The number of times I've seen people shitting all over port knocking is truly confusing. Since we added it several years ago, we've not had a single case of hackers trying to break into sshd. Before port knocking, 100's a day, even though it was on a very unusual port.
I try to tell people this, when they poo poo port knocking, but they just don't get it.
I try to tell people this, when they poo poo port knocking, but they just don't get it.
EDIT: s/the/they/