Pi-Hole Blocking via Regex

BLOCKINGREGEX=^ab.+\.com$

will block all domains that start with “ab” (^ab), have at least one further character (.+) and end in “.com” (\.com$).
Examples for what would be blocked by this rule:

• abc.com
• abtest.com
• ab.test.com
• abr-------.whatever.com

Examples for what would notbe blocked by this rule:

• testab.com (the domain doesn’t start with “ab”)
• tab.test.com (the domain doesn’t start with “ab”)
• ab.com (there is no character in between “ab” and “.com”)
• test.com.something (the domain doesn’t end in “.com”)

(^|\.)ru$

will block the entire TLD .(.ru). Examples for what would be blocked by this rule:

• abc.ru