A2 Firewalls; A2.1 Firewalls - Panasonic KX-TDA0480 Getting Started

A2 Firewalls
A2.1 Firewalls
It is generally preferable that a IP Gateway network installation be connected with the IP
network outside of any existing firewall installation. When for practical or policy reasons an
installation must be routed through a firewall, some performance degradation may occur.
In the above example, the VoIP Gateway Card is routed through a firewall. The Router IP
address no longer serves as the VoIP Gateway Card's Default Gateway IP address. Instead,
the internal IP address of firewall becomes the Default Gateway IP address to be associated
with the VoIP Gateway Card.
Also, when installing the IP Gateway network within a firewall, voice and fax packets must be
routed through specified firewall ports, using the information in the following table:
Item No.
1
2
3
4
5
Router
External IP address
nnn.nnn.nnn.nnn
Fire Wall
Internal IP address
nnn.nnn.nnn.nnn
Switch/HUB
Ethernet
Hybrid IP-PBX
Type of
Communication
Q.931
H.245
RAS
RTP / RTCP
Telnet, FTP
IP Network
Workgroup
Port No.
1720
1721, 1722, 1723,
1724
1718, 1719
5004 - 5011
21, 23
TCP/UDP Priority Control
Assignment
(Recommended)
TCP Priority
TCP Priority
UDP Priority
UDP Top Priority
TCP Normal
Getting Started

A2 Firewalls

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