\" $NetBSD: tcpdrop.8,v 1.1 2007/06/25 23:34:52 christos Exp $
\"
\" Copyright (c) 1989, 1993
\" The Regents of the University of California. All rights reserved.
\"
\" This code is derived from software contributed to Berkeley by
\" Herb Hasler and Rick Macklem at The University of Guelph.
\"
\" Redistribution and use in source and binary forms, with or without
\" modification, are permitted provided that the following conditions
\" are met:
\" 1. Redistributions of source code must retain the above copyright
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\" 2. Redistributions in binary form must reproduce the above copyright
\" notice, this list of conditions and the following disclaimer in the
\" documentation and/or other materials provided with the distribution.
\" 3. Neither the name of the University nor the names of its contributors
\" may be used to endorse or promote products derived from this software
\" without specific prior written permission.
\"
\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
\" SUCH DAMAGE.
\"
\" $OpenBSD: tcpdrop.8,v 1.6 2006/01/03 14:52:17 jmc Exp $
\"
\" Copyright (c) 2004 Markus Friedl <
[email protected]>
\"
\" Permission to use, copy, modify, and distribute this software for any
\" purpose with or without fee is hereby granted, provided that the above
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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
