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Category talk:FireBrick USB Dongles
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21:36, 30 October 2018
Question about ra-dns in example
== RA-DNS attribute in example ==
From what I can see based on actual testing of IPv6 in normal mode and 6in4 tunnelled dongle-failover mode, the ra-dns attribute as shown in the examples is not necessary. Am I correct in this?
I would suggest that this should be removed if it is not necessary, as it is confusing, might imply that it is essential for some reason. Also it is evil, because it causes clients to bypass the beneficial local caching provided by the Firebrick as a relay caching DNS server itself, since the clients will go directly to the AA DNS servers. Also it is (very slightly) evil for a second reason - during failover, it will cause IPv6-speaking clients to perform IPv6 DNS which is tunnelled so slightly less efficient. Is that correct?
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