4 packet filter, Table 30 pre-defined port filter – ZyXEL Communications Prestige 794M User Manual
Page 67
Prestige 794M User’s Guide
67
Chapter 6 Firewall
The following table lists inbound (Internet to LAN) and outbound (LAN to Internet) traffic
that is allowed or not allowed for the pre-defined port filters. The Prestige uses the pre-defined
port filters when you select a security level in the General Settings screen.
6.4 Packet Filter
The packet filters are applicable when the firewall is enabled in the General Settings screen.
Use the Packet Filter screen to configure port and address filters. Click Configuration,
Firewall and Packet Filters.
Table 30 Pre-defined Port Filter
APPLICATION PROTOCOL
PORT
NUMBER
FIREWALL
HIGH
MEDIUM
LOW
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)
TCP(6)
119
119
NO
NO
NO
YES
NO
YES
RealAudio
(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