Unix

DNS in Action: A detailed and practical guide to DNS by Alena Kabelov¿, Libor Dost¿lek

By Alena Kabelov¿, Libor Dost¿lek

A targeted and useful advisor to DNS implementation, configuration, and management

  • Technically targeted with useful solutions
  • Comprehensive advisor to configuration and management of DNS servers
  • Covers DNS Extensions, delegation, and registration

In element

The area identify process is without doubt one of the foundations of the web. it's the procedure that enables the interpretation of human-readable domains into machines-readable IP addresses and the opposite translation of IP addresses into domains. This e-book describes the fundamental DNS protocol and its extensions; DNS delegation and registration, together with for opposite domain names; utilizing DNS servers in networks that aren't hooked up to the web; and utilizing DNS servers on firewall machines. Many precise examples are used during the booklet to teach practice a variety of configuration and management tasks.

What you are going to examine from this publication?

This booklet covers the entire simple in addition to complex makes use of of DNS: bankruptcy 1 introduces easy DNS recommendations, reminiscent of domain names and subdomains, area naming syntax, opposite domain names, zones, queries, resolvers, identify servers, forwarder servers. bankruptcy 2 explains the DNS protocol, targeting DNS question. The bankruptcy uses numerous examples of DNS client-server communique. together with an instance of a non-existent RR question and its solution, communique with a root server, and TCP and UDP DNS queries. bankruptcy three describes extension to the DNS protocol, together with DNS replace, DNS Notify, Incremental quarter move, destructive caching, DNS IPv6 Extension, DNSsec, and TSIG. bankruptcy four discusses identify server implementations, concentrating on Bind, models four, eight, and nine. The use and configuration of this system named is defined intimately. The bankruptcy additionally discusses the home windows 2000 implementation. bankruptcy five covers DNS tuning and management and instruments, comparable to named-checkconf, named-checkzone, nslookup, dnswalk, dig, and rndc. bankruptcy 6 makes a speciality of DNS delegation from a first-rate to secondary servers. the method of area registration is usually defined within the bankruptcy. bankruptcy 7 talks in regards to the delegation and registration of opposite domain names. the web registry is the topic of bankruptcy eight. It covers the local web registry, department of the area among RIR and nation codes, and RIPE database and its a number of gadgets. bankruptcy nine indicates the way to configure DNS servers in closed intranets, i.e. networks that aren't hooked up to the web. It covers configuring a root identify server on a separate server (BIND four) and configuring a reputation server for the foundation area. bankruptcy 10 covers sharing a DNS database among the net and intranet, in addition to having separate servers. It additionally discusses fitting identify servers on firewalls.

Who this publication is written for?

This booklet is for process directors and community architects who have to how one can run and configure DNS servers. A operating wisdom of TCP/IP protocols is presumed.

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Extra info for DNS in Action: A detailed and practical guide to DNS implementation, configuration, and administration

Example text

Com. com, 1, 1) -----------Got answer: HEADER: opcode = QUERY, id = 12203, rcode = NOERROR header flags: response, want recursion, recursion avail. com The nslookup program is set to the d2 debugging level. com. com, type = A, class = IN ----------------------Got answer (216 bytes): HEADER: opcode = QUERY, id = 12204, rcode = NOERROR header flags: response, want recursion, recursion avail. com 46 3 DNS Extension Till now we have described common DNS functions that every DNS implementation should support.

The local name server waits for the answer from the forwarder server for the final result. If the local name server does not get the answer in the set time out limit, then it contacts the root name servers and tries to solve the case by iteration. 24 Chapter 1 If the local name server is not supposed to contact the root name servers, but is supposed to only wait for the answer, then it is necessary to indicate such a server in its configuration as a forwarder-only. x such a server is called slave.

1 DNS Update The DNS Update mechanism is described in RFC 3007. The DNS Update operation enables dynamic correction of entries in the DNS database. Therefore, this is also referred to as dynamic update. DNS Update provides for adding/deleting one or more records to/from the zone file. , master/slave name server. DNS Update is also widely used by Windows 2000 as the fundamental features of DNS Update: • The DNS database entries (RR) do not need to be statically corrected by the system administrator, but can be corrected dynamically by using DNS protocol.

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