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Session Limit

The devices support zone-based session limit function. You can limit the number of sessions and control the session rate to the source IP address, destination IP address, specified IP address, applications or role/user/user group, thereby protecting from DoS attacks and controlling the bandwidth of applications, such as IM or P2P.

Configuring a Session Limit Rule

To configure a session limit rule, take the following steps:

  1. Select Policy > Session Limit.
  2. Click New. The Session Limit Configuration dialog box will appear.
  3. Select the zone where the session limit rule is located.
  4. Click OK to save your settings.
  5. Click Switch Mode to select a matching mode. If you select Use the Minimum Value and an IP address matches multiple session limit rules, the maximum number of sessions of this IP address is limited to the minimum number of sessions of all matched session limit rules; if you select Use the Maximum Value and an IP address matches multiple session limit rules, the maximum number of sessions of this IP address is the maximum number of sessions of all matched session limit rlules.

Clearing Statistic Information

After configuring a session limit rule, the sessions which exceed the maximum number of sessions will be dropped. You can clear the statistical information of the dropped sessions of specified session limit rule according to your need.

To clear statistic information, take the following steps:

  1. Select Policy > Session Limit.
  2. Select the rule whose session's statistical information you want to clear.

  3. Click Clear.