From 47e5357e799a95c8cf4f86e64be44094a1539e75 Mon Sep 17 00:00:00 2001
From: Edwin Lyon <53972157+practical-engelbart@users.noreply.github.com>
Date: Sun, 25 Oct 2020 12:14:13 -0700
Subject: [PATCH] Update rules4.conf

---
 iptables/rules4.conf | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/iptables/rules4.conf b/iptables/rules4.conf
index ca650ba..641dc33 100644
--- a/iptables/rules4.conf
+++ b/iptables/rules4.conf
@@ -6,9 +6,9 @@
 :FILTERS - [0:0]
 -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
 -A INPUT -i lo -j ACCEPT
--A INPUT -i wg0 -m conntrack --ctstate NEW -j ACCEPT
 -A INPUT -p icmp -m icmp --icmp-type 8 -m limit --limit 5/sec -j ACCEPT
 -A INPUT -m conntrack --ctstate INVALID -j DROP
+-A INPUT -i wg0 -m conntrack --ctstate NEW -j ACCEPT
 -A INPUT -j FILTERS
 -A INPUT -j REJECT
 -A OUTPUT -o lo -j ACCEPT
@@ -16,23 +16,22 @@
 -A OUTPUT -o wg0 -j ACCEPT
 -A DOCKER-USER -i ens3 -j FILTERS
 -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
--A FORWARD -i wg0 -j ACCEPT
--A FORWARD -o wg0 -j ACCEPT
 -A FORWARD -m conntrack --ctstate INVALD -j DROP
+-A FORARD -i wg0 -o wg0 -m conntrack --ctstate NEW -j ACCEPT
 -A FORWARD -j REJECT
 -A FILTERS -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 25 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 80 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 110 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 143 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 443 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 465 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 587 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 993 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 995 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 4190 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p tcp --dport 8448 -j ACCEPT
--A FILTERS -m conntrack --ctstate NEW -p udp --dport 51820 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 25 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 80 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 110 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 143 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 443 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 465 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 587 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 993 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 995 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 4190 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p tcp --syn --dport 8448 -j ACCEPT
+-A FILTERS -m conntrack --ctstate NEW -p udp --syn --dport 51820 -j ACCEPT
 -A FILTERS -m conntrack --ctstate INVALID -j DROP
 -A FILTERS -j REJECT
 COMMIT
@@ -44,4 +43,3 @@ COMMIT
 :POSTROUTING ACCEPT [0:0]
 -A POSTROUTING -o ens3 -j MASQUERADE
 COMMIT
-