[86769] in North American Network Operators' Group
Re: a record?
daemon@ATHENA.MIT.EDU (Suresh Ramasubramanian)
Wed Nov 16 10:55:59 2005
Date: Wed, 16 Nov 2005 21:25:27 +0530
From: Suresh Ramasubramanian <ops.lists@gmail.com>
To: Patrick Lynchehaun <plynchehaun@servecentric.com>
Cc: nanog@merit.edu
In-Reply-To: <45D2F9A714EB5C42B250FD3A2523DD860412D0@ex-2003.centric.local>
Errors-To: owner-nanog@merit.edu
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 th=
is
> ip. If you want to close it again you can telnet back in on another assig=
ned
> port say 5501, thus closing ssh port to that ip.
>
Yup. AKA "port knocking" which I think someone did mention upthread
