Join GitHub today
GitHub is home to over 28 million developers working together to host and review code, manage projects, and build software together.Sign up
NOTIMP is only appropriate for an unsupported opcode #5611
In rfc1035 is not very clear about this
But there is room for discussion.
rfc2136 on the other hand, is very clear about the use of NOTIMP
This pull is replacing NOTIMP with REFUSED for non opcode related use.