[  253.242568][    C1] TCP: AO hash mismatch for [2001:db8:254::1].7011->[2001:db8:1::1].41564 [P.]L3index: 0
[  253.242668][    C0] TCP: AO hash mismatch for [2001:db8:1::1].41564->[2001:db8:254::1].7011 [P.]L3index: 0
[  254.266693][    C0] TCP: AO hash mismatch for [2001:db8:1::1].44424->[2001:db8:254::1].7012 [P.]L3index: 0
[  254.267484][    C2] TCP: AO hash mismatch for [2001:db8:254::1].7012->[2001:db8:1::1].44424 [P.]L3index: 0
[  254.728883][    C3] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.