Subj : Rejecting an incoming connection
To   : Paul Hayton
From : Alexey Fayans
Date : Thu May 20 2021 12:14 pm

Hello Paul!

On Thu, 20 May 2021 at 19:59 +1200, you wrote to All:

 PH> Also of note, setting such a block up is not my preferred choice but I
 PH> have exhausted options to contact the unknown sysop and want to ensure
 PH> the test AKA is available for others to send/recieve packets from
 PH> also...  with a polling frequency of 2 mins the offending system gives
 PH> no one else a look in.

If your system can suffer from DoS because of a single person making single connection once in 2 minutes, imagine what happens, if someone will poll your system from a small botnet (like 100 servers) via random proxies making 10-100 connections per second each. Just for fun.

By the way, binkd can handle multiple connections simultaneously, so I can't really imagine how a single node can cause DoS by polling your system every 2 minutes.


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