Appendices
Installation Manual
151
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.
Type of
Communication
Port No.
TCP /
UDP
Priority Control
Assignment
(Recommended)
1
Q.931
1720
TCP
Priority
2
H.245
1721, 1722, 1723,
1724
TCP
Priority
3
RAS
1718, 1719
UDP
Priority
4
RTP / RTCP
5004 - 5011
UDP
Top Priority
5
Telnet, FTP
21, 23
TCP
Normal
6
ISDN Service
5003
UDP
Priority
Internal IP address
nnn.nnn.nnn.nnn
External IP address
nnn.nnn.nnn.nnn
Switch/HUB
Ethernet
IP PBX
Router
Fire Wall
IP Network
Workgroup
Summary of Contents for KX-TDA0480
Page 5: ...KX TDA0480 Overview Installation Manual 5 Section 1 KX TDA0480 Overview ...
Page 76: ...Logical Installation 76 Installation Manual ...
Page 89: ...Logical Installation Installation Manual 89 Access Code Dialling Not usable ...
Page 137: ...Appendices Installation Manual 137 Appendix A Appendices ...
Page 164: ...Appendices 164 Installation Manual ...
Page 173: ...Glossary Installation Manual 173 ...