ZyXEL P-660HW-T1 v2 User Guide - Page 169
P-660HW-T v2 User's Guide, Firewall Configuration, Firewall: Threshold continued
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P-660HW-T v2 User's Guide Table 59 Firewall: Threshold (continued) LABEL DESCRIPTION DEFAULT VALUES 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. Maximum Incomplete High This is the number of existing half-open sessions that causes the firewall to start deleting half-open sessions. When the number of existing half-open sessions rises above this number, the ZyXEL Device deletes half-open sessions as required to accommodate new connection requests. Do not set Maximum Incomplete High to lower than the current Maximum Incomplete Low number. 100 existing half-open sessions. The above values causes the ZyXEL Device to start deleting halfopen sessions when the number of existing half-open sessions rises above 100, and to stop deleting half-open sessions with the number of existing half-open sessions drops below 80. TCP Maximum Incomplete This is the number of existing half-open TCP sessions with the same destination host IP address that causes the firewall to start dropping half-open sessions to that same destination host IP address. Enter a number between 1 and 256. As a general rule, you should choose a smaller number for a smaller network, a slower system or limited bandwidth. 30 existing half-open TCP sessions. Action taken when the TCP Maximum Incomplete threshold is reached. Delete the oldest half open session when new connection request comes Select this radio button to clear the oldest half open session when a new connection request comes. Deny new connection request for Select this radio button and specify for how long the ZyXEL Device should block new connection requests when TCP Maximum Incomplete is reached. Enter the length of blocking time in minutes (between 1 and 256). Apply Click Apply to save your changes to the ZyXEL Device. Cancel Click Cancel to begin configuring this screen afresh. Chapter 10 Firewall Configuration 169