Ubuntu Networking :: Check Which Program Is Using The Internet Connection?
Feb 11, 2010
I'm using Ubuntu 9.10. My internet connection is an ADSL which I have set up using "pppoeconf". The connection starts at boot up. I can also start it if needed by using "sudo pon dsl-provider" and can stop it by using "poff dsl-provider".Recently I noticed that when I start my computer, there is some program (or programs) which is connecting automatically to the internet and downloading and uploading a lot of data. The data transferred can exceed 200 mb or 300 mb in an hour. I don't know what is being uploaded or downloaded.I know for sure that no file sharing programs like bittorrent clients are started at bootup so it is strange that this much data to be downloaded and uploaded without me sharing files or downloading files explicitly. The update software also does not run by default as I have opted to start it manually.
Is there any application which shows the programs that are connected to any particular port and transmitting and receiving data?In Windows XP I use a program called "What's Running" which clearly lists the programs using the different ports in the local machine and the remote IP addresses that the program is connected to. It also shows which program is transmitting and receiving data at any point in time. Is there any similar program for Linux?My internet connection is a data limited package otherwise I probably would not have bothered.
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Jun 24, 2011
My internet connection is really bad,so I need some kind of program to make a text file or something saying when internet connection is gone and time and date,also if possible to say why is it gone,is it my problem or is it my internet providers problem.
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Jun 3, 2011
I am writing a simple C program which has to find whether the system is connected to network/internet or not..
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Oct 24, 2010
In Ubuntu, How can you tell if your connection is being monitored? Have a home system, me and girlfriend are only users. Lately ALLl websites are taking longer to download. She claims her system and bank accounts were compromised. So am wondering if the connection is being monitored. Lots of tools for "windows" to help determine, but what about linux / ubuntu?
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Oct 29, 2014
freshly installed Debian-netinst, configured internet connection. Pinged Google - all transmitted packets were received, 0% loss.
Yet I am not sure if I have internet connection for what ever package I am trying to install using apt-get install package_name, I receive
E: Unable to locate package package_name
How can I check internet connection from CLI?
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Jan 24, 2011
So I just installed ubuntu from a net install, and updated from the internet and posted on this site through firefox while installing vlc wich just froze at 90%.....
but when I try to add community repos it comes up with errors. And while running a system check it says I have no internet connection...
I'm connected through ethernet on a router wich works with the g5 in the other room running osx, and the pc upstairs running ubuntu meerkat. Now I had this same problem with SUSE 11.1 and worked around it by adding through terminal but I was never able to add from the GUI.
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May 1, 2010
I had clicked on the upgrade notification in Update Manager. After 3 hours of downloading, it stopped abruptly. Now when I try, I get a message saying could not download, check internet connection. I am able to visit other sites, and am actually downloading the CD itself without any problem.
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Jan 9, 2011
I am running Ubuntu 10.10, and I would like to use my computer to share the internet connection from an ethernet port. For example, I would like to set up my computer as a wireless access point so I can create a network that other computers can connect to for internet.
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Jul 31, 2011
I just installed Ubuntu 11.04 but "whenever i try to download or install any software from 'Ubuntu software Center'it gives error: "Failed to download Package Files Check your internet Connection" Internet is working fine!I've also tried the command: "sudo apt-get update"
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Aug 8, 2010
I recently decided that I want to install mplayer on fedora 13. Problem is, everytime I try, a new problem arises. I've tried add/remove software, and it said "package download failed, check internet connection" which doesn't make sense because I'm connected to the internet and my connection is fine. So, then I tried yum install mplayer, that gave me an error.
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Jan 18, 2011
There is this active connection in firestarter: ec2-174-129-193-12.compute-1.amazonaws.com (Port 443 - Service HTTPS - program python)After doing ps aux | grep PID it shows: /usr/bin/python /usr/lib/ubuntuone-client/ubuntuone-syncdaemon...This comes up in the firewall in each login, how do I get rid of it and how did it get there in the first place? Another question is if there is a way to limit a program's access to the internet. For example KCalender.. The things I type up in there may be stored somewhere. How can I disable complete access to the internet for that program and any other program so they can't backup, share, check etc. ?
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Mar 3, 2011
I would like to know if there's a way of checking which program has new updates without internet connection?
