TCPDCHK(8)TCPDCHK(8)NAMEtcpdchk - tcp wrapper configuration checker
SYNOPSYStcpdchk [-a] [-d] [-i inet_conf] [-v]
DESCRIPTIONtcpdchk examines your tcp wrapper configuration and
reports all potential and real problems it can find. The
program examines the tcpd access control files (by
default, these are /etc/hosts.allow and /etc/hosts.deny),
and compares the entries in these files against entries in
the inetd or tlid network configuration files.
tcpdchk reports problems such as non-existent pathnames;
services that appear in tcpd access control rules, but are
not controlled by tcpd; services that should not be
wrapped; non-existent host names or non-internet address
forms; occurrences of host aliases instead of official
host names; hosts with a name/address conflict; inappro
priate use of wildcard patterns; inappropriate use of NIS
netgroups or references to non-existent NIS netgroups;
references to non-existent options; invalid arguments to
options; and so on.
Where possible, tcpdchk provides a helpful suggestion to
fix the problem.
OPTIONS-a Report access control rules that permit access
without an explicit ALLOW keyword. This applies
only when the extended access control language is
enabled (build with -DPROCESS_OPTIONS).
-d Examine hosts.allow and hosts.deny files in the
current directory instead of the default ones.
-i inet_conf
Specify this option when tcpdchk is unable to find
your inetd.conf or tlid.conf network configuration
file, or when you suspect that the program uses the
wrong one.
-v Display the contents of each access control rule.
Daemon lists, client lists, shell commands and
options are shown in a pretty-printed format; this
makes it easier for you to spot any discrepancies
between what you want and what the program under
stands.
FILES
The default locations of the tcpd access control tables
are:
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TCPDCHK(8)TCPDCHK(8)
/etc/hosts.allow
/etc/hosts.deny
SEE ALSOtcpdmatch(8), explain what tcpd would do in specific cases.
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.
tlid.conf(5), format of the tlid 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
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