Additionally, if what
rang_shah_18 said did not help, you could try allowing the port in your firewall settings. If the anti-malware software blocked the port, this should unblock it and allow you to connect again. To do this (if you're on Windows), go to Control Panel > Windows Firewall > Advanced Settings. You do need administrator privileges for this, by the way. Next, click on Inbound Rules, and select New Rule. Choose "Port" from the list that appears, and hit next. Leave the default option for the first one (should be TCP), and select "Specific local ports". Put in the port (10106), and hit next. Allow the connection, and leave all of the options on the next page checked. Finally, pick a name for the rule (preferably something that will remind you what it is, but it can be anything), and add a description (optional).
If you're on Mac, it will obviously be something different, and for that you'll have to do some google searching.