From 754ef34acbd730d6d6f1446d3309452e16de0ebd Mon Sep 17 00:00:00 2001
From: Matthias Bertschy <matthias.bertschy@gmail.com>
Date: Wed, 30 Aug 2017 21:26:29 +0200
Subject: [PATCH] Add support for ! in parameters (#25891)

Fixes #25684
---
 lib/ansible/modules/system/iptables.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/ansible/modules/system/iptables.py b/lib/ansible/modules/system/iptables.py
index a5725cde65f..dbdd9a9823a 100644
--- a/lib/ansible/modules/system/iptables.py
+++ b/lib/ansible/modules/system/iptables.py
@@ -365,7 +365,10 @@ def append_param(rule, param, flag, is_list):
             append_param(rule, item, flag, False)
     else:
         if param is not None:
-            rule.extend([flag, param])
+            if param[0] == '!':
+                rule.extend(['!', flag, param[1:]])
+            else:
+                rule.extend([flag, param])
 
 def append_tcp_flags(rule, param, flag):
     if param: