SonicWALL TZ 190 Manuale Utente

Some common additional services offered by Dynamic DNS providers include:

Wildcards - allows for wildcard references to sub-domains. For example, if you register 
yourdomain.dyndns.org, your site would be reachable at *.yourdomain.dyndyn.org, e.g. 
server.yourdomain.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.

Using any Dynamic DNS service begins with settings up an account with the DDNS service 
provider (or providers) of your choice. It is possible to use multiple providers simultaneously. 
Refer to the links for the various providers listed above. The registration process normally 
involves a confirmation email from the provider, with a final acknowledgment performed by 
visiting a unique URL embedded in the confirmation email. After logging in to the selected 
provider's page, you should visit the administrative link (typically 'add' or 'manage'), and create 
your host entries. This must be performed prior to attempting to use the dynamic DNS client on 
SonicOS. The Network > Dynamic DNS page provides the settings for configuring the 
SonicWALL security appliance to use your DDNS service.