Advanced DNS Administration
All domain names registered through FastVirtual include advanced DNS options,
easily configured from the "Manage DNS" area of the account control panel:
- A (Host) - An A record is used to to point a host name (i.e. yourname.com
or yourchoice.yourname.com) at an IP address. This is the standard record
for translating host names into IP addresses.
- PTR - A PTR record (often called "Reverse DNS") does the exact opposite
of an A record, and points an IP address at a host name. If you wish to
add a PTR record for an IP address that is not hosted by FastVirtual, you
first need to contact the ISP that issued that IP address, and have them
point reverse DNS requests at our name servers (ns1.fastvirtual.com and
ns2.fastvirtual.com). If you configure a PTR record before this is done,
the record will not work.
- AAAA (IPv6 Hosts) - AAAA records will be used to point host
names to the next generation IPv6 addresses. These addresses are not yet
operational, but they are already provided for through our DNS system.
- MX (Mail Exchange) - An MX record is used to create a mail
route for a host name. It must point to an existing host, not an IP
address. If you need to point an MX record at an IP address, you must
first create an A record (i.e. mail.yourname.com) to point to that IP
address. The MX record can then point to this host name. You can add
multiple MX records to a domain. If your MX records include priority
orders (the lower the number, the higher the priority), the lower priority
mail servers will only be used in the event that the higher priority
server is inaccessible.
- CNAME (Alias) - A CNAME record is used to point a subdomain
(i.e. yourchoice.yourname.com) at another host name (somename.com or
sub.somename.com). CNAME records must point to other host names. They
cannot point to their own host name, an IP address, or a URL.
- NS (Name Server) - NS records are used to specify
authoritative name servers for a host name. NS records are not normally
- SOA (Start of Authority) - An SOA record is used to define specific DNS parameters, including
"cache", "default TTL", "expire", "refresh" and "retry".
Most DNS records enable you to enter a TTL (time to live) value,
which is used to specify the duration (in seconds) that DNS servers should
cache data retrieved from our name servers. TTL is set to 43,200 seconds (12
hours) by default. If you regularly edit DNS information, you may wish to
change this to a shorter duration. You should note, however, that some DNS
servers may ignore TTL values, in favor of their own default settings.
Note: Only edit records that you are familiar with. Incorrect DNS information can adversely affect your domain name.
For further information, please see