Updated vsftpd packages that re-enable tcp_wrappers support are available for Red Hat Linux 9.
In Red Hat Linux 9, the vsftpd FTP daemon switched from being run by xinetd to being run as a standalone service. In doing so, it was accidentally not compiled against tcp_wrappers. Users of vsftpd who make use of tcp_wrappers features are advised to upgrade to these errata packages. This issue only affects Red Hat Linux 9 boxed sets manufactured for distribution within the United States. The part numbers, which can be found on the bottom flap of the box, are RHF0120US and RHF0121US. Copies of Red Hat Linux 9 obtained through other means (such as from Red Hat Network, FTP, or international boxed sets) already contain the packages referenced by this erratum, and are not vulnerable to this issue.