How to permanently change TTL on macOS Catalina?

network catalina

The classic method with /etc/sysctl.conf still works for macOS Catalina, but only after disabling SIP since El Capitan.

Related

Performance hit to gaming using Parallels Desktop for Mac
Any way to export multiple playlists to m3u at once?
What makes Catalina make a shell script quarantined?
Avoid default fullscreen (no header, no dock)
Restricting/Blocking iPhone access with a passcode for workers?
Swollen battery for the past few days - MacBook Pro (Retina, 15-inch, Mid 2015)
Where do I put a custom ringtone for Facetime? (macos Sierra)
2FA codes not received on Messages in macOS
Preview document history
In MacOS Catalina 10.15 on Safari, How do you disable Command-I from composing a new Mail message?
Is there any way to automate the deployment of refurbished apple products?
Messages open automatically at random times on Macbook Air