Lindsay Haisley writes:
> 3: Patch doesn't support IPv6. Which reminds me that I need to write > some code to fix other IPv6 handling deficiencies with smtpaccess.That's very true. A couple of points on this, as regards ratelimit.py. Courier on my servers is IPv6 enabled, and addresses are posted to the log in the form "::ffff:a.b.c.d", a hybrid notation which I think is deprecated at this point, although it works.
RFC 4291 documents this notation in section 2.2; it's from 2006. Section 2.2 is also referenced from RFC 6052, in 2010.
What's deprecated is the "IPv4-compatible IPv6 address", represented as ::a.b.c.d, this is referenced in RFC 4291 as well.
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