core iptables revision

2 files changed, 364 insertions, 140 deletions

diff --git a/core/conf/iptables/iptables-lan.sh b/core/conf/iptables/iptables-lan.sh
new file mode 100644
index 0000000..fae7345
--- /dev/null
+++ b/core/conf/iptables/iptables-lan.sh
@@ -0,0 +1,277 @@
+#!/bin/sh
+
+#------------------------------------------------------------------------------
+#
+# File: iptables_mint17.sh
+#
+# http://www.hardenedlinux.org
+#
+# Reference: Ruslan Abuzant <ruslan@abuzant.com>,  http://www.hackersgarage.com/
+# Changed by: Silvino Silva <silvino@bk.ru>
+#
+# License: GNU GPL (version 2, or any later version).
+#
+# Configuration.
+#------------------------------------------------------------------------------
+
+# For debugging use iptables -v.
+IPTABLES="/usr/sbin/iptables"
+IP6TABLES="/usr/sbin/ip6tables"
+MODPROBE="/sbin/modprobe"
+RMMOD="/sbin/rmmod"
+ARP="/usr/sbin/arp"
+
+# NIC interfaces
+NIC_NAME="enp8s0 wlp7s0"
+
+# Logging options.
+#------------------------------------------------------------------------------
+LOG="LOG --log-level debug --log-tcp-sequence --log-tcp-options"
+LOG="$LOG --log-ip-options"
+
+
+# Defaults for rate limiting
+#------------------------------------------------------------------------------
+RLIMIT="-m limit --limit 3/s --limit-burst 8"
+
+
+# Unprivileged ports.
+#------------------------------------------------------------------------------
+PHIGH="1024:65535"
+PSSH="1000:1023"
+
+
+# Load required kernel modules
+#------------------------------------------------------------------------------
+$MODPROBE ip_conntrack_ftp
+$MODPROBE ip_conntrack_irc
+
+
+# Mitigate ARP spoofing/poisoning and similar attacks.
+#------------------------------------------------------------------------------
+# Hardcode static ARP cache entries here
+# $ARP -s IP-ADDRESS MAC-ADDRESS
+
+
+# Default policies.
+#------------------------------------------------------------------------------
+
+# Drop everything by default.
+$IPTABLES -P INPUT DROP
+$IPTABLES -P FORWARD DROP
+$IPTABLES -P OUTPUT ACCEPT
+
+# Set the nat/mangle/raw tables' chains to ACCEPT
+
+$IPTABLES -t mangle -P PREROUTING ACCEPT
+$IPTABLES -t mangle -P INPUT ACCEPT
+$IPTABLES -t mangle -P FORWARD ACCEPT
+$IPTABLES -t mangle -P OUTPUT ACCEPT
+$IPTABLES -t mangle -P POSTROUTING ACCEPT
+
+# Cleanup.
+#------------------------------------------------------------------------------
+
+# Delete all
+$IPTABLES -F
+$IPTABLES -t mangle -F
+
+# Delete all
+$IPTABLES -X
+$IPTABLES -t mangle -X
+
+# Zero all packets and counters.
+$IPTABLES -Z
+$IPTABLES -t mangle -Z
+
+# Completely disable IPv6.
+#------------------------------------------------------------------------------
+
+# Block all IPv6 traffic
+# If the ip6tables command is available, try to block all IPv6 traffic.
+if test -x $IP6TABLES; then
+# Set the default policies
+# drop everything
+$IP6TABLES -P INPUT DROP 2>/dev/null
+$IP6TABLES -P FORWARD DROP 2>/dev/null
+$IP6TABLES -P OUTPUT DROP 2>/dev/null
+
+# The mangle table can pass everything
+$IP6TABLES -t mangle -P PREROUTING ACCEPT 2>/dev/null
+$IP6TABLES -t mangle -P INPUT ACCEPT 2>/dev/null
+$IP6TABLES -t mangle -P FORWARD ACCEPT 2>/dev/null
+$IP6TABLES -t mangle -P OUTPUT ACCEPT 2>/dev/null
+$IP6TABLES -t mangle -P POSTROUTING ACCEPT 2>/dev/null
+
+# Delete all rules.
+$IP6TABLES -F 2>/dev/null
+$IP6TABLES -t mangle -F 2>/dev/null
+
+# Delete all chains.
