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cidr_table (5)
  • >> cidr_table (5) ( Linux man: Форматы файлов )
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    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 lookup tables. These tables are usually in dbm or db format. Alternatively, lookup tables can be specified in CIDR (Classless Inter-Domain Routing) form.

    To find out what types of lookup tables your Postfix system supports use the "postconf -m" command.

    To test lookup tables, use the "postmap -q" 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. Specify 0.0.0.0/0 to match every IPv4 address, and ::/0 to match every IPv6 address.

    An IPv4 network address is a sequence of four decimal octets separated by ".", and an IPv6 network address is a sequence of three to eight hexadecimal octet pairs separated by ":".

    Before comparisons are made, lookup keys and table entries are converted from string to binary. Therefore table entries will be matched regardless of redundant zero characters.

    Note: address information may be enclosed inside "[]" but this form is not recommended.

    IPv6 support is available in Postfix 2.2 and later.

    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 logical line.
     

    TABLE 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

    postmap(1), Postfix lookup table manager
    regexp_table(5), format of regular expression tables
    pcre_table(5), format of PCRE tables
    
     

    README FILES

    
    
    Use "postconf readme_directory" or
    "postconf html_directory" to locate this information.
    
    
    DATABASE_README, Postfix lookup table overview
    
     

    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
    
    

     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    TABLE FORMAT
    TABLE SEARCH ORDER
    EXAMPLE SMTPD ACCESS MAP
    SEE ALSO
    README FILES
    AUTHOR(S)


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