From owner-freebsd-questions@FreeBSD.ORG Sat May 12 05:30:39 2007 Return-Path: X-Original-To: questions@freebsd.org Delivered-To: freebsd-questions@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 7DA4916A400 for ; Sat, 12 May 2007 05:30:39 +0000 (UTC) (envelope-from brett@lariat.net) Received: from lariat.net (lariat.net [66.119.58.2]) by mx1.freebsd.org (Postfix) with ESMTP id E1BE713C43E for ; Sat, 12 May 2007 05:30:38 +0000 (UTC) (envelope-from brett@lariat.net) Received: (from root@localhost) by lariat.net (8.9.3/8.9.3) id XAA13036 for questions@freebsd.org; Fri, 11 May 2007 23:30:33 -0600 (MDT) Date: Fri, 11 May 2007 23:30:33 -0600 (MDT) From: Brett Glass Message-Id: <200705120530.XAA13036@lariat.net> To: questions@freebsd.org Cc: Subject: Inverse ARP query X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 May 2007 05:30:39 -0000 Is there a command in FreeBSD that can be used to do an inverse ARP query (that is, supply a MAC address and have the device respond with its IP)? I have several hardware devices here whose IP addresses I do not know, but their MAC addresses are printed on the labels. To reprogram and reset them, I need their IPs so that I can get into them via a telnet or Web interrace. I could scan for the devices' addresses, but this would take months. But if they respond to inverse ARP queries, I can find out in an instant what their IP addresses are. --Brett Glass