CHOPARP(8) BSD System Manager's Manual CHOPARP(8)NAMEchoparp — cheap and omitted proxy ARP
SYNOPSIS
chpoarp if_name mac_addr [-]net_addr[/net_mask] ...
DESCRIPTIONchoparp is a easy-to-use proxy ARP daemon. It watches ARP request pack‐
ets visible on the interface specified by argument if_name, and sends
proxy ARP reply to the sender if the ARP request queries the MAC address
(ethernet hardware address) for the network specified by net_addr/
net_mask.
mac_addr is th MAC address to be published for the specified hosts. It
is normally the address of if_name. The format of mac_addr must be 6
colon-separated bytes of hexadecimal value, such as 00:00:01:01:14:46.
The keyword auto can also be used to use the address of if_name from the
system configuration.
A carp(4) virtual router address can be specified as vhid:<hex>
net_addr must be in dotted quad notation (for example 133.138.1.134) or
be a 32 bit hexadecimal value starting with “0x” (for example
0x858a0186). net_mask can likewise be speficied as a dotted quad or
hexadecimal value, or alternatively as a mask length. The following
address specifications are therefore equivalent:
192.168.98.0/255.255.254.0
192.168.98.0/0xfffffe00
192.168.98.0/23
Multiple addresses can be specified. Addresses can be excluded by pre‐
ceding them with -
EXAMPLES
If you have network interface “ne0” with MAC address “00:00:01:01:14:16”,
and would like to send proxy ARP reply for 192.168.0.64/26, the argument
would be as follows:
choparp ne0 00:00:01:01:14:46 192.168.0.64/255.255.255.192
BUGS
Supports Ethernet interfaces only. Handles single interface at a time.
(you can start multiple choparp for multiple interfaces, though).
BSD November 20, 2014 BSD
