Signed-off-by: Stefan Schantl <stefan.schantl(a)ipfire.org>
---
 config/firewall/rules.pl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/config/firewall/rules.pl b/config/firewall/rules.pl
index 83216e78a..57f4809b4 100644
--- a/config/firewall/rules.pl
+++ b/config/firewall/rules.pl
@@ -695,6 +695,9 @@ sub drop_hostile_networks () {
 		return;
 	}
 
+	# Exit if there is no red interface.
+	return unless($RED_DEV);
+
 	# Call function to load the network list of hostile networks.
 	&ipset_restore($HOSTILE_CCODE);
 
-- 
2.30.2