From owner-freebsd-questions@FreeBSD.ORG Fri Jan 18 21:40:37 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E0A5916A421 for ; Fri, 18 Jan 2008 21:40:36 +0000 (UTC) (envelope-from wahjava@gmail.com) Received: from ag-out-0708.google.com (ag-out-0708.google.com [72.14.246.247]) by mx1.freebsd.org (Postfix) with ESMTP id 7C35313C46A for ; Fri, 18 Jan 2008 21:40:36 +0000 (UTC) (envelope-from wahjava@gmail.com) Received: by ag-out-0708.google.com with SMTP id 31so650423aga.3 for ; Fri, 18 Jan 2008 13:40:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:to:cc:subject:x-face:references:x-pgp-fp:x-pgp:x-mailer:x-attribution:pgp:organization:from:date:in-reply-to:message-id:user-agent:face:mime-version:content-type:sender; bh=hIJf5xwJLNr/q4X7m6tm4m+31e9fw9sNKwZnARfAu/I=; b=qE4FAucwovr9KjGhm72dZxxoTfdlsjRgfsy/UTaOSGGLj/GUBLi9MTwZ43q2DRT839Kzl5Y9ugPLfTr/0W1cgKtXCEU8ahzAEBuJnVw5uWgTLrIag46CrQBCetdNGtY+ffaJTkYPTkJl0r5f6ECeJNmh4ZliY0GotZ0sELwlqFs= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=to:cc:subject:x-face:references:x-pgp-fp:x-pgp:x-mailer:x-attribution:pgp:organization:from:date:in-reply-to:message-id:user-agent:face:mime-version:content-type:sender; b=H0rZ/QOIvx+hi/YjMPNHRxJT5oPyrnZBUXsyADAicPAIFww0R9zmR3qBjG1NaIMkIWp4vp8QaHXtKyzFcz9Pgers9pHOn4aSgO6Qh7ENd+CLpGlxF425xaajtX9D1FfjLBN9+gIqax3anNAZ/1TrLdjuMklzodAXn1Mk/LDRB6I= Received: by 10.100.171.10 with SMTP id t10mr8042663ane.94.1200692435304; Fri, 18 Jan 2008 13:40:35 -0800 (PST) Received: from chateau.d.lf ( [122.162.237.78]) by mx.google.com with ESMTPS id 30sm3944441hso.14.2008.01.18.13.40.32 (version=TLSv1/SSLv3 cipher=OTHER); Fri, 18 Jan 2008 13:40:34 -0800 (PST) To: Ewald Jenisch X-Face: "\:nMpJ)EA!j>2nEu-[(+&o:N+CtL^AS\, Jv*LO5qBr#W2.\=d X-PGP-FP: 1E00 4679 77E4 F8EE 2E4B 56F2 1F2F 8410 762E 5E74 X-PGP: 762E5E74 X-Mailer: Gnus/5.11 (Oort 5.11) Emacs/22.1.50.1 (x86_64-pc-linux-gnu) X-Attribution: =?utf-8?B?4KSG4KS24KWA4KS3?= PGP: 762E5E74 Organization: /\/0/\/3 From: wahjava.ml@gmail.com (Ashish Shukla =?utf-8?B?4KSG4KS24KWA4KS3IA==?= =?utf-8?B?4KS24KWB4KSV4KWN4KSy?=) Date: Sat, 19 Jan 2008 03:10:38 +0530 In-Reply-To: <20080118150214.GA3092@aurora.oekb.co.at> (Ewald Jenisch's message of "Fri\, 18 Jan 2008 16\:02\:14 +0100") Message-ID: <87r6geke21.fsf@chateau.d.lf> User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux) Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAAJFBMVEVfX1/8/PwTExMDAwO0 tLSampr////f398oKCi/v78MDAwICAihq32EAAACU0lEQVQ4jW3UvWvbQBQA8LOJsJIsOajtZAtH Aqq8FLQUvNjhCex2UYpE7XYytPJalxJnFMImqrOkIJfcZtwGgrqEhELQ/XN9p+jLbc+Drfvx7r17 9jNxszXCV2mR9P3ACoKAOM5bugn1hRBRFAnxeErLMN4RIpbwYKwmZfgkMGDNol8PhlFrFDDalQcx BMMwXpwV8KElYqYzpmOA0a4UsC/EmrEU4ptGDq9kghTabP09g9EuFiSpJQOYXslgrEd6Aj8Q7pl+ kcFH3NRlUTIFfvyZwV4sEzwV20a4y2A/BWEYLxdYwk0Gn+Mohfa2X4bXsn8StC0uYdVI4T02cK0F is15ArcZYKeER5Q+f4JofZZHiPshJPt8BwtPrp4kF+KOp+sdpjvOjqpf3n+1bD6dTjk3ySKuZVU1 ezcdpm3h/pL4h9eP3Rw6R5bqa9t86a/1W3OVd7dpzgBMx8YAxVFgvgmqDTwEdQignOVgI1ggoQMA x40CFHzmCHgXcEoAig39MOSATTGt5znQL4qDIRIgNK2LAqYWAl47lBGDSgHNjoOt6vdDkNAtQc9E wN0EJgXQN7aMSABIGU7mMiI5CtQJzX9w9PwQYOApVqBwCMqwp9lmkKzh0qM5uPTAn/Vw0ogazK9m JRjR6pHqEVyqd1XbgPPfKkgAddClxRi49NmKcNMh+JV4T7mzqW1e2jwk3pAPjugGuCfHPLRIP/Qr tLEB9daW7HrvcLIx55i/9zjkfMlO//pnwLHyPcupzrL9AtxrFgTaN/dfGFcjreb+B9wmnzaKpz8p dKsBFjzeRQAAAABJRU5ErkJggg== MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" Sender: =?UTF-8?B?4KSG4KS24KWA4KS3IOCktuClgeCkleCljeCksg==?= Cc: freebsd-questions@freebsd.org Subject: Re: Anycast DNS - anybody? 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: Fri, 18 Jan 2008 21:40:37 -0000 --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable >>>>> Regarding Anycast DNS - anybody?; Ewald Jenisch adds: Ewald> Hi, Ewald> Has anybody out there configured anycast DNS (where multiple ins= tances Ewald> of a DNS-server run under the same IP-address in different parts= of Ewald> the network) under FreeBSD? AFAIK, anycast requires magic at routing level. So that user will connect to the nearest DNS server (holding the anycast address). Ewald> I'm looking for some hints to get started, but googling around d= idn't Ewald> provide much info on that topic... It has do with routing so you need to investigate on routing protocols, like RIP, etc. 192.168.1.1 10.0.0.1 network 10.0.0.2 192.168.1.1 [server1] --- [router1] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D [router2] --- [server2] router1, router2 -- redundant routers connecting to different ISPs So if router2 receives packet destined for 192.168.1.1, instead of sending = to server1 it'll send it to server2, since server2 is nearest to it, and vice versa. Above is a very simple configuration describing anycast. Since Anycast works only for connection-less protocols, you don't need to keep TCP connections synchronized between two servers, although both ser= vers should behave identically, i.e. return similar records. BtW, I've never implemented anycast ever, so its fully based on my imaginat= ion. HTH =2D-=20 Ashish Shukla =E0=A4=86=E0=A4=B6=E0=A5=80=E0=A4=B7 =E0=A4=B6=E0=A5=81=E0=A4= =95=E0=A5=8D=E0=A4=B2 http://wahjava.wordpress.com/ =C2=B7-- =C2=B7- =C2=B7=C2=B7=C2=B7=C2=B7 =C2=B7--- =C2=B7- =C2=B7=C2=B7=C2= =B7- =C2=B7- =C2=B7--=C2=B7-=C2=B7 --=C2=B7 -- =C2=B7- =C2=B7=C2=B7 =C2=B7-= =C2=B7=C2=B7 =C2=B7-=C2=B7-=C2=B7- -=C2=B7-=C2=B7 --- -- --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHkRzaHy+EEHYuXnQRAhtVAKDWqY4wtfpFW3BdYa55w7zsoAg7sACgvu4F U62oTUxRGhXcQn8WABZPQLc= =kUly -----END PGP SIGNATURE----- --=-=-=--