Imagine how long it would take to scan every port between 1 and 65535 on million... | Hacker News

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crdoconnor on March 4, 2013 | parent | context | favorite | on: How I spend my first 5 minutes on a server

Imagine how long it would take to scan every port between 1 and 65535 on millions of machines.

Versus how long it would take to just try port 22 on millions of machines.

It wouldn't stop a determined hacker for more than a few minutes, but it will reduce the number of automated attacks on ssh essentially to zero.

stinos on March 4, 2013 [–]

this. Everytime I check my logs there's tons of failed tries to port 22 yet none to the port ssh actually runs on. Which keeps the log with failed logins clean.

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