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two processes of the same VPN connection #50

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yura-mdj opened this issue May 10, 2022 · 1 comment

yura-mdj commented May 10, 2022

Hi all

When a client connects to sstpd, two processes of the same VPN connection are created in Linux

Is that how it should be?

Contributor

tisj commented May 3, 2024

This is expected because of the notty option/argument to pppd, which creates an additional child process:

notty
Normally, pppd requires a terminal device. With this option, pppd will allocate itself a pseudo-tty master/slave pair and use the slave as its terminal device. Pppd will create a child process to act as a 'character shunt' to transfer characters between the pseudo-tty master and its standard input and output.

If you use the tree option to ps (-f) you would visually see that pid 32489 it is a sub-process of 32488.

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