+$IP6TABLES -X 2>/dev/null
+$IP6TABLES -t mangle -X 2>/dev/null
+
+# Zero all packets and counters.
+$IP6TABLES -Z 2>/dev/null
+$IP6TABLES -t mangle -Z 2>/dev/null
+fi
+
+# Custom user-defined chains.
+#------------------------------------------------------------------------------
+
+# LOG packets, then ACCEPT.
+$IPTABLES -N ACCEPTLOG
+$IPTABLES -A ACCEPTLOG -j $LOG $RLIMIT --log-prefix "ACCEPT "
+$IPTABLES -A ACCEPTLOG -j ACCEPT
+
+# LOG packets, then DROP.
+$IPTABLES -N DROPLOG
+$IPTABLES -A DROPLOG -j $LOG $RLIMIT --log-prefix "DROP "
+$IPTABLES -A DROPLOG -j DROP
+
+# LOG packets, then REJECT.
+# TCP packets are rejected with a TCP reset.
+$IPTABLES -N REJECTLOG
+$IPTABLES -A REJECTLOG -j $LOG $RLIMIT --log-prefix "REJECT "
+$IPTABLES -A REJECTLOG -p tcp -j REJECT --reject-with tcp-reset
+$IPTABLES -A REJECTLOG -j REJECT
+
+# Only allows RELATED ICMP types
+# (destination-unreachable, time-exceeded, and parameter-problem).
+# TODO: Rate-limit this traffic?
+# TODO: Allow fragmentation-needed?
+# TODO: Test.
+$IPTABLES -N RELATED_ICMP
+$IPTABLES -A RELATED_ICMP -p icmp --icmp-type destination-unreachable -j ACCEPT
+$IPTABLES -A RELATED_ICMP -p icmp --icmp-type time-exceeded -j ACCEPT
+$IPTABLES -A RELATED_ICMP -p icmp --icmp-type parameter-problem -j ACCEPT
+$IPTABLES -A RELATED_ICMP -j DROPLOG
+
+# Make It Even Harder To Multi-PING
+$IPTABLES  -A INPUT -p icmp -m limit --limit 1/s --limit-burst 2 -j ACCEPT
+$IPTABLES  -A INPUT -p icmp -m limit --limit 1/s --limit-burst 2 -j LOG --log-prefix PING-DROP:
+$IPTABLES  -A INPUT -p icmp -j DROP
+$IPTABLES  -A OUTPUT -p icmp -j ACCEPT
+
+# Only allow the minimally required/recommended parts of ICMP. Block the rest.
+#------------------------------------------------------------------------------
+
+# TODO: This section needs a lot of testing!
+
+# First, drop all fragmented ICMP packets (almost always malicious).
+$IPTABLES -A INPUT -p icmp --fragment -j DROPLOG
+$IPTABLES -A OUTPUT -p icmp --fragment -j DROPLOG
+$IPTABLES -A FORWARD -p icmp --fragment -j DROPLOG
+
+# Allow all ESTABLISHED ICMP traffic.
+$IPTABLES -A INPUT -p icmp -m state --state ESTABLISHED -j ACCEPT $RLIMIT
+$IPTABLES -A OUTPUT -p icmp -m state --state ESTABLISHED -j ACCEPT $RLIMIT
+
+# Allow some parts of the RELATED ICMP traffic, block the rest.
+$IPTABLES -A INPUT -p icmp -m state --state RELATED -j RELATED_ICMP $RLIMIT
+$IPTABLES -A OUTPUT -p icmp -m state --state RELATED -j RELATED_ICMP $RLIMIT
+
+# Allow incoming ICMP echo requests (ping), but only rate-limited.
+$IPTABLES -A INPUT -p icmp --icmp-type echo-request -j ACCEPT $RLIMIT
+
+# Allow outgoing ICMP echo requests (ping), but only rate-limited.
+$IPTABLES -A OUTPUT -p icmp --icmp-type echo-request -j ACCEPT $RLIMIT
+
+# Drop any other ICMP traffic.
+$IPTABLES -A INPUT -p icmp -j DROPLOG
+$IPTABLES -A OUTPUT -p icmp -j DROPLOG
+$IPTABLES -A FORWARD -p icmp -j DROPLOG
+
+# Selectively allow certain special types of traffic.
