ADSL2+ (802.11g) (VPN) Firewall Router
Chapter 4: Configuration
55
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 being preconfigured.
Table 1: Predefined Port Filter
Port Number
Firewall - Low
Firewall - Medium
Firewall – High
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
NO
YES
DNS (53)
TCP(6)
53
53
NO
YES
NO
YES
NO
YES
FTP(21)
TCP(6)
21
21
NO
YES
NO
YES
NO
NO
Telnet(23)
TCP(6)
23
23
NO
YES
NO
YES
NO
NO
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(NNTP)
(Network
News
Transfer Protocol)
TCP(6)
119
119
NO
YES
NO
YES
NO
NO
RealAudio/
RealVideo
(7070)
UDP(17) 7070 7070
YES
YES
YES
YES
NO
NO
PING
ICMP(1) N/A
N/A
NO
YES
NO
YES
NO
YES
H.323(1720) TCP(6)
1720 1720
YES
YES
NO
YES
NO
NO
T.120(1503)
TCP(6)
1503 1503
YES
YES
NO
YES
NO
NO
SSH(22)
TCP(6)
22
22
NO
YES
NO
YES
NO
NO
NTP /SNTP
UDP(17) 123
123
NO
YES
NO
YES
NO
YES
HTTP/HTTP
Proxy
(8080)
TCP(6)
8080 8080
NO
YES
NO
NO
NO
NO
HTTPS(443) TCP(6)
443
443
NO
YES
NO
YES
N/A
N/A
ICQ (5190)
TCP(6)
5190 5190
YES
YES
N/A
N/A
N/A
N/A
MSN (1863)
TCP(6)
1863 1863
YES
YES
N/A
N/A
N/A
N/A
