tcpdmatch

Description: tcpdmatch is a diagnostic tool that interactively demonstrates the access control rules you've specified.

Security Relevance: Sometimes when you establish tcpd access control rules, even though your entries aren't flawed, the logic behind them is. To avoid this, use tcpdmatch to verify your rules and logic. tcpdmatch will interactively predict how tcpd will handle a given connection request. By examining the output, you can determine whether your rules actually accomplish your desired end. For more information, see Chapter 18, "Linux and Firewalls." For information on tcpd access control, please see tcpd, hosts_access, hosts_options, and tcpdchk in this appendix.