ZyXEL p-660hwp Guia Do Utilizador

Chapter 11 Firewall Configuration

P-660HWP-Dx User’s Guide

Figure 108   Firewall: Threshold

The following table describes the labels in this screen.

Table 66   Firewall: Threshold

Denial of Service 

Thresholds

One Minute Low

This is the rate of new half-open sessions 

that causes the firewall to stop deleting half-

open sessions. The P-660HWP-Dx continues 

to delete half-open sessions as necessary, 

until the rate of new connection attempts 

drops below this number.

80 existing half-open sessions.

One Minute High

This is the rate of new half-open sessions 

that causes the firewall to start deleting half-

open sessions. When the rate of new 

connection attempts rises above this number, 

the P-660HWP-Dx deletes half-open 

sessions as required to accommodate new 

connection attempts.

100 half-open sessions per 

minute. The above numbers cause 

the P-660HWP-Dx to start deleting 

half-open sessions when more 

than 100 session establishment 

attempts have been detected in 

the last minute, and to stop 

deleting half-open sessions when 

fewer than 80 session 

establishment attempts have been 

detected in the last minute.

Maximum 

Incomplete Low

This is the number of existing half-open 

sessions that causes the firewall to stop 

deleting half-open sessions. The P-660HWP-

Dx continues to delete half-open requests as 

necessary, until the number of existing half-

open sessions drops below this number.

80 existing half-open sessions.