You can specify from which IP addresses EventSentry will accept packets. Please note that hostnames are not allowed in the list, you can only add IP addresses to the list (this is to avoid DNS lookups, also servers generally have static ip addresses anyway).

You can enter IP addresses with or without specifying the subnet bits. For example, if you only want to add two servers with the IP addresses 184.23.22.11 and 184.23.22.43, simply add those two IP addresses to the list.

If you want to allow a whole subnet, for example the IP addresses 184.23.22.1 - 184.23.22.254, then you will have to add 184.23.22.0/24.

If you only want to allow the range 184.23.22.128 - 184.23.22.254 then you can specify 184.23.22.128/25.

This example accepts packets from six

   different hosts, including the localhost

If you are having difficulties determining the subnet mask we recommend you download the (free) Wildpackets IP Calculator or purchase a book about TCP/IP.