diff --git a/plugins/post_analysis/anonymize_ip.py b/plugins/post_analysis/anonymize_ip.py
new file mode 100644
index 0000000..34484f4
--- /dev/null
+++ b/plugins/post_analysis/anonymize_ip.py
@@ -0,0 +1,59 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright Grégory Soutadé 2022
+
+# This file is part of iwla
+
+# iwla is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# iwla is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with iwla.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+import hashlib
+
+from iwla import IWLA
+from iplugin import IPlugin
+
+"""
+Post analysis hook
+
+Replace remote_addr by a SHA1
+
+Plugin requirements :
+    None
+
+Conf values needed :
+    None
+
+Output files :
+    None
+
+Statistics creation :
+    None
+
+Statistics update :
+valid_visitors:
+   remote_addr
+
+Statistics deletion :
+    None
+"""
+
+class IWLAPostAnalysisReverseDNS(IPlugin):
+        
+    def hook(self):
+        hits = self.iwla.getCurrentVisits()
+        for (k, hit) in hits.items():
+            m = hashlib.sha1()
+            m.update(k.encode('utf-8'))
+            hit['remote_addr'] = m.hexdigest()[:16]
+