NetBSD-5.0.2/usr.sbin/tcpdrop/tcpdrop.8

.\" 	$NetBSD: tcpdrop.8,v 1.1 2007/06/25 23:34:52 christos Exp $
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.\"	$OpenBSD: tcpdrop.8,v 1.6 2006/01/03 14:52:17 jmc Exp $
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.\" Copyright (c) 2004 Markus Friedl <markus@openbsd.org>
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.Dd June 23, 2007
.Dt TCPDROP 8
.Os
.Sh NAME
.Nm tcpdrop
.Nd drop a TCP connection
.Sh SYNOPSIS
.Nm tcpdrop
.Ar laddr
.Ar lport
.Ar faddr
.Ar fport
.Sh DESCRIPTION
The
.Nm
command drops the TCP connection specified by the local address
.Ar laddr ,
port
.Ar lport
and the foreign address
.Ar faddr ,
port
.Ar fport .
Addresses and ports can be specified by name or numeric value.
.Sh EXAMPLES
If a connection to
.Xr httpd 8
is causing congestion on a network link, one can drop the TCP session
in charge:
.Bd -literal -offset indent
$ fstat | grep 'httpd.*internet.*\*(Lt--'
www      httpd      21307    3* internet stream tcp \e
	0xd1007ca8 192.168.5.41:80 \*(Lt-- 192.168.5.1:26747
.Ed
.Pp
The following command will drop the connection:
.Bd -literal -offset indent
# tcpdrop 192.168.5.41 80 192.168.5.1 26747
.Ed
.Sh SEE ALSO
.Xr fstat 1 ,
.Xr netstat 1