Change NTP source port from 123 to 1024 for inbound of inside interfac

[ckinard]

I have a weird requirement. ATT Fiber gateway blocks NTP port 123 (source only ---> Internet). I want to map the source port to 1024 for the NTP service on inside interface going to Internet (inbound on inside interface), and re-map reply destination (1024 back to  123) for outbound on inside interface to my local network NTP source.
Thanks in Advance any and all
Calvin

[MHM Cisco World]

NAT(IN'OUT) source static object-real-IP object-map-IP service NTP-real NTP -map

object service NTP-real
service tcp source eq 123
object service NTP-map
service tcp source eq 1024

Try This way 

MHM