Using CIDR Notation In IBM Domino Configuration

There are multiple resources that suggest CIDR Notation may be used in an IBM Domino server’s Configuration. For instance, IP address filter for SMTP inbound connection controls and CIDR address not working on AS400. However, in ALL of my testing, I’ve NEVER seen it work.

The ugly work-around is to convert the CIDR into a format that IS accepted. One shortcut is to use this excellent tool to convert CIDR to IP Ranges: CIDR TO IP RANGES CONVERTER.

Once you have the range, you’ll still need to “manually” format it.

For instance, use the values displayed in the IBM column to represent the CIDR in the first column:

CIDR IBM [] [] [] [] [23.103.160-175.*] [23.103.224-255.*] [40.96-103.*.*] [40.104-105.*.*] [] [111.221.112-119.*] [] [132.245.*.*] [134.170.68-69.*] [] [] [] [157.56.232-239.*] [157.56.240-255.*] [191.232.96-127.*] [] [191.234.140-143.*] [191.234.224-227.*] [] [206.191.224-255.*] [] []