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-.\" Copyright (c) 1985, 1991, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" 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
-.\" notice, this list of conditions and the following disclaimer.
-.\" 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.
-.\" 4. 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
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" 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.
-.\"
-.\" @(#)arp.8 8.1 (Berkeley) 6/6/93
-.\" $FreeBSD$
-.\"
-.Dd December 25, 2008
-.Dt ARP 8
-.Os
-.Sh NAME
-.Nm arp
-.Nd address resolution display and control
-.Sh SYNOPSIS
-.Nm
-.Op Fl n
-.Op Fl i Ar interface
-.Ar hostname
-.Nm
-.Op Fl n
-.Op Fl i Ar interface
-.Fl a
-.Nm
-.Fl d Ar hostname
-.Op Cm pub
-.Nm
-.Fl d
-.Op Fl i Ar interface
-.Fl a
-.Nm
-.Fl s Ar hostname ether_addr
-.Op Cm temp
-.Op Cm blackhole No \&| Cm reject
-.Op Cm pub Op Cm only
-.Nm
-.Fl S Ar hostname ether_addr
-.Op Cm temp
-.Op Cm blackhole No \&| Cm reject
-.Op Cm pub Op Cm only
-.Nm
-.Fl f Ar filename
-.Sh DESCRIPTION
-The
-.Nm
-utility displays and modifies the Internet-to-Ethernet address translation
-tables used by the address resolution protocol
-.Pq Xr arp 4 .
-With no flags, the program displays the current
-.Tn ARP
-entry for
-.Ar hostname .
-The host may be specified by name or by number,
-using Internet dot notation.
-.Pp
-Available options:
-.Bl -tag -width indent
-.It Fl a
-The program displays or deletes all of the current
-.Tn ARP
-entries.
-.It Fl d
-A super-user may delete an entry for the host called
-.Ar hostname
-with the
-.Fl d
-flag.
-If the
-.Cm pub
-keyword is specified, only the
-.Dq published
-.Tn ARP
-entry
-for this host will be deleted.
-.Pp
-Alternatively, the
-.Fl d
-flag may be combined with the
-.Fl a
-flag to delete all entries.
-.It Fl i Ar interface
-Limit the operation scope to the
-.Tn ARP
-entries on
-.Ar interface .
-Applicable only to the following operations:
-display one, display all, delete all.
-.It Fl n
-Show network addresses as numbers (normally
-.Nm
-attempts to display addresses symbolically).
-.It Fl s Ar hostname ether_addr
-Create an
-.Tn ARP
-entry for the host called
-.Ar hostname
-with the Ethernet address
-.Ar ether_addr .
-The Ethernet address is given as six hex bytes separated by colons.
-The entry will be permanent unless the word
-.Cm temp
-is given in the command.
-If the word
-.Cm pub
-is given, the entry will be
-.Dq published ;
-i.e., this system will
-act as an
-.Tn ARP
-server,
-responding to requests for
-.Ar hostname
-even though the host address is not its own.
-In this case the
-.Ar ether_addr
-can be given as
-.Cm auto
-in which case the interfaces on this host will be examined,
-and if one of them is found to occupy the same subnet, its
-Ethernet address will be used.
-If the
-.Cm only
-keyword is also specified, this will create a
-.Dq "published (proxy only)"
-entry.
-This type of entry is created automatically if
-.Nm
-detects that a routing table entry for
-.Ar hostname
-already exists.
-.Pp
-If the
-.Cm reject
-keyword is specified the entry will be marked so that traffic to
-the host will be discarded and the sender will be notified the
-host is unreachable.
-The
-.Cm blackhole
-keyword is similar in that traffic is discarded but the sender is
-not notified.
-These can be used to block external traffic to a host without
-using a firewall.
-.It Fl S Ar hostname ether_addr
-Is just like
-.Fl s
-except any existing
-.Tn ARP
-entry for this host will be deleted first.
-.It Fl f Ar filename
-Cause the file
-.Ar filename
-to be read and multiple entries to be set in the
-.Tn ARP
-tables.
-Entries
-in the file should be of the form
-.Pp
-.Bd -ragged -offset indent -compact
-.Ar hostname ether_addr
-.Op Cm temp
-.Op Cm blackhole No \&| Cm reject
-.Op Cm pub Op Cm only
-.Ed
-.Pp
-with argument meanings as given above.
-Leading whitespace and empty lines are ignored.
-A
-.Ql #
-character will mark the rest of the line as a comment.
-.El
-.Sh SEE ALSO
-.Xr inet 3 ,
-.Xr arp 4 ,
-.Xr ifconfig 8 ,
-.Xr ndp 8
-.Sh HISTORY
-The
-.Nm
-utility appeared in
-.Bx 4.3 .
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