TCPDMATCH(8) System Manager's Manual TCPDMATCH(8)
NAME
tcpdmatch - tcp wrapper oracle
SYNOPSIS
tcpdmatch [-d] [-i inet_conf] daemon client
tcpdmatch [-d] [-i inet_conf] daemon[@server] [user@]client
DESCRIPTION
tcpdmatch predicts how the tcp wrapper would handle a specific request
for service. Examples are given below.
The program examines the tcpd 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
network configuration file.
When tcpdmatch finds a match in the access control tables, it identi-
fies the matched rule. In addition, it displays the optional shell com-
mands or options in a pretty-printed format; this makes it easier for
you to spot any discrepancies between what you want and what the pro-
gram understands.
ARGUMENTS
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
`paranoid´ wildcard patterns.
When a client host name is specified, tcpdmatch gives a predic-
tion for each address listed for that client.
When a client address is specified, tcpdmatch predicts what tcpd
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
`paranoid´ wildcard patterns. The default server name is `un-
known´.
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´.
OPTIONS
-d Examine hosts.allow and hosts.deny files in the current direc-
tory instead of the default ones.
-i inet_conf
Specify this option when tcpdmatch is unable to find your in-
etd.conf network configuration file, or when you suspect that
the program uses the wrong one.
EXAMPLES
To predict how tcpd would handle a telnet request from the local sys-
tem:
tcpdmatch in.telnetd localhost
The same request, pretending that hostname lookup failed:
tcpdmatch in.telnetd 127.0.0.1
To predict what tcpd would do when the client name does not match the
client address:
tcpdmatch in.telnetd paranoid
On some systems, daemon names have no `in.´ prefix, or tcpdmatch may
need some help to locate the inetd configuration file.
FILES
The default locations of the tcpd access control tables are:
/etc/hosts.allow
/etc/hosts.deny
SEE ALSO
tcpdchk(8), tcpd configuration checker
hosts_access(5), format of the tcpd access control tables.
hosts_options(5), format of the language extensions.
inetd.conf(5), format of the inetd control file.
AUTHORS
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
TCPDMATCH(8)
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