332 SyncServer 600 Series User’s Guide 098-00720-000 Revision D1 – February, 2018
Appendix E IP Port Details
Timing Port Rules
DNS: inbound and outbound UDP and TCP packets on port 53
DHCP: inbound and outbound UDP packets on port 67 and 68
SNMPTRAP: inbound and outbound UDP packets on port 162
syslog: outbound UDP packets on port 514
RADIUS: inbound and outbound UDP packets, outbound on port 1812 or 1645
TACACS+: inbound and outbound TCP/UDP packets, outbound on port 49
LDAP: inbound and outbound TCP/UDP packets, outbound on port 389
Note that the rules allow inbound packets only, outbound packets that are part of the
session are allowed to go out of the port.
Timing Port Rules
The three timing ports allow the following types of IP packets.
NTP: inbound and outbound UDP packets on port 123
PTP: inbound and outbound UDP packets on ports 319 and 320
The timing ports use the following types of IP packets, but the ports do not show as
open on a port scanner:
DHCP: inbound and outbound UDP packets on port 67 and 68
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