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Document the behaviour of the net.link.ether.inet.proxyall sysctl MIB

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variable.

PR:		docs/21826
Reviewed by:	ru
Requested by:	Bernd Luevelsmeyer
This commit is contained in:
Bruce M Simpson 2004-06-16 06:16:29 +00:00
parent 0389a508e2
commit cc090be082
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=130568
1 changed files with 19 additions and 0 deletions
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19
usr.sbin/arp/arp.4
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@ -100,6 +100,25 @@ This is no longer supported.
.Pp
ARP watches passively for hosts impersonating the local host (i.e. a host
which responds to an ARP mapping request for the local host's address).
.Pp
Proxy ARP is a feature whereby the local host will respond to requests
for addresses other than itself, with its own address.
Normally, proxy ARP in
.Fx
is set up on a host-by-host basis using the
.Xr arp 4
utility, by adding an entry for each host inside a given subnet for
which proxying of ARP requests is desired.
However, the
.Dq "proxy all"
feature causes the local host to act as a proxy for
.Em all
hosts.
It may be enabled by setting the
.Xr sysctl 8
MIB variable
.Va net.link.ether.inet.proxyall
to 1.
.Sh DIAGNOSTICS
.Em "arp: %x:%x:%x:%x:%x:%x is using my IP address %d.%d.%d.%d!" :
ARP has discovered another host on the local network which responds to