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Hi Arnaud,

There are a few reason you might see this traffic.

One reason could be that your computer does initiate a TCP connection to 151.139.128.14 when it is plugged in and you are capturing FIN/ACK because the connection is now being closed. (timeout?)

Now, if this happens every time then look into capturing traffic to and from 151.139.128.14 over a longer period. This is to allow you to capture the TCP connection being initiated by the computer. TCP connection may be long lived so it may have been established when the computer was plugged and "held" by the remote host when you unplugged your computer. (Try leaving the cable plugged when you power down so that your TCP/IP stack has time to close all connections before signin off. Only when it's off do you want to unplug the cable.)

Another reason is that it is possible your residential gateway has your computer setup in a DMZ. This would allow pretty much any Internet host to send you traffic of any kind directly.

Hope this helps.

Cheers,

JFD

Hi Arnaud,

There are a few reason reasons you might see this traffic.

One reason could be that your computer does initiate a TCP connection to 151.139.128.14 when it is plugged in and you are capturing FIN/ACK because the connection is now being closed. (timeout?)

Now, if this happens every time time then look into capturing traffic to and from 151.139.128.14 over a longer period. This is to allow you to capture the TCP connection being initiated by the computer. TCP connection may be long lived long-lived so it may have been established when the computer was plugged and "held" by the remote host when you unplugged your computer. (Try leaving the cable plugged when you power down so that your TCP/IP stack has time to close all connections before signin signing off. Only when it's off do you want to unplug the cable.)

Another reason is that it is possible your residential gateway has your computer setup in a DMZ. This would allow pretty much any Internet host to send you traffic of any kind directly.

Hope this helps.

Cheers,

JFD