Re: Secure opening of ports

[Sam Watkins <swatkins@fastmail.fm>]

On Mon, Jan 24, 2005 at 10:55:15PM +0200, David Baron wrote:
> 1. From an outside machine, say using openSSH, how do I configure to do this 
> sequence and open my home machine's SSH port?

I suppose you could would write a shell script to do the knocking with
netcat </dev/null.  If you're knocking from a windows box, you could use
unxutils or something.

I have no idea if there is a better way to do this.

> 2. How might I keep a secure SMTP port available when needed but hidden 
> otherwise using knockd's 2nd example? or the brief periodic opening I first 
> proposed? Other?

I don't know, sorry.