North American Network Operators Group

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Re: a record?

  • From: Suresh Ramasubramanian
  • Date: Wed Nov 16 10:56:38 2005
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On 11/16/05, Patrick Lynchehaun <[email protected]> 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