# CIDR_TABLE(5)                                       CIDR_TABLE(5)
# 
# NAME
#        cidr_table - format of Postfix CIDR tables
# 
# SYNOPSIS
#        postmap -q "string" cidr:/etc/postfix/filename
# 
#        postmap -q - cidr:/etc/postfix/filename <inputfile
# 
# DESCRIPTION
#        The  Postfix  mail  system  uses  optional  access control
#        tables.  These tables are usually in  dbm  or  db  format.
#        Alternatively,  access  control tables can be specified in
#        CIDR form.
# 
#        To find out what types of lookup tables your Postfix  sys-
#        tem supports use the postconf -m command.
# 
#        To   test  lookup  tables,  use  the  postmap  command  as
#        described in the SYNOPSIS above.
# 
# TABLE FORMAT
#        The general form of a Postfix CIDR table is:
# 
#        network_address/network_mask     result
#               When a search string matches the specified  network
#               block, use the corresponding result value.
# 
#        network_address     result
#               When  a search string matches the specified network
#               address, use the corresponding result value.
# 
#        blank lines and comments
#               Empty lines and whitespace-only lines are  ignored,
#               as  are  lines whose first non-whitespace character
#               is a `#'.
# 
#        multi-line text
#               A logical line starts with non-whitespace  text.  A
#               line  that starts with whitespace continues a logi-
#               cal line.
# 
# SEARCH ORDER
#        Patterns are applied in the  order  as  specified  in  the
#        table,  until  a  pattern is found that matches the search
#        string.
# 
# EXAMPLE SMTPD ACCESS MAP
#        /etc/postfix/main.cf:
#            smtpd_client_restrictions = ... cidr:/etc/postfix/client.cidr ...
# 
#        /etc/postfix/client.cidr:
#            # Rule order matters. Put more specific whitelist entries
#            # before more general blacklist entries.
#            192.168.1.1             OK
#            192.168.0.0/16          REJECT
# 
# SEE ALSO
#        regexp_table(5) format of regular expression tables
#        pcre_table(5) format of PCRE tables
#        tcp_table(5) TCP client/server table lookup protocol
# 
# AUTHOR(S)
#        The CIDR table lookup code was originally written by:
#        Jozsef Kadlecsik
#        kadlec@blackhole.kfki.hu
#        KFKI Research Institute for Particle and Nuclear Physics
#        POB. 49
#        1525 Budapest, Hungary
# 
#        Adopted and adapted by:
#        Wietse Venema
#        IBM T.J. Watson Research
#        P.O. Box 704
#        Yorktown Heights, NY 10598, USA
# 
#                                                     CIDR_TABLE(5)
