By Alena Kabelov¿, Libor Dost¿lek
A specific and useful consultant to DNS implementation, configuration, and management
- Technically distinct with functional solutions
- Comprehensive consultant to configuration and management of DNS servers
- Covers DNS Extensions, delegation, and registration
The area identify method is likely one of the foundations of the web. it's the method that enables the interpretation of human-readable domains into machines-readable IP addresses and the opposite translation of IP addresses into domains. This publication describes the elemental DNS protocol and its extensions; DNS delegation and registration, together with for opposite domain names; utilizing DNS servers in networks that aren't attached to the net; and utilizing DNS servers on firewall machines. Many targeted examples are used during the e-book to teach practice numerous configuration and management tasks.
What you are going to study from this ebook?
This booklet covers the entire easy in addition to complicated makes use of of DNS: bankruptcy 1 introduces simple DNS recommendations, corresponding to 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 conversation. 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 region move, detrimental caching, DNS IPv6 Extension, DNSsec, and TSIG. bankruptcy four discusses identify server implementations, targeting 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, equivalent to named-checkconf, named-checkzone, nslookup, dnswalk, dig, and rndc. bankruptcy 6 specializes in DNS delegation from a major to secondary servers. the method of area registration can be defined within the bankruptcy. bankruptcy 7 talks in regards to the delegation and registration of opposite domain names. the net registry is the topic of bankruptcy eight. It covers the nearby web registry, department of the realm among RIR and kingdom codes, and RIPE database and its numerous items. bankruptcy nine indicates easy methods to configure DNS servers in closed intranets, i.e. networks that aren't attached to the net. 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 web and intranet, in addition to having separate servers. It additionally discusses fitting identify servers on firewalls.
Who this ebook is written for?
This ebook is for approach directors and community architects who have to easy methods to run and configure DNS servers. A operating wisdom of TCP/IP protocols is presumed.
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An in depth and functional advisor to DNS implementation, configuration, and management Technically specified with useful options entire advisor to configuration and management of DNS servers Covers DNS Extensions, delegation, and registration intimately The area identify process is without doubt one of the foundations of the web.
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Additional resources for DNS in Action: A detailed and practical guide to DNS implementation, configuration, and administration
Caching-only name server is neither a primary nor secondary name server (it is not an authority) for any zone. , it saves data that comes through its cache. This data is called nonauthoritative. Each server is a caching server, but by the words caching, we understand that it is neither a primary nor secondary name server for any zone. arpa, but that does not count). • Root name server is an authoritative name server for the root domain (for the dot). Each root name server is a primary server, which differentiates it from other name servers.
You can try to find another example of compression in the packet for yourself. com. 6 Inverse Query Inverse queries must not be mistaken for reverse queries. With inverse queries, for example, the IP address is translated back to the name, but the search is based on an A type RR. Reverse translation is based on a PTR type RR. Not all name servers support inverse queries. They are specified in RFC 1035. Inverse query is an obsolete query. 7 Methods of RR Transfer via a DNS Packet A single DNS packet may contain one or several RRs.
Authoritative: Server is not an authority for domain .... 0. .... = Truncated: Message is not truncated .... 1 .... = Recursion desired: Do query recursively .... 1... = Recursion available: Server can do recursive queries .... 0.. = Z: reserved (0) .... 0. = Answer authenticated: Answer/authority portion was not authenticated by the server .... .... 3 Question Section DNS query packets mostly contain only one section: it is a question section for one question (QDCOUNT=1). The question section consists of three fields: • QNAME contains a domain name.