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How to Create a Connection Filtering Rule

 

Topic Last Modified: 2007-01-19

This topic includes a procedure for creating a connection filtering rule, and one for configuring a return status code on a new or existing connection filtering rule.

  1. Start System Manager: On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.

  2. Double-click Global Settings.

  3. Right-click Message Delivery, and then click Properties.

  4. Click the Connection Filtering tab, and then click Add.

  5. In the Display Name box, type a name for the connection filter.

  6. In the DNS Suffix of Provider box, type the DNS suffix that your provider appends to the IP address.

  7. In the Custom Error Message to Return (default error message will be used if left blank) box, if you want, type a custom error to return to the sender. Leave this field blank to return the default message. The default message is:

    <Connecting IP Address> has been blocked by <name of connection filter rule>

    You can use the following variables to generate a custom message:

    • %0 - connecting IP address
    • %1 - name of the connection filter rule
    • %2- the block list provider

    To include a percentage sign (%) in your error message, you must enter %% for the percentage sign to display.

  8. Click Return Status Code to configure the return status codes that you want this rule to filter.

  1. Start System Manager: On the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.

  2. Double-click Global Settings.

  3. Right-click Message Delivery, and then click Properties.

  4. Click the Connection Filtering tab, and then do one of the following:

    • To configure a return status code on a new rule, click Add for a new rule.
    • To configure a return status code on an existing rule, select the rule, and then click Edit.
  5. In Connection Filtering Rule, click Return Status Code.

  6. Select one of the following options:

    • Click Match Filter Rule to Any Return Code (this connection filter rule is matched to any return status code received from the provider service) to match all return codes with the rule. If an IP address is found on any list, the block list provider service sends a return code, and the filter rule blocks the IP address. This is the default setting.
    • Click Match Filter Rule to the Following Mask (this connection filter rule is matched to return status codes received from the provider service by using a mask to interpret them) to enter a mask to interpret the return status codes from the block list provider service. Check with your block list provider service to determine the conventions used in the block list provider's masks.
      noteNote:
      Remember that a mask checks only against a single value. If you set a mask value that is returned when an IP address appears on two lists, the mask will match only the IP settings that satisfy both settings. To check for either of these two settings, enter the status code for these settings.
    • Click Match Filter Rule to Any of the Following Responses (this connection filter rule is matched to return status codes received from the provider service by using the specific values of the return status codes below) if you want the filter rule to match one of multiple return status codes. For each return status code you want the rule to match, click Add, type the return status code, and then click OK.
  7. Click OK.

 
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