Managing and using network connectivity on a Ubuntu system

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Two ethernet ports on motherboard. How can I get double the bandwidth?

Direct Question: My evga classified motherboard has two ethernet ports. I want to use them simultaneously to improve the speed of a remote connection. (Yay for programming remotely). How do I do ...
13
votes
1answer
40k views

How to transfer files between Ubuntu and Windows

I wanna transfer some files from this PC with Ubuntu to a PC with Windows 7 I don't care how to do it (ftp, samba or whatever) I wanna know the steps, I searched a lot but I can't find anything that ...
13
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9answers
117k views

How to configure proxy authentication to work with Ubuntu Software Center?

I have tried put in apt config Acquire::http::proxy, and in Network>Network proxy with and without user:password@server:port and using environment variables http_proxy and https_proxy. Nothing seems ...
13
votes
5answers
12k views

Internet slow on Ubuntu but not windows using a RTL8111

I have just installed a dual boot windows7 /ubuntu 11.10 and the internet is much slower than windows. I have read the post here and tried the solutions presented and none have worked. Here is what I ...
13
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4answers
421 views

How to know what other systems are trying to get into Ubuntu?

I am currently using Ubuntu Desktop 11.04 and enabled the firewall using GUFW. I have also disabled all the unnecessary services. I am connected to the internet and would like to know details of any ...
12
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2answers
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How do I add an additional IP address to /etc/network/interfaces?

I have an extra IP address available to my server, and so I need to assign it in the interfaces file. At the moment, I've got this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static ...
12
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3answers
12k views

Configuring Firefox to use a proxy from the command line

I'm looking for a way to tell Firefox to use a proxy in Ubuntu Ludid (10.04.1 LTS). I'm installing Ubuntu semi-automatically on several identical machines. For this, I use a script that, amongst ...
12
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1answer
2k views

What are all these connections holding up my network?

I have a ubuntu box running 14.04 , Over the past couple days I have been having network issues on all my devices. This ubuntu box is wired directly into router. After some common trouble shooting ...
12
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3answers
44k views

What's the default /etc/network/interfaces?

I messed up my network configuration. Can anyone help me and copy the default /etc/network/interfaces?
12
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3answers
28k views

Proxy exceptions in 12.04 LTS

How do I setup proxy exceptions under Ubuntu 12.04? Already tried the proposed solutions for earlier Ubuntu versions and none seem to work. There is no Network Proxy Preferences in 12.04 AFAIK. ...
12
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1answer
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How do I ignore a proxy if not available?

Following the instructions in Best way to cache apt downloads on a LAN?, I've set up a caching proxy in my local network. Since that machine is not always up, I'd like to be able to refresh the ...
12
votes
1answer
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Should I set up my CUPS Printing to use IPP, LPD or URL?

When I got to add a network printer, I'm always confronted with the same dilemma: Do I set up the printer via IPP, LPD, or using it's IP address (AppSocket/Jetdirect?) and why? What are the ...
12
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1answer
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what does mean dns-seach option in /etc/network/interfaces

can anybody describe me about dns-search directive in /etc/network/interfaces file: iface eth0 inet static address 192.168.3.3 netmask 255.255.255.0 gateway 192.168.3.1 dns-search ...
12
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6answers
5k views

How to control an Ubuntu PC from another Ubuntu PC over Internet, using mobile broadband connections?

There are two Ubuntu PCs called A and B. A and B are connected to the Internet using two separated Internet connections. (In my case, two mobile broadband connections ppp0 x2 ) Each connection has a ...
12
votes
1answer
4k views

Automatically disable wifi (wireless) when wired?

What's the best way to automatically disable my Wifi/wireless connection whenever I plug in a wired Ethernet cable? I'd like it to be re-enabled when I later unplug the wire. Also, I sometimes like ...
12
votes
1answer
18k views

Networking with Multiple Nics

I have an Ubuntu 12.04 server with 4 Network adapters in it. I need to use each NIC for a separate function. Here is a description of my setup: etho = 10.234.0.2 netmask = 255.255.255.252 gw = ...
12
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1answer
23k views

How can I make VirtualBox guests share the host's VPN connection?

