I am having a problem with time synchronization on a small business server 2003 premium.
SBS2003 as domain controller and ISA service installed (I know this is not the best setup!)
NTP sync (port 123) is blocked by ISA and I have tried many different rules also where I basically allow all protocols from external to internal and local host and vice versa but it always blocks the NTP protocol.
In the system policy I have added both external, internal and local host without any luck.
I am missing something, but I can't pin point it.