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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
Application
Protocol
Port
Number
Firewall -
Low
Firewall -
Medium
Firewall –
High
HTTP(80) TCP(6)
80
80
NO YES
NO
YES NO YES
DNS(53) UDP
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
SMPT(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) TCP(6) 119
119
NO YES
NO
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
MSN(7001) UDP(17)
7001 7001 YES
YES
N/A
N/A N/A N/A
MSN VEDIO
TCP(6)
9000 9000
NO YES
N/A
N/A N/A N/A
Inbound:
Internet to LAN
Outbound:
LAN to Internet
YES:
Allowed
NO:
Blocked
N/A:
Not Applicable