+#------------------------------------------------------------------------------
+
+# Allow loopback interface to do anything.
+$IPTABLES -A INPUT -i lo -j ACCEPT
+$IPTABLES -A OUTPUT -o lo -j ACCEPT
+
+# Allow incoming connections related to existing allowed connections.
+$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
+
+# Allow outgoing connections EXCEPT invalid
+$IPTABLES -A OUTPUT -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
+
+# Miscellaneous.
+#------------------------------------------------------------------------------
+
+# We don't care about Milkosoft, Drop SMB/CIFS/etc..
+#                     ^ person before me; my label = psychogreedyevilsoft
+$IPTABLES -A INPUT -p tcp -m multiport --dports 135,137,138,139,445,1433,1434 -j DROP
+$IPTABLES -A INPUT -p udp -m multiport --dports 135,137,138,139,445,1433,1434 -j DROP
+
+# Explicitly drop invalid incoming traffic
+$IPTABLES -A INPUT -m state --state INVALID -j DROP
+
+# Drop invalid outgoing traffic, too.
+$IPTABLES -A OUTPUT -m state --state INVALID -j DROP
+
+# If we would use NAT, INVALID packets would pass - BLOCK them anyways
+$IPTABLES -A FORWARD -m state --state INVALID -j DROP
+
+# PORT Scanners (stealth also)
+$IPTABLES -A INPUT -m state --state NEW -p tcp --tcp-flags ALL ALL -j DROP
+$IPTABLES -A INPUT -m state --state NEW -p tcp --tcp-flags ALL NONE -j DROP
+
+# TODO: Some more anti-spoofing rules? For example:
+$IPTABLES -A INPUT -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
+$IPTABLES -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
+$IPTABLES -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -j DROPLOG
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -j DROPLOG
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j DROPLOG
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j DROPLOG
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -j DROPLOG
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags FIN,ACK FIN -j DROPLOG
+$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,ACK,URG -j DROPLOG
+
+$IPTABLES -N SYN_FLOOD
+$IPTABLES -A INPUT -p tcp --syn -j SYN_FLOOD
+$IPTABLES -A SYN_FLOOD -m limit --limit 2/s --limit-burst 6 -j RETURN
+
+$IPTABLES -A SYN_FLOOD -j DROP
+
+$IPTABLES -A INPUT -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop sync: " --log-level 7
+$IPTABLES -A INPUT -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -j DROP
+
+$IPTABLES -A INPUT -f -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop frag: "
+$IPTABLES -A INPUT -f -j DROP
+
+
+# TODO: ICQ, MSN, GTalk, Skype, Yahoo, etc...
+
+# Selectively allow certain inbound connections, block the rest.
+#------------------------------------------------------------------------------
+
+# Allow incoming SSH requests.
+$IPTABLES -A INPUT -m state --state NEW -p tcp --dport 22 -j ACCEPT
+
+# Explicitly log and reject everything else.
+#------------------------------------------------------------------------------
+# Use REJECT instead of REJECTLOG if you don't need/want logging.
+$IPTABLES -A INPUT -j REJECTLOG
+$IPTABLES -A OUTPUT -j REJECTLOG
+$IPTABLES -A FORWARD -j REJECTLOG
+
+# Counter hits
+
+for i in $NIC_NAME
+do
+	iptables -I INPUT -p tcp -m multiport --dports 22 -i $i -m state --state NEW -m recent --set
+	iptables -I INPUT -p tcp -m multiport --dports 22 -i $i -m state --state NEW -m recent --update --seconds 50 --hitcount 3 -j DROP
+done
+
+#------------------------------------------------------------------------------
+# Testing the firewall.
+#------------------------------------------------------------------------------
+
+# You should check/test that the firewall really works, using
+# iptables -vnL, nmap, ping, telnet, ...
+
+# Exit gracefully.
