Glad to hear you got it up and running!
One final silly question.
While following a guide for setting up pfblocker I have created an alias pfB_DNSBLIP.
I have no idea what it is but it has the black down arrow indicating there are no rules for the alias.
Can anyone shed any light on this?
The DNSBL service is used to block domain names only (www.example.com) and not IP addresses (xxx.xxx.xxx.xxx). Sometimes the DNSBL feeds that you set up may contain IP addresses. The pfB_DNSBLIP ailas filters out the IP addresses that are in the DNSBL feeds, thereby creating an alias which can be used by the firewall to act on the IP addresses that show up in the DNSBL feeds. You still need to apply the firewall rules that will use the pfB_DNSBLIP alias. You can create thoses rules in pfSense at "Firewall/pfBlockerNG/DNSBL/DNSBL IP Firewall Rule Settings"
If you go to the pfB_DNSBLIP alias rule and then hover over the alias you should not see any IP addresses in the list that pops up. The black down arrow indicates that the alias currently does not contain any IP addresses and there is nothing for the rule to act against. This will most likely change as you add additional DNSBL feeds.