Maybe like having a program to grab the currently available programs from a repo?
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Sep 6, 2010
I want to check what program is using some ports. I have
Code:
netstat -a | grep localhost
tcp 0 0 localhost:58935 localhost:www ESTABLISHED
tcp6 355 0 localhost:www localhost:58935 ESTABLISHED
udp 0 0 localhost:53888 localhost:53888 ESTABLISHED
I try ps aux | grep 53888. What other command can I use?
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Jan 24, 2010
Its a case of ".... wireless network connection active but still not internet connection .."I am using WEP - 128 key ... Works when I connect directly using ethernet cable ... but not wireless (pci and wireless router)
ubuadmin@ubucomputer:~$ ifconfig
wlan0 Link encap:Ethernet HWaddr 00:06:25:12:83:3b
inet addr:192.168.1.10 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::206:25ff:fe12:833b/64 Scope:Link[code].....
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Oct 21, 2010
I tried to install Xubuntu 10.10 Maverick as dual boot on my laptop. However when xubuntu is on, I can't find a way to connect to internet. When I try the 2 arrows on the up-right corner the option for wireless is deemed. I tried offline/online, that did not work either. when I click the firefox It says you are not connected.
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May 1, 2011
I seem to have is trying to get the internet to work. I can go to ..... ect but when I try to run playonlinux it says you do not seem to be connected to the internet, please post if you have anything useful, as I said I am very new to linux so be as detailed as possible.
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Aug 11, 2010
I have opensuse 11.1 Gnome on Lenovo S10e. I'm wanting to establish a mobile internet connection. I have tried so far...*UMTSMON but when I click on it nothing happens. I have reinstalled the program several times to no avail. *WINE to run the Optus program, however the program doesn't find the HUAWEI USB stick & *Via a Bluetooth connection (use mobile phone as a modem) didn't work either Anyhow, I have tried these and some other ways to get mobile to no avail.
Also, have gone to network connections-mobile broadband-add-configure it- but what am I forgetting to do? Need a path I can take to get mobile internet working. (I even have a direct SIM card slot in this laptop
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Jun 21, 2009
I have installed Fedora 11 recently. I want to share my Internet connection.
I have e LAN connection eth0 which is connected to internet.
I have a Wireless connection wlan0.
I want to share my internet connection with wireless connection.
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Feb 4, 2010
I have two linux laptops. Currently, I'm using both of them at work, side-by-side. Now the problem is, I'm connected to a wireless router, but the wireless only works on one of the laptops. So I'm stuck with one laptop that has no access to the internet. Both machines do, however, have working ethernet nic cards. So, I was wondering if I could use the laptop with the wireless connection to share the internet connection with my other linux machine and access the internet on both of them. Or as an alternative, just use the internet on the machine without wireless and be able to switch back and forth, that would increase my productivity like 30 fold.
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Sep 14, 2010
I have a email(postfix) installed on my centos, i think it is under some kind of attack, Is it possible that I can check who is connecting my server?
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Jun 7, 2010
I have a question regarding the configuration of Network Connection. My wired connection is fine right now and when I check the network connection applet, it display active information of eth0. However, when I click the Configure button, the Network Connection window appears but there's nothing in the Wired panel. Should there be a eth0 in that panel? I remember I had one before, but after I messed with some configuration of VPN, my network became unstable and I remove the Network Manager to try to solve the problem. Since then, there's nothing in my Network Connection window, though I can still connect to my router with eth0. Now even after I reinstalled the Network Manager, I still don't get anything.
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Oct 31, 2010
I have the "Work Offline" problem: when I boot up, the icon on the toolbar tells me I have "No network connection". This is not quite true, since I can access the first page of any website - only subsequent pages are inaccessible. I get a message saying that Firefox is offline. However, when I uncheck "Work Offline" in the File menu, it makes no difference to this behavior.
