91 lines
3.5 KiB
Groff
91 lines
3.5 KiB
Groff
.\" $NetBSD: tcpdrop.8,v 1.1 2007/06/25 23:34:52 christos Exp $
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.\"
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.\" Copyright (c) 1989, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Herb Hasler and Rick Macklem at The University of Guelph.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $OpenBSD: tcpdrop.8,v 1.6 2006/01/03 14:52:17 jmc Exp $
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.\"
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.\" Copyright (c) 2004 Markus Friedl <markus@openbsd.org>
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.\"
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.\" Permission to use, copy, modify, and distribute this software for any
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.\" purpose with or without fee is hereby granted, provided that the above
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.\" copyright notice and this permission notice appear in all copies.
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.\"
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.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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.\"
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.Dd June 23, 2007
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.Dt TCPDROP 8
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.Os
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.Sh NAME
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.Nm tcpdrop
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.Nd drop a TCP connection
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.Sh SYNOPSIS
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.Nm tcpdrop
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.Ar laddr
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.Ar lport
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.Ar faddr
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.Ar fport
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.Sh DESCRIPTION
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The
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.Nm
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command drops the TCP connection specified by the local address
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.Ar laddr ,
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port
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.Ar lport
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and the foreign address
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.Ar faddr ,
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port
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.Ar fport .
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Addresses and ports can be specified by name or numeric value.
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.Sh EXAMPLES
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If a connection to
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.Xr httpd 8
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is causing congestion on a network link, one can drop the TCP session
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in charge:
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.Bd -literal -offset indent
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$ fstat | grep 'httpd.*internet.*\*(Lt--'
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www httpd 21307 3* internet stream tcp \e
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0xd1007ca8 192.168.5.41:80 \*(Lt-- 192.168.5.1:26747
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.Ed
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.Pp
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The following command will drop the connection:
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.Bd -literal -offset indent
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# tcpdrop 192.168.5.41 80 192.168.5.1 26747
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.Ed
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.Sh SEE ALSO
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.Xr fstat 1 ,
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.Xr netstat 1
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