Based on our record, Covid-19 Controls should be more popular than netfilter. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
The netfilter subsystem handles this, it's part of the Linux Kernel and part of all linux distros that don't use a custom kernel. You can read more about it here. Source: about 3 years ago
One of the only places you can't arrive as an unvaccinated US citizen right now. Https://covidcontrols.co. Source: over 2 years ago
Https://covidcontrols.co look at has good info on restrictions. Source: almost 3 years ago
Covidcontrols.co has relatively up to date info. Source: almost 3 years ago
Murus Firewall - Murus is a frontend for the OS X PF network firewall.
TripsGuard - COVID19 travel restrictions worldwide
Gufw - Gufw is an easy, intuitive way to manage your Linux firewall.
Visa List - Know where you can travel with your passport tension free ✈️
Little Snitch - Little Snitch is a firewall application that monitors and controls outbound internet traffic.
Covid Entry Check - Check the Covid-19 restrictions on your travel route