Slowly but surely IPv4 kee ... / 2013-12-17

2013-12-17 Slowly but surely IPv4 kee ...
Slowly but surely IPv4 keeps trying authenticated smtp on one server. The connection is kept open and there is 4 minutes between each attempt, probably to avoid detection. Searching for the IPv4 address gives multiple sites listing it for smtp auth attempts.

And the server doesn't need username/password based smtp authentication anyway, so I disabled all the mechanisms. In format:
define(`confAUTH_MECHANISMS', `')dnl

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IPv6 check

Running test...
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