Zyxel-communications Internet Security Gateway ZyWALL 100 Uživatelský manuál stáhnout pdf (Strana 159)

ZyWALL 100 Internet Security Gateway

Introducing the ZyWALL Firewall 14-3

An “End of Log” message displays for each mail in which a complete log has been sent. The following is an

example of a log sent by e-mail.

Table 14-1 View Firewall Log

FIELD DESCRIPTION EXAMPLES

# This is the index number of the firewall log. 128 entries

are available numbered from 0 to 127. Once they are

all used, the log will wrap around and the old logs will

be lost.

mm:dd:yy e.g., Jan 1 00 Time This is the time the log was recorded in this format.

You must configure menu 24.10 for real time;

otherwise the clock will start at 2000/01/01 00:00:00

the last time the ZyWALL was reset.

hh:mm:ss e.g., 00:00:00

From and To IP addresses Packet

Information

This field lists packet information such as protocol and

src/dest port numbers (TCP, UDP), or protocol, type

and code (ICMP).

Protocol and port numbers

This field states the reason for the log; i.e., was the

rule matched, not matched or was there an attack. The

set and rule coordinates (<X, Y> where X=1,2;

Y=00~10) follow with a simple explanation. There are

two policy sets: set 1 (X = 1) is for LAN to WAN rules

and set 2 (X = 2) for WAN to LAN rules. Y represents

the rule in the set. You can configure up to 10 rules in

any set (Y = 01 to 10). Rule number 00 is the default

rule.

not match

<1,01> dest IP

This means this packet does

not match the destination IP

address in set 1, rule 1. Other

reasons (instead of dest IP)

are src IP, dest port, src port

and protocol.

Reason

This is a log for a DoS attack. attack

land, ip spoofing, icmp echo,

icmp vulnerability, NetBIOS,

smtp illegal command,

traceroute, teardrop or syn

flood

Action This field displays whether the packet was blocked or

forwarded. None means that no action is dictated by

this rule.

block, forward

or none

After viewing the firewall log, ENTER “y” to clear the log or “n” to retain it. With either option you will be

returned to Menu 21- Filter and Firewall Setup.

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