Run p0f on workstation. Connect to workstation's SMTP port from some machine elsewhere... see no output from p0f. Connect to workstation's IPv4 address by number instead of by name... see p0f report the connection.
How would you suggest this be fixed? Upstream has no ipv6 support at all. I suppose I could ask them about it... I'm accepting patches if you can add ipv6 support... ;)
Personally, I feel that's the job of the Fedora maintainer of the package in question.
In reply to comment #2: To contact the maintainer? Surely. I have done so... will let you know what he says. To code enhancements to software that someone is simply packaging from upstream? If time and interest permits, great, but I don't think it's a requirement that package maintainers do so.
I meant the latter. Fedora is a fully IPv6-capable distribution, and it is the responsibility of the package maintainer to ensure that packages meet the standards we expect. I think the concept of 'simply packaging' should be discouraged.
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