映射端口范围吗?试下这个
object service ports
service udp source range 10000 20000
object service ports-xlate
service udp source range 10000 20000
object network server
host 10.125.11.20
object network server-xlate
host 212.61.146.222
nat (inside,outside) source static server server-xlate service ports ports-xlate