IADB Query Instructions

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IADB Query Instructions

The ISIPP Accreditation Database is an in-addr prefix style DNS list which resides at iadb.isipp.com.

When queried, the IADB will return one or more A records for any site which is listed in the IADB. These are as follows:

127.0.0.1 Listed in IADB
127.0.0.2 Vouched listing
127.0.0.3 Publishes SPF record

Note that a query can return more than one response for any given listing; each response is option-specific. For example 127.0.0.1 means that the site is listed in IADB, and 127.0.0.2 means that the listing is a vouched listing. Thus for a site which is listed in IADB and which is a vouched listing, a query will return “127.0.0.1; 127.0.0.2”, providing the querying site with the very specific information that the site is listed in IADB, and that the listing is a vouched listing.

This level of granularity allows querying sites to make decisions based on precise information regarding a listing in the IADB.

Examples:

A dig for 192.168.1.1 returns this (relevant sections only shown here):

[Note: When querying a DNS list for the presence of an IP address, that IP adress must be reversed in the query.]

> dig 1.1.168.192.iadb.isipp.com

; <<>> DiG 9.2.3rc4 <<>> 1.1.168.192.iadb.isipp.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51677 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1 ;; QUESTION SECTION: ;1.1.168.192.iadb.isipp.com. IN A ;; ANSWER SECTION: 1.1.168.192.iadb.isipp.com. 3600 IN A 127.0.0.1 1.1.168.192.iadb.isipp.com. 3600 IN A 127.0.0.2 The above shows that 192.168.1.1. is listed in the IADB, and that it is a vouched listing. Similarly, a dig for accredhost.isipp.com returns this (relevant sections only shown here): >dig accredhost.isipp.com.iadb.isipp.com

; <<>> DiG 9.2.3rc4 <<>> accredhost.isipp.com.iadb.isipp.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58808 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 1 ;; QUESTION SECTION: ;accredhost.isipp.com.iadb.isipp.com. IN A ;; ANSWER SECTION: accredhost.isipp.com.iadb.isipp.com. 3600 IN A 127.0.0.2 accredhost.isipp.com.iadb.isipp.com. 3600 IN A 127.0.0.1 The above shows that accredhost.isipp.com is listed in the IADB, and is a vouched listing.