Simplify iptables

ansible/roles/network/templates/rules.v4.j2

@@ -1,41 +1,8 @@
-# WARNING!! When rules.{v4,v6} are changed, the whole iptables configuration is reloaded.
-# This creates issues with Docker, which injects its own configuration in iptables when it starts.
-# In practice, most (all?) containers will break if rules.{v4,v6} are changed,
-# and docker will have to be restared.
-
-
 *filter
 :INPUT DROP [0:0]
 :FORWARD DROP [0:0]
 :OUTPUT ACCEPT [0:0]
 
-# DNS
--A INPUT -p udp  --dport 53 -j ACCEPT
--A INPUT -p tcp  --dport 53 -j ACCEPT
-
-# Email
--A INPUT -p tcp  --dport 993 -j ACCEPT
--A INPUT -p tcp  --dport 25 -j ACCEPT
--A INPUT -p tcp  --dport 465 -j ACCEPT
--A INPUT -p tcp  --dport 587 -j ACCEPT
-
-# Old SSH configuration
--A INPUT -p tcp  --dport 110 -j ACCEPT
-
-# New SSH configuration
--A INPUT -p tcp  --dport 22 -j ACCEPT
-
-# LDAP
--A INPUT -p tcp  --dport 389 -j ACCEPT
-
-# Web
--A INPUT -p tcp  --dport 80 -j ACCEPT
--A INPUT -p tcp  --dport 443 -j ACCEPT
-
-# Jitsi
--A INPUT -p tcp  --dport 8080 -j ACCEPT
--A INPUT -p udp  --dport 10000 -j ACCEPT
-
 # Cluster
 -A INPUT -s 192.168.1.254 -j ACCEPT # router
 {% for selected_host in groups['cluster_nodes'] %}
@@ -52,7 +19,6 @@
 
 COMMIT
 
-
 *nat
 :PREROUTING ACCEPT [0:0]
 :INPUT ACCEPT [0:0]
@@ -70,5 +36,3 @@ COMMIT
 :POSTROUTING ACCEPT [0:0]
 
 COMMIT
-
-