[Dnsmasq-discuss] extend filter-A to filter specific domains

[Olaf Hering]

Hello,

currently a large email provider broke his configuration and is unusable with IPv6 since a week.

Capable users quickly discovered the required workarounds, like entirely disabling IPv6 on the clients for the time being.

One client application has an interesting feature, which allows to ignore AAAA responses for a specific domain during DNS lookup. This allows it to continue with IPv6 for other connections, and use IPv4 only for such DNS domains.


Unfortunately dnsmasq apparently lacks such feature. Since 2.87 the option 'filter-A' and 'filter-AAAA' exist, but this affects all queries. What are the chances to implement something like 'filter-AAAA[=dom.tld]', to remove AAAA records for the specified domain? There seems to be such concept already for other options, such as 'server='.


Thanks,
Olaf
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