Question When I start my VPN on my ubuntu desktop computer which acts as a router, the attached subnet loses internet connectivity, but is still accessible (LAN). Ideally, I would like to know how to ...
12
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4answers
29k views

Editing network interfaces without system rebooting

I'd like to make some changes to my networking configuration by editing my /etc/network/interfaces file. What's the cleanest way to make changes to this file and have them take effect, without having ...
12
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2answers
5k views

How to configure an OpenVPN Client Router

I am attempting to set up an OpenVPN Router so that I may connect my tablet (wireless) and Blu-Ray (wired) to a paid VPN service in another country on Ubuntu 12.10. I have successfully done this using ...
11
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4answers
8k views

How to monitor bandwidth usage?

I am using Ubuntu 14.04. My internet connection is pretty slow (512 kbps). Sometimes I see that I have no software running which should download anything from the internet, but the system monitor ...
11
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5answers
892 views

I accidentally deleted the network-manager and don't have access to internet anymore

I cannot connect to any wifi connection since I deleted the network-manager. Is there any way to get it from another computer and then install it on mine or is there a way I can get an internet ...
11
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3answers
88k views

Command to get the hostname of remote server using IP address

I want to get the hostname of a remote server using the IP address using my Ubuntu. In Windows we can get using NBTSTAT but this doesn't work in Linux. Does anyone know how to do that?
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5answers
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Network connection error after suspend Ubuntu 14.04 [duplicate]

I'm using ubuntu 14.04 and a DSL connection for internet. However, whenever I suspend and resume my session, I'm no longer able to connect to the internet. Could someone help me fix this?
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3answers
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Using scp to copy files from remote to home machine

This is probably a simple error, but I can't work it out. My computer hostname is Felix (hostname -f returns Felix) I am trying to move a file from my university account to my home computer using scp. ...
11
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2answers
10k views

How to disable/enable automatically connecting to WiFi?

Whenever I restart my WiFi router, Ubuntu tries to connect to my neighbours' WiFi networks. There's over 30 wireless networks in the area. Ubuntu prompts me for the password to all of those. This is ...
11
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3answers
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How do I connect to a server with thunar in Xubuntu?

In Ubuntu running Gnome 2 you were able to select "Connect to Server" from the Places menu and you would get a graphical connection to whatever server you connected to. Example: How can you do ...
11
votes
1answer
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What are ICMP redirects and should they be blocked?

After enabling ufw and the Tiger security auditor, I see warnings saying: The system accepts ICMP redirection messages What are ICMP redirection messages? Should they be disabled for security ...
11
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2answers
27k views

Which type of VirtualBox networking should I use? [closed]

I'm trying to use VirtualBox on my Mac to host a couple of VMs. Host OS: Mac OSX 10.7.2 Guest OS: ubuntu 11.10 server 32-bit Each VM should be able to connect to the Internet (this is needed ...
11
votes
8answers
18k views

How to make my proxy settings change depending on the network I connect to?

My company's corporate network requires me to set a network proxy to access the net, but when I am anywhere else, I don't need it. The proxy settings in Ubuntu (System -> Preferences -> Proxy server) ...
11
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2answers
9k views

persist port routing from 80 to 8080

I use amazon EC2 instance which works via ubuntu. By default according security restrictions I can't bin my application to port 80, so I just bind it port 8080 and then set routing redirect from port ...
11
votes
1answer
1k views

hp-probe find printer network or alternative

I am working in a environment where we have different network. One of them are used for printers (192.168.x.x) and 1 for wireless network (10.1.x.x). I need to add a printer HP C3505 (192.168.x.x) on ...
11
votes
3answers
6k views

How can I set up a Dynamic DNS fetching service on Ubuntu Server?

I've created accounts and hostnames within my http://no-ip.org/ account, which is by far the most commonly used service for my type of server. Can somebody walk me through the configuration process ...
11
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1answer
3k views

Nethogs ioctl failed while establishing local IP

When I typed sudo nethogs eth0 in terminal and tried to monitor my internet bandwidth, I got an error ioctl failed while establishing local IP for selected device eth0. You may specify the device on ...
11
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3answers
4k views

Is there a tool for validating /etc/network/interfaces files?

