Cisco Cisco Expressway
Purpose
Source Dest.
Source
IP
IP
Source port
Transport
protocol
protocol
Dest. IP
Dest.
port
port
NTP (time sync)
EXPe
NTP
server
server
192.0.2.2 123
UDP
NTP
servers
servers
123
Cisco Expressway Basic Configuration Deployment Guide (X8.5.2)
Page 45 of 57
Appendix 3: Firewall and NAT settings