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The try-from utility identifies the detailed information regarding to a connection. This utility must be called via a remote shell command to determine if the host name and the address are recognized properly, and also if the user name lookup works.
The try-from utility can be executed from the command line as follows:
When the try-from utility is invoked, it prints the following output:
The client information describes how the remote host recognizes the client in terms of an address, name, and user name, whereas, the server information describes the remote host.
For more information on % <letter> expressions, type man 5 hosts_access at the prompt.
try-from - test program for the tcp_wrapper
try-fromThe 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.
rsh host /some/where/try-from
See alsohosts_access(5), hosts_options(5), tcpd(8)
Wietse Venema, Eindhoven University of Technology, The Netherlands.
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