VoIP/(802.11g) Broadband Firewall Router
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
Table 1: Predefined Port Filter
Application | Protocol | Port Number | Firewall - Low | Firewall - Medium | Firewall – High | ||||||
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Start | End | Inbound | Outbound | Inbound | Outbound |
| Inbound | Outbound | |||
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HTTP(80) | TCP(6) | 80 | 80 | NO | YES | NO | YES |
| NO | YES | |
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DNS (53) | UDP(17) | 53 | 53 | NO | YES | NO | YES | NO | YES | ||
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DNS (53) | TCP(6) | 53 | 53 | NO | YES | NO | YES | NO | YES | ||
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FTP(21) | TCP(6) | 21 | 21 | NO | YES | NO | YES | NO | NO | ||
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Telnet(23) | TCP(6) | 23 | 23 | NO | YES | NO | YES | NO | NO | ||
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SMTP(25) | TCP(6) | 25 | 25 | NO | YES | NO | YES | NO | YES | ||
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POP3(110) | TCP(6) | 110 | 110 | NO | YES | NO | YES | NO | YES | ||
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NEWS(NNTP) | TCP(6) | 119 | 119 | NO | YES | NO | YES |
| NO | NO | |
(Network News | |||||||||||
Transfer Protocol) |
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RealAudio/ | UDP(17) | 7070 | 7070 | YES | YES | YES | YES |
| NO | NO | |
RealVideo | |||||||||||
(7070) |
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PING | ICMP(1) | N/A | N/A | NO | YES | NO | YES |
| NO | YES | |
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H.323(1720) | TCP(6) | 1720 | 1720 | YES | YES | NO | YES | NO | NO | ||
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T.120(1503) | TCP(6) | 1503 | 1503 | YES | YES | NO | YES | NO | NO | ||
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SSH(22) | TCP(6) | 22 | 22 | NO | YES | NO | YES | NO | NO | ||
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NTP/SNTP | UDP(17) | 123 | 123 | NO | YES | NO | YES | NO | YES | ||
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HTTP/HTTP | TCP(6) | 8080 | 8080 | NO | YES | NO | NO |
| NO | NO | |
Proxy | |||||||||||
(8080) |
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HTTPS(443) | TCP(6) | 443 | 443 | NO | YES | NO | YES |
| N/A | N/A | |
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ICQ (5190) | TCP(6) | 5190 | 5190 | YES | YES | N/A | N/A | N/A | N/A | ||
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MSN (1863) | TCP(6) | 1863 | 1863 | YES | YES | N/A | N/A | N/A | N/A | ||
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47
Chapter 4: Configuration