16 Nov
2005
16 Nov
'05
10:55 a.m.
On 11/16/05, Patrick Lynchehaun <plynchehaun@servecentric.com> wrote:
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.
Yup. AKA "port knocking" which I think someone did mention upthread