Security through obscurity is a very valid way to secure something. It shouldn’t be the only way of securing something, but it can be a valid additional layer.
The knock sequence is a secret, just like a password. It may not be a particularly strong secret, but is is strong enough to keep out casual attackers. You’ll still need additional security, but sshd is well equipped to provide that.
I’m not confident it is a Russian op, but Russia has always fueled both sides of the political spectrum. They don’t necessarily want one side to prevail, they just want their opponents to be divided.
While the plastic gadgets are wasteful, they don’t hold a candle to all the unnecessary food packaging that’s used. Just tear apart one of your garbage bags, and see how much is food-related packaging and how much is gadgets.
I visited the US (WV) recently, and I was
appalled by how much waste goes unrecycled. At home (Europe) our family produces one bag of unrecycled waste every 2 weeks, in WV we produced 6 bags in 2 weeks, and that’s while living in European style (refillable water bottles, declining plastic bags for groceries, buying unpackaged produce, etc.).
Security through obscurity is a very valid way to secure something. It shouldn’t be the only way of securing something, but it can be a valid additional layer.
The knock sequence is a secret, just like a password. It may not be a particularly strong secret, but is is strong enough to keep out casual attackers. You’ll still need additional security, but sshd is well equipped to provide that.