I am trying to diagnose a network problem and noticed that my computer is communicating with an IP address that I'd like to understand.  First, all apps on the desktop were closed so the only thing I have open is my terminal window which is doing nothing but running wireshark.  The computer continuously is communicating with Google at 35.224.99.156 and it says connectivity-check.unbuntu.com.  But a whois on the ip shows Google as the owner.  On a side note:  My router keeps pinging my computer over and over again.  Is that normal?
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I just installed Ubuntu 18.04 and going through all my dotfile-scripts to properly configure Ubuntu automatically as much as possible. Looping through gsettings I was able to configure most settings as I want them but I haven't found anything in gsettings related to "Connectivity Checking" which is new in Ubuntu 18.04 LTS (at least not included in 16.04 LTS).  I can turn off Connectivity Checking through Settings -&gt; Privacy but how can I do this programmatically? Just uninstall network-manager-config-connectivity-ubuntu? I was able to turn off other privacy settings through gsettings.  Viewing the file list of this package at  indicates that there is just one settings file (/usr/lib/NetworkManager/conf.d/20-connectivity-ubuntu.conf) but it does not show any possibility to enable/disable the feature.  Any help is appreciated.
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If I want to find out how the hostname of a remote linux machine on my LAN is, how can I achieve this given I don't have access via SSH etc.?  Probably depends if linux is part of a WINS domain I suppose.
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When I type mynewdomain.com into my browser I believe the following happens.   My computer sends a request to my ISP's name servers to find the IP address of mynewdomain.com My ISP name server sends a request to the "." name server. The "." sends a response back to the ISP name server, saying try using the com. nameserver. My ISP name server sends a request to the com. nameserver. The com. nameserver finds mynewdomain.com. and sends my ISP nameserver back the A record. My ISP nameserver sends this back to my computer.    My question is about step 5. How does mynewdomain.com. get into the list on the com. nameserver? And given that there are hundreds of millions of registered .coms, how does it find mine in such a short time?
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I'm trying to write a simple script to monitor my network status, without all of ping's output:  ping -q -c 1 google.com &gt; /dev/null &amp;&amp; echo online || echo offline   The problem is that when I'm not connected, I'm still getting an error message in my output:  ping: unknown host google.com offline   How can I keep this error message out of my output?
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I'm new to Linux (currently running Ubuntu 10.04) and I have just finished setting up SSH access to my Linux Machine.  Currently, I have to use ssh root@x.x.x.x to connect but would much rather be able to swap the IP for the computer name (like in Windows with \\name) or a domain name (like computername.example.com). I don't really know where to start so any help would be most appreciated.  Please go slowly, as mentioned - I am still new to this.  EDIT 1 Completely forgot to mention that I am trying to connect from Windows 7 (via PuTTY) - sorry.
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When I attempt to ping google's dns or any outside the network I get  connect: Network is unreachable?  I can't update either which I put down to this  I am new to networking... And Ubuntu. But these are results of some commands I thought might help  $ ip a 1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo     inet6 ::1/128 scope host         valid_lft forever preferred_lft forever 2: eth0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc mq state UP qlen 1000     link/ether 00:0e:7f:a9:10:54 brd ff:ff:ff:ff:ff:ff     inet 192.168.0.5/24 brd 192.168.0.255 scope global eth0     inet6 fe80::20e:7fff:fea9:1054/64 scope link         valid_lft forever preferred_lft forever 3: virbr0: &lt;NO-CARRIER,BROADCAST,MULTICAST,UP&gt; mtu 1500 qdisc noqueue state DOWN      link/ether 86:0b:cb:43:63:a5 brd ff:ff:ff:ff:ff:ff     inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0 mcserver@helloworld:~$   $ vi /etc/resolv.conf: # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) #     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 192.168.0.5 nameserver 8.8.8.8  $ vi /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback  # The primary network interface auto eth0 iface eth0 inet static         address 192.168.0.5         netmask 255.255.255.0         network 192.168.1.0         broadcast 192.168.0.255         post-up iptables-restore &lt; /etc/iptables.up.rules         dns-nameservers 192.168.0.5 8.8.8.
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Server has numerous IP addresses, set up on it's network interface.  How to find, who is listening to specific IP port 80?  netstat shows very long list. Are there any builtin means?  UPDATE  Also can't use findstr with also wishing to know process name because brocess name is displayed on separate line.
