Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 3 – Firewall and NAT configuration
Cisco VCS Basic Configuration (Control with Expressway) Deployment Guide
Page 55 of 69
Inbound (DMZ > Internal network)
Purpose
Source Destination Source
IP
Source port
Transport
protocol
protocol
Dest. IP
Dest.
port
port
Logging
VCSe
Syslog
server
server
192.0.2.2 40000 to
49999
UDP
10.0.0.13 514
Management
VCSe
TMS server
192.0.2.2 >=1024
TCP
10.0.0.14 80 / 443
LDAP (for login, if
required)
required)
VCSe
LDAP
server
server
192.0.2.2 40000 to
49999
TCP
389 /
636
636
NTP (time sync)
VCSe
NTP server
192.0.2.2 >=1024
UDP
123
Access to services such as DNS (UDP port 53) and NTP (UDP port 123) for time synchronization should be
permitted on the appropriate firewall.
permitted on the appropriate firewall.
n
Traffic destined for the Logging and Management server addresses (using specific destination ports) must
be routed to the internal network.
be routed to the internal network.
External firewall configuration requirement
In this example it is assumed that outbound connections (from DMZ to external network) are all permitted by
the firewall device.
the firewall device.
n
Ensure that any SIP or H.323 "fixup" ALG or awareness functionality is disabled on the NAT firewall – if
enabled this will adversely interfere with the VCS functionality.
enabled this will adversely interfere with the VCS functionality.
Inbound (Internet > DMZ)
Purpose
Source
Dest.
Source
IP
IP
Source
port
port
Transport
protocol
protocol
Dest. IP
Dest. port
H.323 endpoints registering with Assent
RAS Assent
Endpoint VCSe Any
>=1024
UDP
192.0.2.2 1719
Q.931/H.225 and
H.245
H.245
Endpoint VCSe Any
>=1024
TCP
192.0.2.2 2776
RTCP Assent
Endpoint VCSe Any
>=1024
UDP
192.0.2.2 2777
RTP Assent
Endpoint VCSe Any
>=1024
UDP
192.0.2.2 2776
H.323 endpoints registering with public IP addresses
RAS
Endpoint VCSe Any
1719
UDP
192.0.2.2 1719
Q.931/H.225
Endpoint VCSe Any
>=1024
TCP
192.0.2.2 15000 to
19999
H.245
Endpoint VCSe Any
>=1024
TCP
192.0.2.2 1720
RTP & RTCP
Endpoint VCSe Any
>=1024
UDP
192.0.2.2 50000 to
54999
SIP endpoints registering using UDP / TCP or TLS