Automatically check the correctness of the DNS settings.

ARNES operates the primary server for the .si domain, which must contain appropriate records for all domains that holders wish to be visible on the Internet. After registering a domain name under the .si, the new domain name must also be entered into the primary DNS server.

ARNES operates the primary servers for both .si and .edus.si.

Administrative rules

The correctness of settings and the operation of DNS servers is checked every day between 12:00 and 15:00. After each check, an email is sent to the address given on the authorisation form. In the event of an error in the DNS server settings for the domain name, you should contact your authorised person. ARNES offers advice and technical help for DNS server settings only to organisations connected to the ARNES network.

A domain name will be excluded from this automatic checking procedure if it fails within two months of ARNES receiving an insertion request that does not meet technical criteria. If this happens a new request for entry into the DNS will have to be made.

Users of the ARNES network can contact hostmaster@arnes.si for help.

Technical requirements

• The primary DNS server and at least one secondary DNS server must exist for the domain. It is recommended that at least one secondary server should be in a different physical location from the primary server.
• Domain data must contain a SOA (Start of Authority) record in standard format. Data on the domain server in the SOA record must be the name of the primary server, and the email address given in the SOA record. Their information must be valid and active. The serial number and time-intervals must meet the recommended values (see example below).
• Under Internet standards, the address postmaster@domain.si must be operational, and the relevant MX record must exist.
• NS records must refer to operating DNS servers. Records on all listed servers must match.

Recommended values in SOA record

Parameter	Value
Refresh	8 hours (28800 seconds)
Retry	2 hours (7200 seconds)
Expire	7 days(604800 seconds)
Time To Live	1 day (86400 seconds)

Example SOA record for domain name domain.si:

domain.si. IN SOA primary.domain.si. hostmaster.domain.si.
(
    1      ; serial
    28800  ; refresh
    7200   ; retry
    604800 ; expire
    86400  ; TTL
)

Other parameters

Example NS records for domain name domain.si:

domain.si. IN NS primary.domain.si.
domain.si. IN NS secondary-1.domain.si.
domain.si. IN NS secondary-2.domain.si. 

A record for localhost must be defined within the domain:

localhost.domain.si. IN A 127.0.0.1