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RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD Others

TCPDMATCH(8)            OpenBSD System Manager's Manual           TCPDMATCH(8)

     tcpdmatch - tcp wrapper oracle

     tcpdmatch [-d] [-i inet_conf] daemon client

     tcpdmatch [-d] [-i inet_conf] daemon [@server] [user@] client

     tcpdmatch predicts how the tcp wrapper would handle a specific request
     for service.  Examples are given below.

     The program examines the tcpd(8) access control tables (default
     /etc/hosts.allow and /etc/hosts.deny) and prints its conclusion.  For
     maximal accuracy, it extracts additional information from your inetd(8)
     network configuration file.

     When tcpdmatch finds a match in the access control tables, it identifies
     the matched rule.  In addition, it displays the optional shell commands
     or options in a pretty-printed format; this makes it easier for you to
     spot any discrepancies between what you want and what the program under-

     The following two arguments are always required:

     daemon  A daemon process name. Typically, the last component of a daemon
             executable pathname.
     client  A host name or network address, or one of the `unknown' or `para-
             noid' wildcard patterns.

     When a client host name is specified, tcpdmatch gives a prediction for
     each address listed for that client.

     When a client address is specified, tcpdmatch predicts what tcpd(8) would
     do when client name lookup fails.

     Optional information specified with the daemon@server form:

     server  A host name or network address, or one of the `unknown' or `para-
             noid' wildcard patterns.  The default server name is `unknown'.

     Optional information specified with the user@client form:

     user    A client user identifier. Typically, a login name or a numeric
             userid.  The default user name is `unknown'.

     -d            Examine hosts.allow and hosts.deny files in the current di-
                   rectory instead of the default ones.

     -i inet_conf  Specify this option when tcpdmatch is unable to find your
                   inetd.conf network configuration file, or when you wish to
                   test with a non-default one.

     To predict how tcpd(8) would handle a telnet request from the local sys-

           tcpdmatch telnetd localhost

     The same request, pretending that hostname lookup failed:

           tcpdmatch telnetd

     To predict what tcpd(8) would do when the client name does not match the
     client address:

           tcpdmatch telnetd paranoid

     The default locations of the tcpd(8) access control tables are:

     /etc/hosts.allow  Access control table (allow list)
     /etc/hosts.deny   Access control table (deny list)

     hosts_access(5),  hosts_options(5),  inetd.conf(5),  tcpdchk(8).

           Wietse Venema (wietse@wzv.win.tue.nl),
           Department of Mathematics and Computing Science,
           Eindhoven University of Technology
           Den Dolech 2, P.O. Box 513,
           5600 MB Eindhoven, The Netherlands

OpenBSD 2.3                      June 23, 1997                               2

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
OpenBSD sources for tcpdmatch(8)

[Overview Topics]

Up to: Communication Filtering and Firewalls - Preventing certain types of communication. Communication security, encryption, et al. -

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