VoIP/ 802.11g ADSL2+ Firewall Router
Chapter 4: Configuration
61
Example: Predefined Port Filters Rules
The predefined port filter rules for High, Medium and Low security levels are listed. See Table 1.
(
Note
:
Firewall – All Blocked/User-defined
, you must define and create the port filter rules
yourself. No predefined rule is set)
Table 1: Predefined Port Filter
Port Number
Firewall - High
Firewall - Medium
Firewall – Low
Application Protocol
Start
End
Inbound Outbound Inbound Outbound Inbound Outbound
HTTP(80)
TCP(6)
80
80
NO
YES
NO
YES
NO
YES
DNS (53)
UDP(17)
53
53
NO
YES
NO
YES
YES
YES
DNS (53)
TCP(6)
53
53
NO
YES
NO
YES
YES
YES
FTP(21)
TCP(6)
21
21
NO
NO
NO
YES
NO
YES
Telnet(23)
TCP(6)
23
23
NO
NO
NO
YES
NO
YES
SMTP(25)
TCP(6)
25
25
NO
YES
NO
YES
NO
YES
POP3(110) TCP(6)
110
110
NO
YES
NO
YES
NO
YES
NEWS(119)
(Network News
Transfer
Protocol)
TCP(6)
119
119
NO
NO
NO
YES
NO
YES
RealAudio/
RealVideo
(7070)
UDP(17)
7070
7070
NO
NO
YES
YES
YES
YES
PING
ICMP(1)
N/A
N/A
NO
YES
NO
YES
NO
YES
H.323(1720) TCP(6)
1720
1720
NO
NO
NO
YES
YES
YES
T.120(1503) TCP(6)
1503
1503
NO
NO
NO
YES
YES
YES
SSH(22)
TCP(6)
22
22
NO
NO
NO
YES
YES
YES
NTP(123) UDP(17)
123
123
NO
YES
NO
YES
NO
YES
HTTPS(443) TCP(6)
443
443
NO
NO
NO
YES
NO
YES
ICQ (5190) TCP(6)
5190
5190
NO
NO
NO
NO
YES
YES
Inbound:
Internet to LAN
Outbound:
LAN to Internet.
