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DNS and BIND 5e
DNS and BIND tells you everything you need to work with one of the Internet's fundamental building blocks: the distributed host information database that's responsible for translating names into addresses, routing mail to its proper destination, and even listing phone numbers with the new ENUM standard. This book brings you up-to-date with the latest changes in this crucial service.The fifth edition covers BIND 9.3.2, the most recent release of the BIND 9 series, as well as BIND 8.4.7. BIND 9.3.2 contains further improvements in security and IPv6 support, and important new features such as internationalized domain names, ENUM (electronic numbering), and SPF (the Sender Policy Framework).Whether you're an administrator involved with DNS on a daily basis or a user who wants to be more informed about the Internet and how it works, you'll find that this book is essential reading. Topics include: * What DNS does, how it works, and when you need to use it * How to find your own place in the Internet's namespace * Setting up name servers * Using MX records to route mail * Configuring hosts to use DNS name servers * Subdividing domains (parenting) * Securing your name server: restricting who can query your server, preventing unauthorized zone transfers, avoiding bogus servers, etc. * The DNS Security Extensions (DNSSEC) and Transaction Signatures (TSIG) * Mapping one name to several servers for load sharing * Dynamic updates, asynchronous notification of change to a zone, and incremental zone transfers * Troubleshooting: using nslookup and dig, reading debugging output, common problems * DNS programming using the resolver library and Perl's Net::DNS module
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Cisco CISCO UMBRELLA DNS SECURITY
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Cisco VPN DNS LOAD BALANCINGTRAFFIC
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Have the DNS data from Cloudflare simply disappeared?
No, the DNS data from Cloudflare has not simply disappeared. Cloudflare experienced a widespread outage that affected its DNS services, causing disruptions for many websites and internet services. The outage was caused by a configuration error, and Cloudflare has since resolved the issue and restored its DNS services. However, during the outage, some users may have experienced difficulties accessing websites and services that rely on Cloudflare's DNS.
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Is the DNS query encrypted in the Tor network?
Yes, the DNS query is encrypted in the Tor network. When a user makes a DNS query through the Tor network, the request is encrypted and routed through multiple relays, making it difficult for anyone to intercept and monitor the query. This helps to protect the user's privacy and prevent eavesdropping on their internet activity.
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What is DNS?
DNS, or Domain Name System, is a system that translates domain names into IP addresses. It acts as a phone book for the internet, allowing users to access websites and other online services using easy-to-remember domain names instead of complex numerical IP addresses. DNS plays a crucial role in the functioning of the internet by facilitating the communication between devices and servers.
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Which DNS server?
The DNS server is a crucial component of the internet infrastructure that translates domain names into IP addresses. There are different types of DNS servers, including authoritative DNS servers, recursive DNS servers, and public DNS servers like Google DNS or OpenDNS. The choice of DNS server depends on factors such as speed, security, and reliability, so it is important to select a DNS server that meets your specific needs.
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What is the meaning of primary DNS and secondary DNS?
Primary DNS and secondary DNS are both part of the Domain Name System, which is responsible for translating domain names into IP addresses. The primary DNS server is the first point of contact for a device trying to access a website or service, and it is responsible for resolving domain names into IP addresses. The secondary DNS server acts as a backup to the primary server, and it is used if the primary server is unavailable or experiencing issues. Having both primary and secondary DNS servers helps to ensure reliable and redundant access to websites and services on the internet.
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What is the significance of primary DNS and secondary DNS?
Primary DNS and secondary DNS are both crucial components of a domain name system (DNS) setup. The primary DNS server is the first point of contact for translating domain names into IP addresses, and it is responsible for hosting the authoritative DNS records for a domain. The secondary DNS server acts as a backup to the primary server, ensuring redundancy and improving the reliability and availability of the DNS service. Having both primary and secondary DNS servers helps to distribute the DNS query load, provide failover support, and prevent downtime in case the primary server fails.
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Does the DNS client consume a lot of internet?
No, the DNS client itself does not consume a lot of internet bandwidth. The DNS client simply sends requests to DNS servers to translate domain names into IP addresses, which is a small amount of data. The actual data transfer for loading web pages or downloading files is done separately from the DNS lookup process.
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What's wrong with the internet and the DNS servers?
The internet and DNS servers can face several issues, such as security vulnerabilities, outages, and performance issues. Security vulnerabilities can lead to cyber attacks, data breaches, and unauthorized access to sensitive information. Outages can disrupt internet connectivity and cause inconvenience for users. Performance issues can slow down internet speeds and impact the user experience. Additionally, the centralized nature of DNS servers can make them a target for attacks, leading to potential service disruptions. Overall, these issues can impact the reliability and security of the internet and DNS servers.
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