To enable IP banning, you must uncomment the following line in the communityserver.config file:
<!--<add name = "IPBanning" type = "CommunityServer.IPBanning.Components.IPBanningModule, CommunityServer.IPBanning" />-->
The modified line should look like this:
<add name = "IPBanning" type = "CommunityServer.IPBanning.Components.IPBanningModule, CommunityServer.IPBanning" />
Click here for information about how to use the administrative Control Panel to ban an IP address.