Setting the (DNS) record straight

Transcript

1. A record A Record Address or A records (also known as host records) are the central records of DNS. These records link a domain to an IP address. In this example, both the naked domain as well as the www subdomain are being pointed to the IP address 184.154.54.99 of an abandoned linux box somewhere in the cloud so it shows account suspended. MX record MX Record Mail Exchange (MX) records direct email to servers for a domain. Multiple MX records can be defined for a domain, each with a different priority where the lowest number is the highest priority. If mail can't be delivered using the first priority record, the second priority record is used, and so on. Setting the (DNS) records straight Setting the (DNS) records straight Page 1
2. TXT record TXT Record Text or TXT records may contain arbitrary text but can also be used to define machine readable text. Also, you can use TXT records to implement email abuse prevention methods such as SPF, DKIM, and DMARC. For instance, example.com might have a TXT record with value “google-site- verification=rXOxyZounnZasA8Z7oaD3c14JdjS9aKSWvsR1EbUSIQ” which may be used to verify domain ownership to activate Google Apps. CNAME alias CNAME Record Canonical Name or CNAME records link an alias name to another canonical domain name. For instance, gotogoogle.e3innov.com might link to google.com. Setting the (DNS) records straight Setting the (DNS) records straight Page 2
3. Subdomain Forwarding without masking Domain or subdomain forwarding to a URL is done on a webserver not in the zone file. This is why you see it supported in some sites (say, godaddy) and not others. CNAME entries are made in zone file. A CNAME example: www.example.com. IN CNAME www.test.com. www.test.com is a domain name www.test.com/test.php is a URL Setting the (DNS) records straight Setting the (DNS) records straight Page 3
4. Subdomain Forward with masking This will forward the subdomain maskthis.yourdomain.com to www.thencta.com while masking the target. Setting the (DNS) records straight Setting the (DNS) records straight Page 4