network revision

1 files changed, 361 insertions, 0 deletions

diff --git a/tools/scripts/system-iptables.sh b/tools/scripts/system-iptables.sh
new file mode 100644
index 0000000..4ec3b79
--- /dev/null
+++ b/tools/scripts/system-iptables.sh
@@ -0,0 +1,361 @@
+#!/bin/sh
+
+#
+#                                XXXXXXXXXXXXXXXXX
+#                                XXXX Network XXXX
+#                                XXXXXXXXXXXXXXXXX
+#                                        +
+#                                        |
+#                                        v
+#  +-------------+              +------------------+
+#  |table: filter| <---+        | table: nat       |
+#  |chain: INPUT |     |        | chain: PREROUTING|
+#  +-----+-------+     |        +--------+---------+
+#        |             |                 |
+#        v             |                 v
+#  [local process]     |           ****************          +--------------+
+#        |             +---------+ Routing decision +------> |table: filter |
+#        v                         ****************          |chain: FORWARD|
+# ****************                                           +------+-------+
+# Routing decision                                                  |
+# ****************                                                  |
+#        |                                                          |
+#        v                        ****************                  |
+# +-------------+       +------>  Routing decision  <---------------+
+# |table: nat   |       |         ****************
+# |chain: OUTPUT|       |               +
+# +-----+-------+       |               |
+#       |               |               v
+#       v               |      +-------------------+
+# +--------------+      |      | table: nat        |
+# |table: filter | +----+      | chain: POSTROUTING|
+# |chain: OUTPUT |             +--------+----------+
+# +--------------+                      |
+#                                       v
+#                               XXXXXXXXXXXXXXXXX
+#                               XXXX Network XXXX
+#                               XXXXXXXXXXXXXXXXX
+#
+# iptables [-t table] {-A|-C|-D} chain rule-specification
+#
+# iptables [-t table] {-A|-C|-D} chain  rule-specification
+#
+# iptables  [-t table] -I chain [rulenum] rule-specification
+#
+# iptables [-t table] -R chain rulenum  rule-specification
+#
+# iptables [-t table] -D chain rulenum
+#
+# iptables [-t table] -S [chain [rulenum]]
+#
+# iptables  [-t  table]  {-F|-L|-Z} [chain [rulenum]] [options...]
+#
+# iptables [-t table] -N chain
+#
+# iptables [-t table] -X [chain]
+#
+# iptables [-t table] -P chain target
+#
+# iptables [-t table]  -E  old-chain-name  new-chain-name
+#
+# rule-specification = [matches...] [target]
+#
+# match = -m matchname [per-match-options]
+#
+#
+# Targets
+#
+# can be a user defined chain
+#
+# ACCEPT - accepts the packet
+# DROP   - drop the packet on the floor
+# QUEUE  - packet will be stent to queue
+# RETURN - stop traversing this chain and
+#          resume ate the next rule in the
+#          previeus (calling) chain.
+#
+# if packet reach the end of the chain or
+# a target RETURN, default policy for that
+# chain is applayed.
+#
+# Target Extensions
+#
+# AUDIT
+# CHECKSUM
+# CLASSIFY
+# DNAT
+# DSCP
+# LOG
+#     Torn on kernel logging, will print some
+#     some information on all matching packets.
+#     Log data can be read with dmesg or syslogd.
+#     This is a non-terminating target and a rule
+#     should be created with matching criteria.
+#
+#     --log-level level
+#           Level of logging (numeric or see sys-
+#           log.conf(5)
+#
+#     --log-prefix prefix
+#           Prefix log messages with specified prefix
+#           up to 29 chars log
+#
+#     --log-uid
+#           Log the userid of the process with gener-
+#           ated the packet
+# NFLOG
+#     This target pass the packet to loaded logging
+#     backend to log the packet. One or more userspace
+#     processes may subscribe to the group to receive
+#     the packets.
+#
+# ULOG
+#     This target provides userspace logging of maching
+#     packets. One or more userspace processes may then
+#     then subscribe to various multicast groups and
+#     then receive the packets.
+#
+#
+# Commands
+#
+# -A, --append chain rule-specification
+# -C, --check chain rule-specification
+# -D, --delete chain rule-specification
+# -D, --delete chain rulenum
+# -I, --insert chain [rulenum] rule-specification
+# -R, --replace chain rulenum rule-specification
+# -L, --list [chain]
+# -P, --policy chain target
+#
+# Parameters
+#
+# -p, --protocol protocol
+#       tcp, udp, udplite, icmp, esp, ah, sctp, all
+# -s, --source address[/mask][,...]
