Setting
Description
TCP Ports
UDP Ports
The starting value for the range of TCP and UDP ports
the system uses. The system automatically configures
the range based on the beginning value you set here.
To allow H.323 traffic, you need two TCP and eight
UDP ports per connection. You must also open TCP
port 1720 on the firewall.
To allow SIP traffic, you need TCP port 5060 and eight
UDP ports per connection.
UDP port range
: Because systems support ICE, the
range of fixed UDP ports is 32. The system cycles
through the available ports from call to call.
Fixed ports range and filters
: You might notice that
the source port of a SIP signaling message is not in the
fixed ports range. When your firewall is filtering on
source ports, in the system web interface, go to the
SIP
page and enable
Force Connection Reuse
. When
enabled, the system uses port 5060 and 5061 for the
source and destination port (these must be open on the
firewall).
NAT Configuration
Specifies if the system automatically determines the
NAT public (WAN) address.
▪
If the system isn’t behind a NAT or is connected to
the network through a VPN, set this option to
Off
.
▪
If the system is behind a NAT that allows HTTP
traffic, set this option to
Auto
.
▪
If the system is behind a NAT that doesn’t allow
HTTP traffic, set this option to
Manual
.
NAT Public (WAN) Address
The address callers from outside the LAN use to call
your system. If you configured the NAT manually, enter
the NAT public address here.
You can configure this option only when you set
NAT
Configuration
to
Manual
.
NAT is H.323 Compatible
Identifies whether the system is behind a NAT that can
translate H.323 traffic.
This option is available only when you set
NAT
Configuration
to
Auto
or
Manual
.
Address Displayed in Global Directory
Choose whether to display the system’s public or
private address in the global directory.
This option is available only when you set
NAT
Configuration
to
Auto
or
Manual
.
Securing the System
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