diff --git a/core/tabs/security/tab_data.toml b/core/tabs/security/tab_data.toml
index 34de8174..3bab8ce6 100644
--- a/core/tabs/security/tab_data.toml
+++ b/core/tabs/security/tab_data.toml
@@ -5,3 +5,8 @@ name = "Firewall Baselines (CTT)"
 description = "Developed to ease iptables firewall configuration, UFW provides a user friendly way to create an IPv4 or IPv6 host-based firewall.\nThis command installs UFW and configures UFW based on CTT's recommended rules.\nFor more information visit: https://christitus.com/linux-security-mistakes"
 script = "firewall-baselines.sh"
 task_list = "I SS"
+
+[[data.preconditions]]
+matches = false
+data = "command_exists"
+values = [ "firewalld" ]