ZyXEL P-660H-T3 v2 User Guide - Page 142
Table 45
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Chapter 9 Firewall Configuration Figure 74 Firewall: Threshold The following table describes the labels in this screen. Table 45 Firewall: Threshold LABEL DESCRIPTION DEFAULT VALUES Denial of Service Thresholds One Minute Low This is the rate of new half-open sessions that causes the firewall to stop deleting halfopen sessions. The ZyXEL Device 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 halfopen sessions. When the rate of new connection attempts rises above this number, the ZyXEL Device deletes half-open sessions as required to accommodate new connection attempts. 100 half-open sessions per minute. The above numbers cause the ZyXEL Device 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 ZyXEL Device 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. 142 P-660H-Tx v2 User's Guide