DNS
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Tools
- http://network-tools.com/ - good all round domain/ip tool
- http://www.who.is/ - basic whois archive records
Basic DNS Records
From DreamHost wiki;
- A
- Forward mapping of hostname to an IP address (66.33.201.141).
- AAAA
- Forward mapping of hostname to an IPv6 address.
- PTR
- Reverse mapping of an IP address (66.33.201.141) to a hostname (dreamhost.com).
- MX
- Mail eXchange records tell you which hostname to connect to for sending email.
- CNAME
- Say it, See Name, it points one domain name to another domain name, including mail service.
- TXT
- Text records, these are free form text strings, used for things like SPF.
- SRV
- Service records advertise a specific service a server offers. Zeroconf and XMPP Federation (Jabber and Google Apps) use SRV records in addition to PTR records.
- NS
- Delegates a domain or subdomain to another DNS server.