IPv6 PTR requests every ten seconds

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8

From 15:00:00 to 15:48:53 : 278 ipv6 PTR queries -> 278 uniques ipv6 addresses
From 15:00:00 to 15:46:42 : 14 ipv4 PTR queries -> 10 uniques ipv4 addresses

I try to stop ipv6 resolution...