Editing Proxy ARP (section)

{{short description|Technique by which a proxy device answers ARP queries for an IP address that is not on its network}}

'''Proxy ARP''' is a technique by which a [[proxy server]] on a given network answers the [[Address Resolution Protocol]] (ARP) queries for an [[IP address]] that is not on that network. The proxy is aware of the location of the traffic's destination and offers its own [[MAC address]] as the (ostensibly final) destination.<ref>{{cite web |url=https://www.itworld.com/article/2794563/data-center/arp-networking-tricks.html |title=ARP networking tricks |date=October 10, 2001 |author=Hal Stern |publisher=ITworld |access-date=November 3, 2017 |archive-date=November 7, 2017 |archive-url=https://web.archive.org/web/20171107023310/https://www.itworld.com/article/2794563/data-center/arp-networking-tricks.html |url-status=live }}</ref> The traffic directed to the proxy address is then typically routed by the proxy to the intended destination via another interface or via a [[Tunneling protocol|tunnel]].

The process, which results in the proxy server responding with its own MAC address to an ARP request for a different IP address for proxying purposes, is sometimes referred to as ''publishing''.