From f9b6485f2271f6bacb6854a494a7aa9b20e4f546 Mon Sep 17 00:00:00 2001
From: Adam Cooke <me@adamcooke.io>
Date: Fri, 5 May 2017 11:27:33 +0100
Subject: [PATCH] a little extra thing for iptables

---
 script/install/ubuntu1604.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/script/install/ubuntu1604.sh b/script/install/ubuntu1604.sh
index 715df84..9415264 100644
--- a/script/install/ubuntu1604.sh
+++ b/script/install/ubuntu1604.sh
@@ -67,6 +67,13 @@ mkdir /etc/nginx/ssl/
 openssl req -x509 -newkey rsa:4096 -keyout /etc/nginx/ssl/postal.key -out /etc/nginx/ssl/postal.crt -days 365 -nodes -subj "/C=GB/ST=Example/L=Example/O=Example/CN=example.com"
 service nginx reload
 
+#
+# Configure SMTP on port 25
+#
+iptables -t nat -A PREROUTING -p tcp --dport 25 -j REDIRECT --to-port 2525
+iptables -t nat -A OUTPUT -o lo -p tcp --dport 25 -j REDIRECT --to-port 2525
+iptables -I INPUT -p tcp -m tcp --dport 2525 -j ACCEPT
+
 #
 # All done
 #