Example: Access Control rules for the SMTP Receiving module
Service Level
Use the options under Service Level to specify a set of rules for allowing specific IP addresses on the currently configured service. To edit/delete any of the already defined rules hit their corresponding Edit or Delete buttons, on the right hand side of the listener. To add a new rule use the Add Rule button..png)
Editing or adding a new rule will result in displaying the same configuration fields: the action to be taken for connections made through the configured parameter (choose between allowing or denying them the access) and the type of the connections the specified action will apply to (connections from single IP, an entire IP range, or Network/Mask).
Use the drop-down menus to select the allowed/denied connections and fill in the corresponding IP values. To enable the newly-configured rule check the box in front of the Enable this rule option, then hit the Save rule button.
Further use the up and down arrows (next to the Delete button) to set priorities between the rules and click the Flow Control button in order to enforce global access limitations to the rule, using the same options as the ones described in the section below. All TCP services have created by default a rule allowing any IP address.
Flow Control
Within the Flow Control section you can enforce global access limitations to this listener by setting the maximum number of: simultaneous connections, concurrent connections from each remote IP address, new connections to the listener made in a defined time period and maximum connections from each remote IP address in a defined time interval. The default time interval is set to 1 minute.
Use the up and down arrows and drop-down menus to specify the desired parameters and values.
Note:
- You can also find the same configuration options in the Access Control section of the Configuring General Parameters page; the first out of the two pages available when wishing to make the editing or the advanced configuration of a listener.
After making the configurations hit the Save Configuration button to preserve your changes.