diff --git a/data/Dockerfiles/netfilter/server.py b/data/Dockerfiles/netfilter/server.py
index 0b0e2a41e9..b1a9f3364e 100644
--- a/data/Dockerfiles/netfilter/server.py
+++ b/data/Dockerfiles/netfilter/server.py
@@ -366,6 +366,8 @@ def get_snat4_rule():
           chain.insert_rule(new_rule)
         else:
           for position, rule in enumerate(chain.rules):
+            if not hasattr(rule.target, 'parameter'):
+                continue
             match = all((
               new_rule.get_src() == rule.get_src(),
               new_rule.get_dst() == rule.get_dst(),