Date: Sat, 28 Dec 2002 11:27:53 -0600 From: Len Conrad <LConrad@Go2France.com> To: freebsd-questions@freebsd.org Subject: Re: What are the SMTP rules for sending mail to FreeBSD Message-ID: <5.1.1.6.2.20021228111607.0243f108@mail.go2france.com> In-Reply-To: <3E0DD0BD.5010207@quadtelecom.com> References: <3E0DBCFC.5040907@quadtelecom.com>
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>Easier said than done. I've been assigned 66.45.116.136/29 by the ISP. .136 is not a power of 2 which is required for classless reverse delegation. It should be .132/29 or .140/29 >I control DNS for quadtelecom.com, but I don't control the reverse >lookup. I'd like to know the exact algorithm in use, so that I can >negotiate with my ISP. For sub-Class C delegation, see the DNS & BIND book, 4th edition. 1. Your ISP creates a arbitrarily named node in the reverse domain and delegates the zone to you: tabak.116.45.66.in-addr.arpa. NS ns1.quadtelecom.com. tabak.116.45.66.in-addr.arpa. NS ns2.quadtelecom.com. 2. then for each ip in your tabak subzone he create a CNAME in his NS: 133.116.45.66.in-addr.arpa. CNAME 133.tabak.116.45.66.in-addr.arpa. . . . 139.116.45.66.in-addr.arpa. CNAME 139.tabak.116.45.66.in-addr.arpa. 3. then in your NS: 133.tabak.116.45.66.in-addr.arpa. PTR name.what.ever. . . . 139.tabak.116.45.66.in-addr.arpa. PTR hostname.some.dom. The rule is that the parent domain's CNAME rdata field must, of course, be matched the child domain's PTR owner field. >For example, how are are hosts with multiple IP adresses handled? put only one PTR per ip. Len To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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