From owner-freebsd-questions@freebsd.org Sun Oct 8 12:42:12 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 29266E346D7 for ; Sun, 8 Oct 2017 12:42:12 +0000 (UTC) (envelope-from luzar722@gmail.com) Received: from mail-qk0-x233.google.com (mail-qk0-x233.google.com [IPv6:2607:f8b0:400d:c09::233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4E6208298F for ; Sun, 8 Oct 2017 12:42:11 +0000 (UTC) (envelope-from luzar722@gmail.com) Received: by mail-qk0-x233.google.com with SMTP id 17so21449980qkq.8 for ; Sun, 08 Oct 2017 05:42:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-transfer-encoding; bh=0OmhgTzDkptFVV0srrNrPvu8wiOmRqcAKAi4hshHg14=; b=m25Y2Xn9p8l0yNWP3GYxT9/t1Tdb68/Flz8jD3oUsbKMwLoy9IB1cUOHZDBHpBx7gR 7xIRfWvE9rlA/qJ3tzsmufSHoastUqMx0jFDTgQ3h7yMtocUAsTCxbZ1C/mWjQLqXALl cBHDdMp7pz6h1cnwNX0UCWL58re768DoJ8CkwUbaXdxmeuwSlfbNdhXDWoJ4C1GK4kXN wRd99jJU+9KuKKQDp/IV4uyoXF455XA+5SEGOjBCUQv0qKOxQXk9XyrXTh5St0U9zCCI JKxO4OuNozzNKjIvT5FeUAfQd+5AmRP4aEW7oc8fOEQwYw8DXa4z1rqGBnSFQ8V9DOPt XwvA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-transfer-encoding; bh=0OmhgTzDkptFVV0srrNrPvu8wiOmRqcAKAi4hshHg14=; b=TmZKAQO0ixY1eMqbh9CTAkmtyNAsQZtkGkS6YX7Sk7SpJfMGT54jlzasY0jv0UPuk+ xq22vkN+skuUawI/daReNvPldMgM2WjZBnKhPg/vpjTL60fA4vgKLYUVjRsiq4/H4Ozb 1G4jRjH3CSr2lH2fQVB8F1/Ud0UUIibNtPZtdZqQf0FnjFER5JX0hZ9ZB9ELsSLQPwwB bcw/0YRwumEiC45AoDpDDEA0YK2aq+5dWXvj0+2OE5tbP4D9664kmrD6eUUJxH46vw79 RAAAwPqqQDD/bQrKRPjP3o5XUZ29pVI+oodYK/1TRHUCNfbZsM4a8krwlfnUXNZM+LWZ AKYQ== X-Gm-Message-State: AMCzsaVBAMYe/Vjx+ofVhZwUknG1ixmQuybOBmuKBVoeCUksBsNC6bDi zXEf3MCT+EVbCGGPrqEW8tPUcw== X-Google-Smtp-Source: AOwi7QC76eqnN7mrIhqWtZbqMXk4/ERpVC8k+rvkEmIMR+4Xu1qYYNggkCAuPvdLZVNDlw26SEQRgA== X-Received: by 10.55.118.7 with SMTP id r7mr5831507qkc.276.1507466530290; Sun, 08 Oct 2017 05:42:10 -0700 (PDT) Received: from [10.0.10.3] (cpe-74-141-88-147.neo.res.rr.com. [74.141.88.147]) by smtp.googlemail.com with ESMTPSA id s22sm985341qta.67.2017.10.08.05.42.09 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sun, 08 Oct 2017 05:42:09 -0700 (PDT) Message-ID: <59DA1D20.3090108@gmail.com> Date: Sun, 08 Oct 2017 08:42:08 -0400 From: Ernie Luzar User-Agent: Thunderbird 2.0.0.24 (Windows/20100228) MIME-Version: 1.0 To: Erwan David CC: freebsd-questions@freebsd.org Subject: Re: forcing new dynamic ip address References: <59DA19E8.5000602@gmail.com> <7531e98e-6910-0853-b4e2-a3fe92bfb694@rail.eu.org> In-Reply-To: <7531e98e-6910-0853-b4e2-a3fe92bfb694@rail.eu.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Oct 2017 12:42:12 -0000 Erwan David wrote: > Le 10/08/17 à 14:28, Ernie Luzar a écrit : >> Hello List; >> >> I have a "home service" account from my ISP. The ISP issues an dynamic >> ip address which has not changed in 12 years. >> >> My host has 2 NICs, one which is not used. I know if I plug the internet >> cable into the un-used NIC and make the appropriate config changes and >> reboot I will get a different dynamic ip address. >> >> Is there a simpler way to expire the lease to force the ISP dhcp to >> refresh with a different dynamic ip address? >> >> The goal is to have a cron job that gets a different dynamic ip address >> assigned to my host's front door every a week. >> >> Just another level of security to make it very hard for the script >> kiddies from finding any open ports I may have. >> >> Thanks for the help. >> > > DHCP protocol states that the server should try to give you the same IP > address. And dhcp servers keep track of the addresses they allocated in > the past, to give them back if possible. > Yes I know that. The question is there a way to request their dhcp server to over ride that default behavior?