Download E-books DNS and BIND on IPv6 PDF

By Cricket Liu

If you are getting ready to roll out IPv6 in your community, this concise ebook offers the necessities you want to help this protocol with DNS. you are going to learn the way DNS used to be prolonged to house IPv6 addresses, and the way you could configure a BIND identify server to run at the community. This ebook additionally positive factors tools for troubleshooting issues of IPv6 ahead- and reverse-mapping, and strategies for aiding islands of IPv6 consumers converse with IPv4 resources.

Topics include:

  • DNS and IPv6—Learn the constitution and illustration of IPv6 addresses, and the syntaxes of AAAA and PTR documents within the IPv6 reverse-mapping zone
  • BIND on IPv6—Use IPv6 addresses and networks in ACLs, and sign up and delegate to IPv6-speaking identify servers
  • Resolver Configuration—Configure well known stub resolvers (Linux/Unix, MacOS X, and home windows) to question IPv6-speaking identify servers
  • DNS64—Learn in regards to the transition expertise that enables consumers with IPv6-only community stacks to speak with IPv4 servers
  • Troubleshooting—Use the nslookup and dig troubleshooting instruments to seem up the IPv6 addresses of a website identify, or reverse-map an IPv6 deal with to a site name

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Specifying IPv6 addresses in ACLs works as you’d count on it to: acl Movie-U { 2001:db8:cafe::/48; }; acl campus-subnets { 2001:db8:cafe:1::/64; 2001:db8:cafe:2::/64; }; you could, after all, combine IPv4 and IPv6 within the comparable ACL: acl terminator { 2001:db8:cafe:1::1; 192. 249. 249. 1; }; and you may negate entries, too, to avoid suits: acl all-subnet-but-terminator { ! 2001:db8:cafe:1::1; 2001:db8:cafe:1::/64; }; The integrated localhost and localnets ACLs have additionally been improved: localhost now contains the entire host’s IPv6 addresses in addition to its IPv4 addresses. (Note that this in general contains either a link-local handle and a world unicast deal with on a reputation server configured to run over IPv6. ) localnets comprises IPv4 and IPv6 networks attached to the host, offering the working approach helps choosing the prefix size of the host’s IPv6 addresses. If it doesn’t, localnets comprises in the community attached IPv4 networks yet simply the host’s IPv6 addresses. in particular with IPv6, i urge you to outline and use ACLs with intuitive names to make your named. conf documents extra readable. There’s an incredible distinction among this: allow-query { 192. 249. 249/24; 192. 253. 253/24; 2001:db8:cafe:1::/64; 2001:db8:cafe:2::/64; }; and this: allow-query { movie-u-internal-networks; }; Registering IPv6 identify Servers as soon as you’ve manage an IPv6 identify server that’s authoritative for a number of zones, it's your decision so as to add the recent IPv6 handle to these zones’ delegation info. that would require that your dad or mum aid registration of IPv6 addresses for identify servers. just about all top-level domain names, reminiscent of com, web, and org and so much huge country-code top-level domain names, akin to united kingdom and de, help IPv6 addresses for identify servers. usually, even if, you don’t deal without delay with the directors of those domain names, yet fairly paintings via an middleman referred to as a registrar. regrettably, no longer all registrars aid registration of IPv6 addresses. If yours doesn’t, you will have no selection yet to move your zones to a registrar that does, or not less than threaten to in the event that they don’t get their act jointly. the particular method you employ to check in a reputation server’s IPv6 tackle varies counting on the registrar, yet so much reliable registrars supply kind of intuitive web-based interfaces for coping with delegation details and let you easily input an IPv6 deal with there. in the event that your mum or dad quarter is controlled through another person on your organization—say a community administrator at your company’s company headquarters—ask them how they’d just like the new handle submitted. it can be as effortless as sending them e-mail. in the meanwhile, whereas IPv6 remains to be catching on, just be sure you sign up either IPv4 and IPv6 addresses in your identify servers. when you have no IPv4–speaking identify servers, so much recursive identify servers on the net can not get to the bottom of any of your domains. Delegating to IPv6 identify Servers should you deal with a father or mother area (that is, you’re the community administrator at your company’s company headquarters pointed out earlier), the directors of your subzones may well ask you so as to add IPv6 addresses to their delegation.

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