NAT 1:1 Log

I have a 1:1 NAT with this rule:

chain=srcnat action=src-nat to-addresses=x.x.13.100 -x.x.13.200 src-address-list=internal_ips

My internal_ip is a 192.168.100.0/25 address list


How can I do to log this nat rule in one syslog for know what internal IP corresponds with external IP ?

Thanks

in system loggins you have a remote action for send all log to a remote syslog server.