Description

This article is from the comp.security.unix and comp.security.misc FAQ, by Alan J Rosenthal flaps@dgp.toronto.edu with numerous contributions by others.

15 Tcp wrappers (tcpd) thinks all hosts are 0.0.0.0 in Solaris 8 or in some versions of AIX.

This is because the line for that service in inetd.conf still says "tcp6".
The vendor-supplied application you are wrapping can handle IPv6 (aka
"IP-NG") connections, but the version of tcp wrappers you are using cannot.
Change "tcp6" to "tcp" on inetd.conf lines which you edit to invoke the
standard version of tcp wrappers.

For ftpd for AIX, I've heard that you then need to add the '-f' option to
the ftpd invocation. (Confirmation requested.)

Alternatively, use a "IPv6-aware" version of tcp wrappers from
ftp://ftp.porcupine.org/pub/ipv6/

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