Theodore Baschak

BOFH. Open Source Guru. Founder/Operator of Hextet Systems, AS395089 and Network Architect for Daemon Defense Systems, AS55101.

Interesting Point Re: IPv6 Greylisting

Tue, 15 Jan 2013 22:22:00 -0600 » Security, Networking, IPv6, System Administration

I was browsing some of the IPv6 related blog posts on, and I came across this interesting one regarding greylisting.

Because of “happy eyes” a connection that immediately fails on IPv6 will fail over to IPv4, so if greylisting is used only on IPv6 it will not be as effective as planned.

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