a record?

Wed Nov 16 12:52:36 UTC 2005

> In Iptables you can keep port 22 closed until needed, opening it first by telneting to a higher port say 5500 and Iptables just giving access to this ip. If you want to close it again you can telnet back in on another assigned port say 5501, thus closing ssh port to that ip.
> 
> 
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -m recent --rcheck --name SSH -j ACCEPT
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5500 -m recent --name SSH --set -j DROP
> -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 5501 -m recent --name SSH --remove -j DROP
> 
> Thanks,
>       Patrick.
> 
> >> Moving sshd from port 22 to port 137, 138 or 139. Nasty eh?
> >
> >don't do that! Lots of (access) isps around the world (esp here in
> >Europe) block those ports
> 
> If you're going to move sshd somewhere else, port 443 is a fine
> choice.  Rarely blocked, rarely probed by ssh kiddies.  It's probed
> all the time by malicious web spiders, but since you're not a web
> server, you don't care.
> 
> R's,
> John

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