+#------------------------------------------------------------------------------
+
+    exit 0
diff --git a/core/conf/iptables/rules.v4 b/core/conf/iptables/rules.v4
index 419962f..5a2ffe8 100644
--- a/core/conf/iptables/rules.v4
+++ b/core/conf/iptables/rules.v4
@@ -1,158 +1,105 @@
-# Generated by iptables-save v1.6.0 on Sat Oct 15 17:20:41 2016
+# Generated by iptables-save v1.6.1 on Tue Feb 21 13:55:04 2017
 *security
-:INPUT ACCEPT [6:2056]
+:INPUT ACCEPT [3624:2121853]
 :FORWARD ACCEPT [0:0]
-:OUTPUT ACCEPT [6:2056]
+:OUTPUT ACCEPT [3590:999020]
 COMMIT
-# Completed on Sat Oct 15 17:20:41 2016
-# Generated by iptables-save v1.6.0 on Sat Oct 15 17:20:41 2016
+# Completed on Tue Feb 21 13:55:04 2017
+# Generated by iptables-save v1.6.1 on Tue Feb 21 13:55:04 2017
 *raw
-:PREROUTING ACCEPT [7:2092]
-:OUTPUT ACCEPT [6:2056]
+:PREROUTING ACCEPT [5432:2268406]
+:OUTPUT ACCEPT [3623:1011362]
 COMMIT
-# Completed on Sat Oct 15 17:20:41 2016
-# Generated by iptables-save v1.6.0 on Sat Oct 15 17:20:41 2016
+# Completed on Tue Feb 21 13:55:04 2017
+# Generated by iptables-save v1.6.1 on Tue Feb 21 13:55:04 2017
+*nat
+:PREROUTING ACCEPT [1808:146553]
+:INPUT ACCEPT [0:0]
+:OUTPUT ACCEPT [322:28410]
+:POSTROUTING ACCEPT [289:16068]
+COMMIT
+# Completed on Tue Feb 21 13:55:04 2017
+# Generated by iptables-save v1.6.1 on Tue Feb 21 13:55:04 2017
 *mangle
-:PREROUTING ACCEPT [7:2092]
-:INPUT ACCEPT [6:2056]
+:PREROUTING ACCEPT [0:0]
+:INPUT ACCEPT [0:0]
 :FORWARD ACCEPT [0:0]
-:OUTPUT ACCEPT [6:2056]
-:POSTROUTING ACCEPT [6:2056]
+:OUTPUT ACCEPT [0:0]
+:POSTROUTING ACCEPT [0:0]
 COMMIT
-# Completed on Sat Oct 15 17:20:41 2016
-# Generated by iptables-save v1.6.0 on Sat Oct 15 17:20:41 2016
+# Completed on Tue Feb 21 13:55:04 2017
+# Generated by iptables-save v1.6.1 on Tue Feb 21 13:55:04 2017
 *filter
 :INPUT DROP [0:0]
 :FORWARD DROP [0:0]
-:OUTPUT DROP [0:0]
+:OUTPUT ACCEPT [0:0]
+:ACCEPTLOG - [0:0]
+:DROPLOG - [0:0]
+:REJECTLOG - [0:0]
+:RELATED_ICMP - [0:0]
+:SYN_FLOOD - [0:0]
+-A INPUT -i wlp7s0 -p tcp -m multiport --dports 22 -m state --state NEW -m recent --update --seconds 50 --hitcount 3 --name DEFAULT --mask 255.255.255.255 --rsource -j DROP
+-A INPUT -i wlp7s0 -p tcp -m multiport --dports 22 -m state --state NEW -m recent --set --name DEFAULT --mask 255.255.255.255 --rsource
+-A INPUT -i enp8s0 -p tcp -m multiport --dports 22 -m state --state NEW -m recent --update --seconds 50 --hitcount 3 --name DEFAULT --mask 255.255.255.255 --rsource -j DROP
+-A INPUT -i enp8s0 -p tcp -m multiport --dports 22 -m state --state NEW -m recent --set --name DEFAULT --mask 255.255.255.255 --rsource
+-A INPUT -p icmp -m limit --limit 1/sec --limit-burst 2 -j ACCEPT
+-A INPUT -p icmp -m limit --limit 1/sec --limit-burst 2 -j LOG --log-prefix "PING-DROP:"
+-A INPUT -p icmp -j DROP
+-A INPUT -p icmp -f -j DROPLOG
+-A INPUT -p icmp -m state --state ESTABLISHED -m limit --limit 3/sec --limit-burst 8 -j ACCEPT
+-A INPUT -p icmp -m state --state RELATED -m limit --limit 3/sec --limit-burst 8 -j RELATED_ICMP
+-A INPUT -p icmp -m icmp --icmp-type 8 -m limit --limit 3/sec --limit-burst 8 -j ACCEPT
+-A INPUT -p icmp -j DROPLOG
 -A INPUT -i lo -j ACCEPT
--A INPUT -i br0 -j ACCEPT
+-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
+-A INPUT -p tcp -m multiport --dports 135,137,138,139,445,1433,1434 -j DROP
+-A INPUT -p udp -m multiport --dports 135,137,138,139,445,1433,1434 -j DROP
+-A INPUT -m state --state INVALID -j DROP
+-A INPUT -p tcp -m state --state NEW -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -j DROP
+-A INPUT -p tcp -m state --state NEW -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j DROP
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -j DROP
+-A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j DROP
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -j DROP
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags FIN,ACK FIN -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,ACK,URG -j DROPLOG
