A5.3 Firewalls - Panasonic KX-TDA0480 Installation Manual

A5.3 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 KX-TDA0480 is routed through a firewall. The Router IP address
no longer serves as the KX-TDA0480's Default Gateway IP address. Instead, the internal IP
address of firewall becomes the Default Gateway IP address to be associated with the KX-
TDA0480.
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
6
Installation Manual
Router
External IP address
nnn.nnn.nnn.nnn
Fire Wall
Internal IP address
nnn.nnn.nnn.nnn
Switch/HUB
Ethernet
IP PBX
Type of
Communication
Q.931
H.245
RAS
RTP / RTCP
Telnet, FTP
ISDN Service
IP Network
Workgroup
Port No.
1720
1721, 1722, 1723,
1724
1718, 1719
5004 - 5011
21, 23
5003
TCP / Priority Control
UDP Assignment
(Recommended)
TCP Priority
TCP Priority
UDP Priority
UDP Top Priority
TCP Normal
UDP Priority
Appendices
151