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TCPDROP(8)		FreeBSD	System Manager's Manual		    TCPDROP(8)

NAME
     tcpdrop --	drop TCP connections

SYNOPSIS
     tcpdrop local-address local-port foreign-address foreign-port
     tcpdrop [-l] -a

DESCRIPTION
     The tcpdrop command may be	used to	drop TCP connections from the command
     line.

     If	-a is specified	then tcpdrop will attempt to drop all active connec-
     tions.  The -l flag may be	given to list the tcpdrop invocation to	drop
     all active	connections one	at a time.

     If	-a is not specified then only the connection between the given local
     address local-address, port local-port, and the foreign address
     foreign-address, port foreign-port, will be dropped.

     Addresses and ports may be	specified by name or numeric value.  Both IPv4
     and IPv6 address formats are supported.

     The addresses and ports may be separated by periods or colons instead of
     spaces.

EXIT STATUS
     The tcpdrop utility exits 0 on success, and >0 if an error	occurs.

EXAMPLES
     If	a connection to	httpd(8) is causing congestion on a network link, one
     can drop the TCP session in charge:

	   # sockstat -c | grep	httpd
	   www	    httpd      16525 3	tcp4 \
		   192.168.5.41:80	192.168.5.1:26747

     The following command will	drop the connection:

	   # tcpdrop 192.168.5.41 80 192.168.5.1 26747

     The following command will	drop all connections but those to or from port
     22, the port used by sshd(8):

	   # tcpdrop -l	-a | grep -vw 22 | sh

SEE ALSO
     netstat(1), sockstat(1)

AUTHORS
     Markus Friedl <markus@openbsd.org>
     Juli Mallett <jmallett@FreeBSD.org>

FreeBSD	9.3		       January 30, 2013			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | EXIT STATUS | EXAMPLES | SEE ALSO | AUTHORS

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