Internet time sync getting blocked ?

I noticed tonight that my internet time syncronization is getting blocked, pinging the various time servers times out x 4

I'm not sure if this is a NIS firewall issue or my dsl modem firewall issue.  I do see some messages in my modems log that indicate

a service is being blocked on port 123 / UDP

 

Is there a setting in NIS to allow Network Time Protocol UDP on port 123 ... if so where can I find this ?

 

Thanks 

BY:robothappy: