On 2018-10-24 07:24, Timothy Metzinger wrote:
There's no security in obscurity. Automated port scanners will sweep your system in a couple of seconds.
There is *limited* security in obscurity but it's a valid layer. Obviously insufficient as an only layer...
As a trivial example, I get orders of magnitude more ESMTP authentication attempts against well known/standardized ports 25 and 587 than non-standard ports that speak the exact same protocol. Last I looked, 25 receives substantially more traffic than 587 despite 587 being the better choice to attack these days.
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