Managing and using network connectivity on a Ubuntu system

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DynDns change by going to a web page (http) in terminal

I have a ISP with DynDns service where I am supposed to make the server use http to communicate with the DynDns servers at the ISP. It goes like this: ...
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1answer
210 views

Mobile Broadband is not working

This seems to be a huge problem! In my network dropdown menu there are so many items such as the image shown below, all of them are not been used by me any time since the first session of ubuntu after ...
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1answer
3k views

Routing table incorrect at startup

Whenever I reboot my Ubuntu server, the routing table is incorrect for the default route. The routing table correctly specifies the LAN IP address 192.168.124.0/24. All other traffic should go through ...
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0answers
661 views

Ubuntu MAAS DHCP working DNS Not working

I setup Ubuntu 14.04 MAAS on one server. I setup interface to manage DHCP and DNS via the Cluster interface. DHCP is working. But, DNS is not! When I try to add another node, it is doing PXE boot, ...
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2answers
2k views

I messed up my /etc/hosts and /etc/resolv.conf files, now my network doesn't work. How can I reset it?

I tweaked my system by installing ftp server and a dns server. I think in the process I messed up resolv.conf and the hosts file. Now I want to restore it but am not able to do so. I am using ...
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1answer
437 views

ASUS PCE-AC66 & bcmwl-kernel-source: unstable connection with frequent disconnections

Yesterday I bought myself new wi-fi adapter (ASUS PCE-AC66). It works perfect on Windows 7, but today I tried to use it with fresh installation of Kubuntu 14.04, and it's a complete nightmare. I ...
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3answers
21k views

System wide Proxy settings when on a windows network with a password

I'm using Ubuntu on a windows network. I want to connect to the world wide web. I have followed the steps here which I have found very useful. However when I try to ping a website (eg: ping ...
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1answer
386 views

MAAS and Openstack Network

Trying to figure out the best way for openstack and MAAS networks to co-exist. Assuming MAAS used 10.0.0.0/24 for provisioning of various openstack nodes, once openstack, with quantum, is deployed ...
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1answer
135 views

keep getting added to hosts.deny + iptables

I am confused to why this has started to happen. On my local network, if I click 10-20 apache/http links my server will decide to add me hosts.deny file and block me on iptables. Its not just ...
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62 views

trouble connecting to WIFI Network with Ubuntu 14.04

Good morning, I work for a school board in Montreal and we are introducing Ubuntu and it's derivatives as a solution to give our older technology new life. We have mostly used ubuntu and Edubuntu ...
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1answer
2k views

Inspite of set network-mode 3G type, getting 2G connection with mobile broadband

I have set 3G type at mobile-broadband setting: But I still getting 2G (EDGE) type very-slow connection: Also 3G network available as following: How to solve this and get only 3G (HSPA/WCDMA) ...
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1answer
36 views

What kind of traffic is going to ec2-54-83-181-212.compute?

I'm toying with some tools to monitor the network traffic going to and from my laptop. Specifically, I'm using iftop and nethogs. I am constantly seing traffic with a site reported as ...
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1answer
938 views

Configuring network to set wlan0 as primary

I recently had to rebuild my pc and decided to go for ubuntu 14.04. I think the mistake I made was I started from a 12.04 install disk instead of the 12.10 disk I'd used previously and when given the ...
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1answer
80 views

Set Up IP in Ubuntu 12.04 LTS

I am trying to set IP's for a Wired connection in Ubuntu via the Network Connections GUI. However, In wired connections, when I select Manual IPv4 settings the "SAVE" button get greyed out and I can't ...
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1answer
195 views

Why hasn't 14.04 (64-bit) claimed my Intel PRO/100 VE ethernet connection?

