:INPUT,POSTROUTING *mangle -j SNPT --src-pfx dead::/64 --dst-pfx 1c3::/64;=;OK -j SNPT --src-pfx dead::beef --dst-pfx 1c3::/64;;FAIL -j SNPT --src-pfx dead::/64;;FAIL -j SNPT --dst-pfx dead::/64;;FAIL -j SNPT;;FAIL