+-A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -j SYN_FLOOD
 -A INPUT -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop sync: " --log-level 7
 -A INPUT -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -j DROP
 -A INPUT -f -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop frag: "
 -A INPUT -f -j DROP
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -j DROP
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -j DROP
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop null: "
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j DROP
--A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop syn rst syn rs"
--A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j DROP
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop xmas: "
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -j DROP
--A INPUT -p tcp -m tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/min --limit-burst 7 -j LOG --log-prefix "iptables: drop fin scan: "
--A INPUT -p tcp -m tcp --tcp-flags FIN,ACK FIN -j DROP
--A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,ACK,URG -j DROP
-#################################################################################
-#	INPUT
-#	Established connections and passive
-#
-
-# Allow established from dns server
-#-A INPUT -p udp -m udp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# INPUT accept passive
--A INPUT -p tcp -m tcp --sport 1024:65535 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
--A INPUT -p tcp -m tcp --sport 1024:65535 --dport 1024:65535 -m state --state RELATED -j ACCEPT
-
-
-# Allow irc
--A INPUT -p tcp -m tcp --sport 6667 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow xmmp
--A INPUT -p tcp -m tcp --sport 5222 --dport 1024:65535 -m state --state ESTABLISHED,RELATED -j ACCEPT
-# Allow established from https server
--A INPUT -p tcp -m tcp --sport 443 --dport 1024:65535 -m state --state ESTABLISHED,RELATED -j ACCEPT
--A INPUT -p udp -m udp --sport 443 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-
-# Allow established from http server
--A INPUT -p tcp -m tcp --sport 80 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow established from rsync server
--A INPUT -p tcp -m tcp --sport 873 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow established from pop3s server
--A INPUT -p tcp -m tcp --sport 995 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow established from smtps server
--A INPUT -p tcp -m tcp --sport 465 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow established from ntp server
--A INPUT -p udp -m udp --sport 123 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow established from whois server
--A INPUT -p tcp -m tcp --sport 43 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-# Allow established from ftp server
--A INPUT -p tcp -m tcp --sport 20 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
--A INPUT -p tcp -m tcp --sport 21 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
--A INPUT -p tcp -m tcp --sport 22 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-##################################################################################
-#	INPUT
-#	New and established connections to local servers
-#
-
-# INPUT accept from wlp7s0 to dns server
-#-A INPUT -p udp -m udp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
-
-# INPUT accept from wlp7s0 to https server
--A INPUT -p tcp -m tcp --sport 1024:65535 --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
-# INPUT accept from wlp7s0 to ssh server
--A INPUT -p tcp -m tcp --sport 1024:65535 --dport 2222 -m state --state ESTABLISHED -j ACCEPT
--A INPUT -p tcp -m tcp --sport 1024:65535 --dport 2222 -m state --state NEW -m limit --limit 6/min --limit-burst 3 -j ACCEPT
-
-
--A INPUT -j LOG --log-prefix "iptables: INPUT: " --log-level 7
--A FORWARD -j LOG --log-prefix "iptables: FORWARD: " --log-level 7
-
-##################################################################################
-#	Output
-#	Connections to remote servers
-#
