man try-from (Administration système) - test program for the tcp_wrapper
NAME
try-from - test program for the tcp_wrapper
SYNOPSIS
try-from
DESCRIPTION
The try-from command can be called via a remote shell command to find out if the hostname and address are properly recognized by the tcp_wrapper library, if username lookup works, and (SysV only) if the TLI on top of IP heuristics work. Diagnostics are reported through syslog(3) and redirected to stderr.
Example:
rsh host /some/where/try-from
SEE ALSO
hosts_access(5), hosts_options(5), tcpd(8)
AUTHOR
Wietse Venema, Eindhoven University of Technology, The Netherlands.