I've installed 14.04 on my old Sony Vaio VGN-FE41E and the Ethernet connection does not work. sudo lshw *-network UNCLAIMED description: Ethernet controller product: PRO/100 VE Network Connection ...
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2answers
10k views

Can't use two network interfaces at the same time

I have a problem. First of all, I wan to set up a server on Ubuntu 14.04. I have 2 interfaces: eth0 for dhcp server and eth1 for internet connection. But if I connect to two networks at the same time, ...
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1answer
938 views

automatic switch between the Wifi and ethernet in Linux using command line

I want to switch between the Wifi and ethernet in Linux (Ubuntu 10.04) . I have searched many ways and I found it can be done using firestarter — autoswitch between wired and wireless networks . For ...
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1answer
153 views

Lubuntu not connect to internet after placing the static address

I'm using Lubuntu. (/etc/network/interfaces) to change the IP of my network card so all remaining static as follows auto lo iface lo inet loopback auto eth0 iface eth0 inet static address ...
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1answer
62 views

tcp connection last activity or open timestamp

Is there a way to get an open tcp connections latest activity timestamp or first open timestamp? I am trying to recycle some tcp connections and I would like to do it fairly.
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547 views

MAAS DHCP Server Setup, PXE TO1 TFTP File Not Found

I am setting Ubuntu 14.04 MAAS Cluoud. I have setup the region and cluster controller. For some reason, MAAS was not running DHCP even though (1) maas-dhcp and maas-dns were installed, and (2) Added a ...
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1answer
102 views

How can I create a script that allows all users to change network connections?

I want to create a bash script to enable all users to connect to wireless networks. Following the instructions on this page, I can set that and it works. However, I want to be able to do this more ...
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1answer
57 views

Start & Stop internet connexion without broking Network Manager

I am on Precise. I used this command (with an alias), to close the network, dbus-send --system --print-reply --reply-timeout=120000 --type=method_call --dest=org.freedesktop.NetworkManager ...
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116 views

Ubuntu connects to wireless but doesn't work!

I just installed Ubuntu 14.04 LTS on my laptop, it connects to my wireless network and shows that it is connected, but when I try to load a webpage or do anything like download Steam for Dota 2, it ...
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1answer
2k views

Setup my ssh server, can't connect remotely

I installed openssh-server. I am able to ssh into the server via my ehternet local network, I can ssh from the local host. I have set up port forwarding on my router. I have run 'sudo ufw allow ...
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1answer
2k views

No more internet connection after update in 14.04 with Intel Dual Band Wireless AC 7260

My Dell XPS 15 (haswell) was working fine until I stupidly accepted recently to apply Ubuntu updates. Since then, my wifi does not work (it shows "device not managed" when clicking wifi icon in ...
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1answer
97 views

Vanishing printers under Ubuntu 14.04

What causes printer to 'vanish' from the CUPS printers.conf file under Ubuntu 14.04 LTS? I have a network of DRBL booted workstations and one of the network served printers keeps 'vanishing'. Here is ...
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3answers
6k views

override dns nameserver [duplicate]

i wish to set higher priority for my dns nameservers, or override the ones that are being set by the dhcp server. no matter which approach i took, nslookup never displays the right dns nameserver. ...
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2answers
5k views

Why is Samba not adding a new user with “samba-tool”?

I'm trying to configure a Samba share on my Dell Poweredge 860 running server 14.04 LTS. Samba came uninstalled (when I chose it), so I just need to configure it. I'm trying to connect it to my ...
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0answers
265 views

Moved a VBox guest to a physical host; network is up, but OpenSSH is not. Why?

I've come a cross an issue I really don't understand. I wanted to install Ubuntu Server on a headless box I have. The desktop sits right next to it, and adding and removing disks are very easy, so I ...
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1answer
114 views

How to make my MTS Mblaze to be usable in Ubuntu 14.04

I had an online chat with MTS Customer Care and they say their device does not support Ubuntu 14.04 but only older versions. Does anybody know how to configure it to be usable in Ubuntu 14.04, because ...
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3answers
936 views

Browsing is slow on LAN but works fine on wireless

Internet works perfectly on every other router, but browsing sucks at home (slow browsing and slow loading times). I changed DNS servers to 8.8.0.0, still doesn't help. And funnily, download speed is ...
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0answers
2k views

Apache Timeout (Problem loading page) on localhost

I am running a php script locally in my Firefox web browser. After exactly 300 seconds I get an error page. "Problem loading page. The connection has timed out. The server at localhost is taking too ...
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2answers
2k views

Ubuntu won't connect to Network through Ethernet

I have just built a Desktop Computer and I have created a Live USB with Ubuntu 14.04. I boot to the USB to "Try Ubuntu" and everything works fine, but the computer refuses to connect to the Network ...
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0answers
57 views

Is it possible to set a VPN through Tor? and have functionality for Software Updates?

