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MKBL4(8)			      mkbl4				MKBL4(8)

NAME
     mkbl4 - Process IPv4 SOCKS blacklist file

SYNOPSIS
     /usr/local/sbin/mkbl4 {txtfile} {dbfile}

DESCRIPTION
     mkbl4  reads txtfile, which is a flat, plain text file whose lines are for-
     matted as follows:

	 description:aaa.bbb.ccc.ddd-eee.fff.ggg.hhh

     The description part of each line, the part that precedes the colon, is ig-
     nored. An IPv4 address range, expressed as a starting-ending address range,
     follows the colon.

     The IP address ranges are	sorted,  and  overlapping  ranges  are	removed.
     mkbl4  creates  dbfile,  a  binary  database  format  that's  used  by  the
     sockd(1)[1] SOCKS server. The "block4=" setting in the  socksrc(5)[2]  con-
     figuration file.

     The contents of any existing dbfile are replaced complete.

	 Note

	 mkbl4	creates  a  new database in a temporary file, then renames it to
	 dbfile. It is safe to run mkbl4 while sockd is using dbfile at the same
	 time.

SEE ALSO
     socksify(1)[3], socksrc(5)[2].

AUTHORS
     Double Precision, Inc.

NOTES
      1.

	 sockd(1)
	 [set $man.base.url.for.relative.links]/sockd.html

      2.

	 socksrc(5)
	 [set $man.base.url.for.relative.links]/socksrc.html

      3.

	 socksify(1)
	 [set $man.base.url.for.relative.links]/socksify.html

Courier Mail Server		   10/28/2020				MKBL4(8)

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