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There's two servers with the same network IP, and the only difference between them is the last two numbers like: 37.211.15.247 and 37.211.166.178. The Hosting Provider claims that the subnet mask for both networks is 255.254.0.0  When I try the command Tracert (Traceroute) to test the ping and to see what hops does it take to reach the destination server, I get different ping times and different forward path results which is strange because they are all located in the same company host.  Is there something wrong? Shouldn’t it take the same path too?  I have added the the full IP addresses to both servers as requested by some commenters. Well the two servers aren’t “International” anyways, so as far as I know, the only thing that comes to mind is the possibility that the two are configured on different subnetworks just like what . Though it’s suspicious.  UPDATE: After doing so much research, I found out the Subnet of these two hosts. They are on a /15 (255.254.0.0) subnet mask. Unfortunately, this is what that hosting provider claimed to me which is not true, and the true Subnet they apparently use is a /17 (255.255.128.0) Subnet mask. It turns out that they were definitely on different Subnets. That's why I got different traceroutes when I tested these two IPs 37.211.15.247 and 37.211.166.178  because they are clearly on different Subnets. Thank you everyone for these good answers, especially  his answer helped me a lot.
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Is it possible to catch, which program is accessing a specific IP address?   I found my computer is flooding and wish to check addresses one by one.  May be it is possible to set up some audit for this?
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I want to map the IP address 192.168.1.222 to 127.0.0.1 so that if I use 192.168.1.222 in the web browser or ping command I get the response (and that from my 127.0.0.1).   Is this possible via routing tables or do I have to add some sort of virtual network adapter?   I try to deal with this problem on a Windows 7 machine and have no other options than a Windows XP maybe.  I'm stuck right there.
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Using VirtualBox.  There's two Virtual Machines, Ubuntu 10.04 and Windows 7.  On Ubuntu:  There's two ethernet interfaces.   Bridge interface (eth0) who can access the internet. ping www.google.com works ok. NAT interface (eth1) configured as Internal Network who have ip 10.0.0.101, netmask 255.255.255.0 and gateway 10.0.0.1 who can ping Windows 7 in 10.0.0.102.   On Windows   A interface who have ip 10.0.0.102 and can ping Linux in 10.0.0.101 ok, but can't ping www.google.com.   So, how can I configure Windows to have access to the internet using my Linux machine?
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This seems a bit odd. Using netstat -a -b -n I've found the following:  TCP 192.168.1.X:1150   157.56.124.76:443 ESTABLISHED [Explorer.EXE]   It turns out that the ip 157.56.124.76 which resolves to db3wns2011017.wns.windows.com is a static ip from .  Moreover, using tcpView from  I can see that it's a TCP connection over https.  I tried closing the connection and after a second it was back on. Initially a kb of data was sent and nothing after that..  What is this all about and why is it Established?  I have windows 8.1 enterprise. I don't have OneDrive or any other microsoft cloud stuff installed. This is persistent, and is there after booting.  update  After finding out that this is related to Windows Push Notifications, I followed the steps  to disable such notifications, but the connection remains.
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I try with netstat -ab -p tcp -n and among the results get:    TCP    0.0.0.0:47001          0.0.0.0:0              LISTENING Can not obtain ownership information   I am running as administrator and get that message. I also downloaded a utility to show network activity for exe's but nothing open is listening on port 47001 according to the utility.  How can I find out what is listening?
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When I wake my Mac mini from sleep, it occasionally comes up with a dialog saying "The name of your computer "whatever" is already in use on this network. The name has been changed to "whatever (1)"" (or (2), I'm up to (4) at the moment).  The Mac is plugged in to the network via an ethernet cable and gets a DHCP assigned IP address from my router which runs pfSense. I have DHCP set to give the same IP address to the Mac's Mac.  Why does this happen, and more usefully, how can I make the machine stop renaming itself?  In System Preferences - Sharing I have 'File sharing' and 'Remote Login' enabled.
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I'm looking for a way to monitor my current internet connection quality by showing the ping-response to a website like google in the taskbar on the right side. I'm using Windows 8.1. Kind of like , but for the ping. Any suggestions?  I want to stop using the command line to ping Google.
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I need to know the ip address of another machine in a lan network.  What is the Windows command for getting ip address from machine name and vice versa?
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I'm using Ubuntu 13.04.  Wireshark won't show me any logs, won't function at all. I'm connected to my WiFi,  Belkin router.