Warn user if using "securityonion" as hostname

setup/so-whiptail

@@ -28,6 +28,14 @@ whiptail_airgap() {
 	whiptail_check_exitstatus $exitstatus
 }
 
+whiptail_avoid_default_hostname() {
+	[ -n "$TESTING" ] && return
+
+	whiptail --title "Security Onion Setup" \
+		--yesno "We suggest avoiding the default hostname of 'securityonion' in a distributed environment." 8 75 \
+		--yes-button "Use" --no-button "Change" --defaultno
+}
+
 whiptail_basic_suri() {
 
 	[ -n "$TESTING" ] && return