Can We Stop Dns_verify.so From Requesting IPv6 (AAAA) Records From DNS? (Doc ID 2163662.1)

Last updated on JUNE 10, 2017

Applies to:

Oracle Communications Messaging Server - Version 7.0.5 to 8.0.1 [Release 7.0.0 to 8.0.0]
Information in this document applies to any platform.

Goal

All of the blacklists used are IPv4 only. Can we stop dns_verify.so from requesting IPv6 (AAAA) records from DNS?

Example IPv6 queries hitting DNS hosts as a result of using dns_verify.so:

14-Jul-2016 19:02:13.850 queries: info: client 17.xxx.xx.51#29326: view default: query: 17.xxx.xxx.66.spambl.oracle.com IN AAAA + (17.xxx.xx.9)
14-Jul-2016 19:02:13.851 queries: info: client 17.xxx.xx.66#31420: view default: query: 124.xxx.xxx.204.spambl.oracle.com IN AAAA + (17.xxx.xx.9)

mappings:

SPAMBL

 *.*.*.* $C$|SPAMHAUS;$0.$1.$2.$3.$[IMTA_LIB:dns_verify.so,dns_verify,$3.$2.$1.$0.spambl.oracle.com.|%a|$$N|$$N]|$Y$E

If we could reduce the DNS traffic by half that would be helpful, especially since that half will never ever succeed or be useful.
 

Solution

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