Does Port Knocking Really Help?
It’s great, I have a home computer that I use as a server. I can get to it from any where in the world. Since I’m using Dyndns.org and a couple work arounds I host my own web site on it, eventually I hope to move this blog to it as well. It works great for manual back ups, running extra software, a second desktop, online photo album, and of course the on-line web site. However, I’m concerned with security. I usually log in via ssh and I’ve noticed lately, according to the server logs, that people are trying to brute force attack the server. Fortunately user names and passwords are more than secure, but I’m still bothered by it. That’s where “port knocking” comes in. A program monitors your ports and looks for a specific pattern. When that specific pattern is used the ssh port is opened for a short period. This seems to solve the problem, or does it?
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