ZyXEL P-792H v2 User Guide - Page 131
Configuring Firewall Thresholds
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Chapter 9 Firewalls • If you often use P2P applications such as file sharing with eMule or eDonkey, it's recommended that you increase the threshold values since lots of sessions will be established during a small period of time and the P-792H v2 may classify them as DoS attacks. 9.4.2 Configuring Firewall Thresholds The P-792H v2 also sends alerts whenever TCP Maximum Incomplete is exceeded. The global values specified for the threshold and timeout apply to all TCP connections. Click Firewall > Threshold to bring up the next screen. Figure 56 Security > Firewall > Threshold The following table describes the labels in this screen. Table 36 Security > Firewall > Threshold LABEL DESCRIPTION Denial of Service Thresholds The P-792H v2 measures both the total number of existing half-open sessions and the rate of session establishment attempts. Both TCP and UDP half-open sessions are counted in the total number and rate measurements. Measurements are made once a minute. One Minute Low This is the rate of new half-open sessions per minute that causes the firewall to stop deleting half-open sessions. The P-792H v2 continues to delete half-open sessions as necessary, until the rate of new connection attempts drops below this number. P-792H v2 User's Guide 131