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yi.org Help: Using The Admin Section: SOA Management

The RR Management screens allow you to edit all of the settings for each individual SOA record for Domain Names that you own. SOA (Statement of Authority) records contain information on the owner of the domain name, as well as settings describing how and when data in the DNS table should be updated. All timing values are specified in seconds. Here is a list of fields present in the SOA records:

• Origin
• NS
• Mailbox
• Serial
• Refresh
• Retry
• Expire
• Minimum
• TTL

• Origin:

  The Fully Qualified Domain Name (FQDN) that this SOA record applies to, including the trailing dot (.). Example: yi.org.

• NS:

  The FQDN of the authoritative Name Server that should always have the latest data about this Zone. Example: connubialis.crackerjack.net.

• Mailbox:

  The EMail Address of an authoritative contact person for this domain, with the at (@) symbol replaced with a dot (.), and a trailing dot added to the end. Example: wh.yi.org. for the email address wh@yi.org

• Serial:

  The serial number of this SOA. This is used by remote secondary nameservers to see if they need to download a new copy of the domain. Since yi.org does not serve secondary DNS to other servers, you shouldn't need to worry about this, but it is a generally good idea to increase the value of this field whenever you make changes to your domain.

• Refresh:

  How often a secondary DNS server should refresh the listing of the entire domain, even if the serial number doesn't change.

• Retry:

  How often a secondary DNS server should retry downloading this domain if the primary DNS server (yi.org) was not reachable earlier.

• Expire:

  The absolute longest time a DNS entry in this domain should be allowed to live in a cache before it is deleted.

• Minimum:

  The absolute least time a DNS entry in this domain must be allowed to live in a cache before it can be deleted.

• TTL:

  How long it is preferable to cache DNS information for this domain before it is deleted.

  Here are some suggested TTL values for different types of internet connections:

  • Dialup Modem, Dynamic IP - 3600 Seconds (1 hour)

    With most Dialup ISPs, your IP changes every time you reconnect.

  • Cable/ADSL, Dynamic IP - 86400 Seconds (1 day)

    With Cable/ADSL, your IP usually only changes when you reboot, and even then it is rare for your IP to change. A TTL of 86400 seconds should keep you safe.

  • Static IP - 1209600 Seconds (2 weeks)

    Setting your TTL this high when you know your IP is not going to change often is a good idea. That way, ISPs will cache your IP address for a long time, so that their users do not have to preform yi.org look-ups all the time to reach your webpage.

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