views

Network notification balloon stays showed too long

I'd like to know if there is a possibility and where can I adjust the network state notification balloon timer? Actually, if the computer is connected or disconnected to the network, the notification ...
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1answer
779 views

Ubuntu server can access internet but cannot ping systems in the LAN

I have 2 ethernet interface eth0 with IP 192.168.1.11 and eth1 with IP 192.168.1.12 and i have modem/router as 192.168.1.1. I can access internet from this server machine, but cannot access any ...
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0answers
58 views

Wireless Repeater causing kernel to crash

So my wireless set up is not ideal as far as my location relative to my AP goes. However I recently remembered I had/dug up an Amped Wireless 300N repeater (range extender). I set it up in my living ...
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0answers
344 views

TCP hash tables in Linux Kernel

I have implemented a solution to migrate sockets between servers running Linux OS. The migration mechanism works very well and the client is capable of continuing receiving his service from the new ...
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1answer
324 views

Which port and ip addresses are used while installing new ubuntu system

As we know that when, we install the new Ubuntu system and if we are connected to the internet then it can fetches packages from Ubuntu repository. So I have question which port and ip address is ...
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1answer
157 views

Mounting cifs network shares when logging into user account?

I have a couple of network shares mounted with cifs in fstab and it works fine when the network is up. However, this is a laptop and often my wi-fi connection isn't up when mounting is triggered by ...
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1answer
3k views

Multiple DHCP leases on single interface

If I want to have 2 static IP addresses, I can do something like this: auto eth0 iface eth0 inet static address 192.168.1.10 netmask 255.255.255.0 broadcast 192.168.1.255 auto eth0:0 ...
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2answers
518 views

Is it normal for openvpn-client to do this?

I have been using openvpn for a while, on an obscure port ( example, 43012). I've been noticing on my laptop (client) that whenever the vpn is connected, openvpn is listening on port 1194, which I do ...
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1answer
289 views

How to give a Juju charm a static ip address - wordpress

I have a wordpress charm installed via juju. In order for me to access this charm through public ip, I port forwarded the ip into my server's public ip address. Recently, the ip address of the ...
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1answer
186 views

Setting Internet Gateway

Friends, I'm stuck up with problem regarding to network configuration to make my Ubuntu 14.04 server machine as internet gateway in a LAN, and I am a relatively newbie in this regard. My scenario is ...
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2answers
19k views

Ubuntu can not ping Host Name but can ping IP?

well I just went into the Ubuntu world for administration. I found similar threads, except, I am able to ping my own Host name and IP address and my windows can ping my linux host name, but Ubuntu can ...
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2answers
18k views

Wifi Not Working On Ubuntu 14.04 Lenovo G 50-30

I am facing problem to enable wifi on my Lenovo G50-30 Below are the command out put please help me out lspci | grep -i wireless: 02:00.0 Network controller: Realtek Semiconductor Co., Ltd. ...
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2answers
42k views

Network Manager Icon disappeared 14.04

So a couple of weeks ago my network manager icon stopped appearing; I still get automatically connected to my saved networks and the internet works fine, etc. If I go into System Settings and look at ...
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1answer
321 views

Belkin Wireless USB F9L1101v2 incompatible w/ 14.04?

Hey all and thank you for reading. I followed this guide: belkinf9l1101v2 and I can't seem to get it working on my system like this user was able to. Everything actually works properly up until the "...
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1answer
310 views

Created wifi network not showing on other devices

i run ubuntu 14.04. my wireless is working fine. but when i create a wifi network on my laptop, it creates successfully, but other devices cant see it even when i try to connect to a hidden network. ...
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1answer
3k views

what could be blocking port 5060 on my ubuntu 14.04?

I have a ubuntu 14.10, and am trying to telnet into it via port 5060 but I keep failing. I always get the message "Connection closed by foreign host". I checked my iptable, it is default policy to ...
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1answer
224 views

Suddenly lost my wireless connection

I used to have Ubunto 13 installed on my computer, it was the only OS in this computer. One day I was at home, connected to my usual wireless connection, watching a show, and suddenly it stopped ...
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1answer
2k views

can't ping to a friend's computer

I have Ubuntu 14.04 installed and I recently installed the same version from the same CD on my friend's computer. When I try to ping him I don't get any response, when I press Ctrl C to terminate ping ...
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3answers
220 views

No network connection but nameserver ok, no firewall

for two days, my laptop cannot connect to the internet (a.k.a. all machines beyond my router) anymore. I have investigated the following things: The network access worked fine half a week ago. I ...
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0answers
399 views

Connect VM directly to external network in openstack

I have installed openstack using MaaS and JuJu on Ubuntu 14.04 machines. I am using Neutron openstack for networking which is installed on a VM. I can assign a floating IP to VM and ping it. However ,...
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3answers
99 views

No Wireless Connection in newly installed ubuntu [duplicate]

I just installed Ubuntu on my machine and there is no wireless connection. I mean, the wireless card won't even show at the top pane of my desktop. I might also add that whenever the Ubuntu launches, ...
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1answer
74 views