I always like to test new config files before deploying them--with tools like apachectl configtest and named-checkconf. It's rare that mistakes crop up, but catching them before deployment ...
11
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5answers
8k views

Wake from hibernate on ssh request

Is there a feature (or aptitude package) in Ubuntu 10.04 that will wake my computer up from standby when it gets an ssh (or other webrequest). I've been trying to put my computer in hibernate/standby ...
11
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3answers
23k views

What does “ping: sendmsg: No buffer space available” mean?

I had an intermittent issue (which resolves itself spontaneously, after using a different connection for a while) that caused Internet requests to fail, with one particular wireless network. After ...
10
votes
7answers
16k views

Is there a program to see channels used by wifi networks (similar to Vistumbler) in Ubuntu?

I need to see the channels used by all wifi networks in range in order to improve my wifi connection by selecting the channel to be used by my modem (a procedure related to the 'freebox' modem). In ...
10
votes
2answers
31k views

How can I setup SSH so that it is restricted to my local network?

I'm trying to link my new laptop running 11.10 to my old laptop running 8.04 through my router using SSH. This question is asked and answered on ubuntuforums here: ...
10
votes
2answers
23k views

Cannot connect to WPA2/WPA Enterprise (PEAP and MSCHAP)

I cannot connect to my campus Wi-Fi connection through Ubuntu 13.04 but I can do the same through Windows. [ 1293.944518] wlan0: authenticate with 00:1a:1e:d5:f0:30 [ 1293.953216] wlan0: send auth to ...
10
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9answers
24k views

Wireless Network in Virtualbox

I just installed my first Ubuntu Server (12.04) instance and immediately ran into the following problems: Running apt-get install or update fails (see below) Running ifconfig produces peculiar IP ...
10
votes
5answers
13k views

Why does Skype suddenly fail to log in? Turns out, it's tor!

I am not sure if I'm looking at a network problem or a bug here. Since the update to 4.2.0.11 my Skype can't connect any more. My room-mate has the same problem. We're both on Ubuntu Raring Ringtail ...
10
votes
10answers
5k views

Can't browse the internet nor ping a host, but dig works

I am not able to browse any websites. Please take a look at the following error: karthick@karthick:~$ ping www.google.com ping: unknown host www.google.com Update ...
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9answers
55k views

How to check if Network Proxy is really applied?

I'm trying to set Network Proxy to use my LAN's internet connection to update packages. while the proxy settings works on my firefox, but the package manager still cannot connect to Internet. I have ...
10
votes
4answers
31k views

How to uninstall teamviewer 7 — package doesn't appear in the software center

I previously installed teamviewer 7 on my Ubuntu 12.04 32-bit system. However, now I'd like to uninstall it, and I don't see an easy way to do it. Normally, I'd look in the Ubuntu software center, ...
10
votes
5answers
25k views

Why is the /etc/hosts file not working?

I have been having problems with this for a while and have tried everything I know, so I figured it was finally time to ask for some help. Any edit I make to /etc/hosts just doesn't work. Example: ...
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2answers
1k views

Is it possible to auto-mount sshfs

Is it possible to auto-mount a remote FS using sshfs upon instantiating a proper VPN connection? Allow me to explain the scenario, I'm working remotely, to do that it helps if I can mount my home dir ...
10
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4answers
5k views

Why does my internet speed roughly *double* when switching from Ubuntu to Win XP?

From the same Ethernet-socket from the same machine (IBM Thinkpad X41) I get > 40 Mbps from Win XP ~ 18 Mbps from Ubuntu Apart from the fact that I'm officially paying for 50 Mbps and that for ...
10
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2answers
10k views

How can I enable wake-on-lan permanently?

I want to enable wake-on-lan for my network cards, for always. The community guide recommends adding the relevant command to /etc/network/interfaces. In past experiences editing Ubuntu conf files, ...
10
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3answers
6k views

Call script after connecting to a wireless network

Is there a way for me to call a shell script once I connect to a specific wireless network? Reason I want to do this is I have to login to the network before I can start using it and I would like to ...
10
votes
3answers
8k views

Any way to restore connect to windows share as a different user?

When I upgraded to Ubuntu 13.04 the file manager lost the ability to connect to windows shares as a specific user(from 'connect to server') from the file manager. I could be connected to z share as ...