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SONICWALL SONICOS STANDARD 3.0 ADMINISTRATOR’S GUIDE
C
HAPTER
16:
Configuring Dynamic DNS
Additional Services offered by Dynamic DNS Providers
Some common additional services offered by Dynamic DNS providers include:
• Wildcards - allows for wildcard references to sub-domains. For example, if you register yourdo-
main.dyndns.org, your site would be reachable at *.yourdomain.dyndyn.org, e.g. server.yourdo-
main.dyndyn.org, www.yourdomain.dyndyn.org, ftp.yourdomain.dyndyn.org, etc.
• Mail Exchangers - Creates MX record entries for your domain so that SMTP servers can locate it
via DNS and send mail. Note: inbound SMTP is frequently blocked by ISPs - please check with
your provider before attempting to host a mail server.
• Backup MX (offered by dyndns.org, yi.org) - Allows for the specification of an alternative IP
address for the MX record in the event that the primary IP address is inactive.
• Groups - Allows for the grouping of hosts so that an update can be performed once at the group
level, rather than multiple times for each member.
• Off-Line IP Address - Allows for the specification of an alternative address for your registered
hostnames in the event that the primary registered IP is offline.