Gday, I have been trying to do a software update on Trusty both on terminal and software update app but that hasnt been successful, apparently my ISP has a broken transparent proxy. ...
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1answer
3k views

Connect to FTP via Nautilus connect to server

I want to connect other ubuntu machines on my network. I use Nautilus FTP connection manager for it, but it ended up with connection refused by server error. I install vsftpd but it still shows some ...
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2answers
4k views

Intermittent wired network issues in 14.04

Since yesterday, my wired network connection has been dropping for a couple of seconds every 30 seconds or so. To my knowledge, I had not made any changes to my network. Output of ifconfig -a: ➜ ~ ...
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1answer
43 views

Transfer a ssh session between the same physical devices from one network to another

My server has 2 IP addresses via two networks. Due to some restrictions,my client will be able to access only one of the network at a time. Hence, I want a way to transfer a live ssh session with all ...
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1answer
2k views

How to open the ports on firewall in Ubuntu? [duplicate]

I'm pretty new to Ubuntu. I just want to open the most common ports namely FTP (port 20 TCP/UDP) HTTP (port 80 TCP/UDP) SMTP (port 25 TCP) ETC I've tried all the ways in iptables, ufw, and gufw. ...
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1answer
188 views

Unable to connect to Internet on Desktop via Ethernet

Desktop computer it's not connecting to internet via Ethernet. It shows the loading connection animation on the top panel but it never connects, it just keeps loading... The network card is NVIDIA ...
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1answer
702 views

Broadcom Card not Working

Just installed Lubuntu 14.04. Like so many others, can't get the Broadcom card to work. Have tried just about all the recommendations I can find, but still no luck. Ethernet works fine, but there ...
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1answer
73 views

How to set permanent ip address from script

Like this post states I can edit the file to have some Ip address configuration. Is it possible to have some command line utility. which does it for me? like: sudo configutilcommand -mode static ...
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1answer
576 views

Wifi has stopped working in Ubuntu 14.04 desktop

Usually wifi connects itself without problems when I boot my PC. Earlier today my PC suddenly re-booted itself, as if there had been a momentary power-cut, but I did not notice my lights flicker, and ...
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1answer
5k views

Why do I have 2 IP addresses for the same computer?

I have a question. So I have a 32-bit Ubuntu Server 12.04 LTS set up on one of my computers. I set up a static IP address for this computer, but now when I go see what devices are using my internet, ...
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2answers
4k views

Hide/remove network printers from printing dialog

I have four printers if I go to dash and then printers. However, if when I print in the dialog there are many printers (100?) that show up that I have never seen/installed. I'm guessing they're ...
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1answer
152 views

How to temporarily block network access to root user?

Just want to temporarily block network access sometimes, even to the root user. How can I do this?
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1answer
3k views

wifi hotspot configuration [duplicate]

I was trying to activate network sharing on my computer and I had this error message from the terminal Your wireless card or driver does not support Access Point mode. My wireless card info is as ...
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1answer
423 views

Wireless is detected, but not connecting. Ethernet works. How to correct the wireless address?

I am running Ubuntu 14.04 with cable internet, and my wireless is detected and connected, but I cannot connect to the internet. I know the problem is with my machine because other machines are ...
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135 views

Ubuntu Randomly Rejecting Hosts

currently I am facing a very strange problem: my Ubuntu is randomly resetting connections and I have no clue why. /etc/hosts.deny is empty (resp. just the default file with comments only, that comes ...
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1answer
5k views

How to share files between two Ubuntu 14.04 computers [duplicate]

I've trying to share files between my two computers by WIFI and SAMBA. I checked share option in folder properties and tried to connect to other computer by smb://ip. But without succes. Could some ...
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3answers
890 views

Short but (very) consistent lag spikes after upgrading to Ubuntu 14.04

After upgrading to Ubuntu 14.04 I started noticing short but consistent spikes in my daily internet usage (It became most apparent when playing online games through Steam). These spikes occur every ~2 ...