The problem is on my Ubuntu Dell desktop, which is connected to the internet with cable broadband via a D-Link router (wired connection). It has worked fine up till now. I use Ubuntu 10.04 and Firefox 3.6.11. I am writing this on my Ubuntu Dell laptop which is wired to the same router, so I assume the problem is not the router. I have tried various strategies suggested in threads on these forums, including editing about:config, changing "allow" to "deny" in some lines of /etc/dbus-1/system.d/NetworkManager.conf and changing from Automatic (DHCP) to Automatic (DHCP) Addresses only, but no luck so far. The contents of ifconfig are:
eth0
Link encap:Ethernet HWaddr 001:aa0:91:a7:51
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets: 0 errors: 0 dropped: 0 overruns: 0 carrier: 0
collisons: 0 txqueulen: 1000
RX bytes: 0 (0.0 B) TX bytes: 0 (0.0 B)
[Code]...
If I comment out "auto eth0" as well, it makes no difference. If I uncomment both lines ("auto eth0" and "iface eth0 inet dhcp") then I lose the internet connection altogether.
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Jan 5, 2010
I want a program (shell script) to be executed as soon as my DHCP connection is established successfully. Is there any way I can do this ?
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Jul 4, 2011
I have 11.04 with Classic Gnome desktop working fine including wireless network connection:Any pointers on how I can get the network connection functioning in the Xmonad session would be appreciated - e.g. what program handles the setup and bring down the wireless connection?
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Jun 1, 2011
I just installed Ubuntu 11.04 desktop on my desktop in dual boot with Windows 7.
Heres my problem, I am unable to connect to the Internet even though my wired Ethernet connection says it is connected normally. The wierd thing about this is that I also have a wireless card in my desktop and when I connect through that I am able to connect to the Internet. I am connecting to a router that is functioning as a repeater to my main router/cable modem. I have tried to solve this myself but am having no luck. Ironically, earlier today suddenly my ethernet connection worked for a few minutes without me modifying anything.
The output of some terminal commands are below.
Quote:
Quote:
Quote:
However a pint to that ip address (my router) is successful.
Quote:
Hosts.allow and hosts.deny are both fine (not blank but no entries)
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Oct 29, 2010
my iptables Policy is Drop..my server ports is open just for httpd,ssh .Is there any rule which can allow all connection from a specific program for ex. i want to scan an ip Address ports.as you know nmap connect to every known port to see if that is open or not so, if i want to allow nmap to connect, i need to include all ports for that, or i can allow connection from localhost to outside in all ports .my server is very secure . i dont want other programs (probably a backdoor) use those ports to connect outside i want to know is there any ability in iptables which can rule connections by name of program like "Allow any Connection from /usr/bin/nmap to everywhere " ?
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Mar 29, 2011
I need a program that will limit download speed per connection. So that each download is limited to 100kbit/s for e,g. I tried trickled, it only limits whole application (and doesn't work with firefox). Also tried pyshaper, doesn't work. Is there such software?
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Jul 8, 2010
I'm using ubuntu 10.04 dual boot with windows xp. Recently I'm having problems using the internet, I can connect to our wireless network but can't use the internet, firefox just says error on opening the page. But when im in windows xp i can surf and use the net. Is their a way to diagnose whats causing the problem. I use a Realtek RTL8187 wireless lan, it works fine before its just now that its not working with ubuntu.
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Jan 11, 2011
I installed ubuntu 10.10 with windows 7 (dual boot) in my fujitsu lifebook. I use zoom ultra by Sentar EVDO MODEM ST880U. I tried pppoeconf or DSL or mobile broadband but fail to connecte internet. In first exprience on ubuntu 9.04 same via dell latitude with Huawei EC123 Data card.Any one can assist me to overcome the bad condition to like ubuntu as on offline mood in my work zone.Actually i used ubuntu 9.04 for my offline work in Dell. Now also same condition starts. Please help to come internet and enjoy ubuntu.
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Jun 17, 2011
OS is Ubuntu 10.04. I have HomePNA-connection which is converted to Ethernet by Netsys NH-300 HomePNA-Ethernet adapter.
The problems that I have: Sometimes when I boot I don't get IP from DHCP. If try to ping any address I am told that host is unreachable. Sometimes this I can get IP by using command dhlient -r and dhclient to request new ip. Sometimes only way to get my connection to work is booting the computer.
Sometimes the connection works fine from the start but disconnects later for short time. Sometimes this happens every ten minutes, sometimes less often. If I wait for a while the connection might start working again, if not dhclient -r or reboot helps usually. But not always.
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