Does TCPACCESS support NTP (Network Time protocol)?
NTP is a UDP application that uses well known port 123.
TCPaccess does not supply an NTP server, but OMVS does have an NTP daemon.
Issuing "man sntpd" in OMVS will give you an overview.
If you have this configured it should be able to run through our stack as long as you do not issue commands for multicast mode and are not using IPV6 addresses.