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802.11g ADSL2+ VPN Firewall Router
Chapter 4: Configuration
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
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