[  255.800564][    C2] TCP: AO hash mismatch for [2001:db8:1::1].59720->[2001:db8:254::1].7013 [P.]L3index: 0
[  255.801063][    C2] TCP: AO hash mismatch for [2001:db8:1::1].59720->[2001:db8:254::1].7013 [.]L3index: 0
[  256.824193][    C3] TCP: AO hash mismatch for [2001:db8:254::1].7014->[2001:db8:1::1].55756 [P.]L3index: 0
[  256.824554][    C2] TCP: AO hash mismatch for [2001:db8:254::1].7014->[2001:db8:1::1].55756 [.]L3index: 0
[  259.211171][    C2] TCP: request_sock_TCPv6: Possible SYN flooding on port [2001:db8:254::1]:7010. Sending cookies.