• Yep, there is one though it's not available in most Linuxes out of the box:

  https://douaneapp.com/

• You could also check firejail which allows to specify network restrictions: https://firejail.wordpress.com/documentation-2/basic-usage/#networking

• OpenSnitch is a GNU/Linux application firewall:

  https://github.com/evilsocket/opensnitch

• Douane personal firewall for GNU/Linux:

  https://douaneapp.com/

• You could also check firejail which allows to specify network restrictions: https://firejail.wordpress.com/documentation-2/basic-usage/#networking

Yep, there is one though it's not available in most Linuxes out of the box:

https://douaneapp.com/

• Yep, there is one though it's not available in most Linuxes out of the box:

  https://douaneapp.com/

• You could also check firejail which allows to specify network restrictions: https://firejail.wordpress.com/documentation-2/basic-usage/#networking