+-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
+-A INPUT -j REJECTLOG
+-A FORWARD -p icmp -f -j DROPLOG
+-A FORWARD -p icmp -j DROPLOG
+-A FORWARD -m state --state INVALID -j DROP
+-A FORWARD -j REJECTLOG
+-A OUTPUT -p icmp -j ACCEPT
+-A OUTPUT -p icmp -f -j DROPLOG
+-A OUTPUT -p icmp -m state --state ESTABLISHED -m limit --limit 3/sec --limit-burst 8 -j ACCEPT
+-A OUTPUT -p icmp -m state --state RELATED -m limit --limit 3/sec --limit-burst 8 -j RELATED_ICMP
+-A OUTPUT -p icmp -m icmp --icmp-type 8 -m limit --limit 3/sec --limit-burst 8 -j ACCEPT
+-A OUTPUT -p icmp -j DROPLOG
 -A OUTPUT -o lo -j ACCEPT
--A OUTPUT -o br0 -j ACCEPT
-
-# Allow to ssh clients 
--A OUTPUT -p tcp -m tcp --sport 2222 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-
-# Allow to dns
-#-A OUTPUT -p udp -m udp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow from dns server
-#-A OUTPUT -p udp -m udp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
-
-# Allow irc
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 6667 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow xmmp
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 5222 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
-
-
-# Allow to rsync server
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 873 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow to pop3s server
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 995 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow to smtps server
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 465 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow to ntp server
--A OUTPUT -p udp -m udp --sport 1024:65535 --dport 123 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow to ftp server
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 21 -m state --state NEW,ESTABLISHED -j ACCEPT
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 20 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow to https server
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 443 -m state --state NEW,ESTABLISHED,RELATED -j ACCEPT
--A OUTPUT -p udp -m udp --sport 1024:65535 --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
-# Allow to http server
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
-
-##################################################################################
-#	Output
-#	Connections from local servers
-#
-
-
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 1024:65535 -m state --state RELATED -j ACCEPT
--A OUTPUT -p tcp -m tcp --sport 1024:65535 --dport 1024:65535 -m state --state NEW -j ACCEPT
-
-
--A OUTPUT -j LOG --log-prefix "iptables: OUTPUT: " --log-level 7
-COMMIT
-# Completed on Sat Oct 15 17:20:41 2016
-# Generated by iptables-save v1.6.0 on Sat Oct 15 17:20:41 2016
-*nat
-:PREROUTING ACCEPT [1:36]
-:INPUT ACCEPT [0:0]
-:OUTPUT ACCEPT [0:0]
-:POSTROUTING ACCEPT [0:0]
+-A OUTPUT -m state --state NEW,RELATED,ESTABLISHED -j ACCEPT
+-A OUTPUT -m state --state INVALID -j DROP
+-A OUTPUT -j REJECTLOG
+-A ACCEPTLOG -m limit --limit 3/sec --limit-burst 8 -j LOG --log-prefix "ACCEPT " --log-level 7 --log-tcp-sequence --log-tcp-options --log-ip-options
+-A ACCEPTLOG -j ACCEPT
+-A DROPLOG -m limit --limit 3/sec --limit-burst 8 -j LOG --log-prefix "DROP " --log-level 7 --log-tcp-sequence --log-tcp-options --log-ip-options
+-A DROPLOG -j DROP
+-A REJECTLOG -m limit --limit 3/sec --limit-burst 8 -j LOG --log-prefix "REJECT " --log-level 7 --log-tcp-sequence --log-tcp-options --log-ip-options
+-A REJECTLOG -p tcp -j REJECT --reject-with tcp-reset
+-A REJECTLOG -j REJECT --reject-with icmp-port-unreachable
+-A RELATED_ICMP -p icmp -m icmp --icmp-type 3 -j ACCEPT
+-A RELATED_ICMP -p icmp -m icmp --icmp-type 11 -j ACCEPT
+-A RELATED_ICMP -p icmp -m icmp --icmp-type 12 -j ACCEPT
+-A RELATED_ICMP -j DROPLOG
+-A SYN_FLOOD -m limit --limit 2/sec --limit-burst 6 -j RETURN
+-A SYN_FLOOD -j DROP
 COMMIT
-# Completed on Sat Oct 15 17:20:41 2016
+# Completed on Tue Feb 21 13:55:04 2017