Large amounts of sent data during inactivity

Kernels & Hardware, configuring network, installing services

Large amounts of sent data during inactivity

Postby foos » 2020-05-14 11:30

I recently installed Debian onto my laptop and have been using it for regular use. I've installed NordVPN for as my VPN. However, I'm noticing that if I leave the laptop running overnight, it's sending unreasonable amounts of data out (~15GB+ noted when running nordvpn status).

I'm wondering what all I should do to troubleshoot and find out the leak. I'm quite new to Linux in general, so I'm not sure where to start.
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Re: Large amounts of sent data during inactivity

Postby Hallvor » 2020-05-14 11:42

How about the application nethogs?
Lenovo ThinkPad T440S, Intel Core i7-4600U CPU @ 2.10GHz, 8 GB RAM, 256 GB SSD, Debian Buster (KDE)
Lenovo ThinkPad X240, Intel Core i5-4300U CPU @ 2.90GHz, 8 GB RAM, 120 GB SSD, Debian Buster (KDE)
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Re: Large amounts of sent data during inactivity

Postby foos » 2020-05-14 13:12

So good(?) news. The leak has something to do with waking up from a suspended state. I did try using nethogs, and everything seemed normal. I let the computer go into sleep mode for roughly an hour. When I resumed use, I did not have the ability to browse the internet. Nethogs wasn't updating with any network traffic. But running 'nordvpn status' every 5 seconds had the data sent climbing by 100+MB/s. I don't think this data was actually being sent.

So I think there is just a bug with nordvpn and waking up from a suspended session. I'll send my question to their team. If I get any information back I'll be sure to add it to this thread.
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Re: Large amounts of sent data during inactivity

Postby arzgi » 2020-05-14 15:38

You could test it easily by removing nordvpn.

Did not find nordvpn in Buster repos, there is also other vpn solutions that might work better.
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