Network drivers for HP compaq

I did not find Network dirver for HP compaq dc79000 small from factor Driver : intel 82567 LM-3 gigabit
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2answers
88 views

On upgrade from 13 to 14, wifi no longer works

I had Ubuntu 13 and wifi worked great. I just upgraded to 14.04. The wifi no longer works. Wired networking works great. I have put the output of wireless_script in http://pastebin.ubuntu.com/...
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1answer
245 views

Two Ubuntu Machines cannot access each other's shares anymore

I have two Ubuntu laptops, both running 14.04 "Trusty Tahr". At one point, they were both able to access each other's shared folders. However, something happened when I was trying to add a third ...
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1answer
627 views

Can't use the internet over wifi

My Macbook 3,1 can connect to my router, but cannot use the connection. I have tried to solve this problem, but not smart enough to do so. That's why I'm turning to you. How I am able to connect to ...
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4answers
830 views

AR9485 - Kubuntu (Ubuntu 14.04.1 LTS) wireless not connecting anymore

I'm running Kubuntu 14.04.1 LTS on a Asus PU301LA RO039G. Wireless and wired connection worked fine until yesterday, when the "I don't know what" happened. Symptom is the unability to connect to my ...
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1answer
651 views

Wi-Fi not working with my router but works with other access points

I recently bought a D-Link router and configured it. From my Android, the access point is providing full internet access. My Ubuntu laptop gets internet access from other access points. The problem ...
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3answers
8k views

Ubuntu 14.04 wired connection not detecting

dual booted Windows with Ubuntu a few weeks back. My Internet connection seems to be automatically detected on Windows, but not on Ubuntu. Here is the output from ifconfig: eth0 Link encap:Ethernet ...
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0answers
165 views

Could not open location 'network://'

I am using Ubuntu 12.04 LTS. I am getting the following error when I click on Network: Could not open location 'network://' DBus error org.freedesktop.DBus.Error.NoReply: Did not receive a ...
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1answer
684 views

Can't see 14.04 server VirtualBox guest from OS X host

I have Ubuntu 14.04 server installed on a Virtual Machine with VirtualBox. I've enabled host-only networking in the VM's settings. When I do ifconfig | grep addr I get an inet addr: 192.168.56.101. I ...
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1answer
465 views

MacMini Ubuntu Desktop 14.04 Headless Boot, Not Accessible, Not Booting

I have a 14.04 Ubuntu Desktop installation on a MacMini running headless in my closet. When I boot the server, it will not assign itself an IP address until I login to a user session. This means ...
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2answers
5k views

Explanation of 70-persistent-net.rules script

I am a newbie in scripting language.I will like to understand a script that was written by someone else.Kindly explain to me what this line of script does: IF=`cat /etc/udev/rules.d/70-persistent-net....
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2answers
4k views

Ubuntu VMs with static ip address in VirtualBox

I'm a beginner in networking and try to setup multiple Ubuntu VMs on VirtualBox for the learning purpose. For the multi-node Hadoop cluster setup, I installed VirtualBox in my laptop and installed ...
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0answers
19 views

Asus PCE-N15 wireless adapter only connecting at 1Mb/s on Ubuntu 14.04 [duplicate]

I have installed an Asus PCE-N15 wireless adapter on my Ubuntu 14.04 install. It sees and connects easily to Wireless networks, but it only connects at 1Mb/s when connected to my TP-Link TL-WR340G ...
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0answers
127 views

How to fix slow and periodic unresponsiveness with my network?

I recently installed Ubuntu 14.04 alongside Windows 7 pro on a Dell Optiplex 380. I am using an Edimax usb network adapter (EW-7811Un). The network / internet works just like my other computers when ...
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1answer
2k views

Port 27005 closed - how can I force it to open? [closed]

I have a VPS (virtual server) hosted by OVH. I run GMod on the VPS; port 27015 is the server port, and that is open. However, 27005 is not. IP tables is blank as I just flushed it and it is ...
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0answers
386 views

install wifi drivers for ubuntu

I need some help to configure my wireless network. I've downloaded Ubuntu 14.04.1 and installed it using a live CD and every thing is working great but the wifi connection starts at 72 mbps and then ...
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0answers
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Network problem: Chrome would not load sites that Firefox does

I am running a Ubuntu 13.04. I had both Chrome and Firefox installed, and the former does not load most websites. There is no proxy, and I have disabled the firewall. I connect to the internet ...
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1answer
1k views

How to set proxy in synaptic package manager?

I am using Synaptic package manager in ubuntu 14.04. How to setup proxy in Synaptic Package Manager?
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1answer
264 views

Setting proxy in Ubuntu terminal - proxy having special characters

I am trying to set proxy for a ubuntu server 12.04. Our proxy user name contains in the format: CompanyName\UserName and Password like: $test I tried to set proxy like this: export http_proxy='...
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1answer
341 views

Need to update /etc/hosts every time I connect to network because of dynamic IP

Every time I connect to the network at work my device gets a new IP address which makes it /etc/hosts/ invalid and my hostname becomes unreachable. I was looking for a way to set /etc/hosts ...