+# -d, --destination address[/mask][,...]
+# -j, --jump target
+# -g, --goto chain
+# -i, --in-interface name
+# -o, --out-interface name
+# -f, --fragment
+# -m, --match options module-name
+#       iptables can use extended packet matching
+#       modules.
+# -c, --set-counters packets bytes
+
+IPT="/usr/sbin/iptables"
+SPAMLIST="blockedip"
+SPAMDROPMSG="BLOCKED IP DROP"
+
+PUB_IF="wlp7s0"
+#PRIV_IF="wlp3s0"
+
+BRIDGE="br0"
+BNET=10.0.0.0
+BMSK=24
+
+DHCP_IP="192.168.1.254"
+PUB_IP=$(ip addr show dev ${PUB_IF} | grep 'state UP' -A2 | tail -n1 | awk '{print $2}' | cut -f1 -d'/')
+
+modprobe ip_conntrack
+modprobe ip_conntrack_ftp
+
+echo "Stopping ipv4 firewall and deny everyone..."
+
+iptables -F
+iptables -X
+iptables -t nat -F
+iptables -t nat -X
+iptables -t mangle -F
+iptables -t mangle -X
+iptables -t raw -F
+iptables -t raw -X
+iptables -t security -F
+iptables -t security -X
+
+
+echo "Starting ipv4 firewall filter table..."
+
+# Set Default Rules
+iptables -P INPUT DROP
+iptables -P FORWARD DROP
+iptables -P OUTPUT DROP
+
+
+# Unlimited on local
+$IPT -A INPUT -i lo -j ACCEPT
+$IPT -A OUTPUT -o lo -j ACCEPT
+
+$IPT -A INPUT -i $BRIDGE -j ACCEPT
+$IPT -A OUTPUT -o $BRIDGE -j ACCEPT
+
+# Block sync
+$IPT -A INPUT -p tcp ! --syn -m state --state NEW -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 7 --log-prefix "iptables: drop sync: "
+$IPT -A INPUT -p tcp ! --syn -m state --state NEW -j DROP
+
+# Block Fragments
+$IPT -A INPUT -f -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop frag: "
+$IPT -A INPUT -f -j DROP
+
+# Block bad stuff
+$IPT -A INPUT -p tcp --tcp-flags ALL FIN,URG,PSH -j DROP
+$IPT -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
+
+$IPT -A INPUT -p tcp --tcp-flags ALL NONE -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop null: "
+$IPT -A INPUT -p tcp --tcp-flags ALL NONE -j DROP # NULL packets
+
+$IPT -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop syn rst syn rst: "
+$IPT -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
+
+$IPT -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop xmas: "
+$IPT -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP #XMAS
+
+$IPT -A INPUT -p tcp --tcp-flags FIN,ACK FIN -m limit --limit 5/m --limit-burst 7 -j LOG --log-level 4 --log-prefix "iptables: drop fin scan: "
+$IPT -A INPUT -p tcp --tcp-flags FIN,ACK FIN -j DROP # FIN packet scans
+
+$IPT -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
+
+##### Add your virtual rules below ######
+
+#echo 1 > /proc/sys/net/ipv4/ip_forward
+#$IPT -t nat -A POSTROUTING -o ${PUB_IF} -j SNAT --to ${PUB_IP}
+##$IPT -t nat -A POSTROUTING -s 10.0.2.0/24 -o ${PUB_IF} -j MASQUERADE
+#$IPT -A FORWARD -i ${TAP_IF} -o ${PUB_IF} -j ACCEPT
+#$IPT -A FORWARD -i ${PUB_IF} -o ${TAP_IF} -j ACCEPT
+#
+#$IPT -A INPUT -i ${TAP_IF} -j ACCEPT
+#$IPT -A OUTPUT -o ${TAP_IF} -j ACCEPT
+
+##### Add your AP rules below ######
+
+#echo 1 > /proc/sys/net/ipv4/ip_forward
+#$IPT -t nat -A POSTROUTING -o ${PUB_IF} -j SNAT --to ${PUB_IP}
+#$IPT -A FORWARD -i ${PRIV_IF} -o ${PUB_IF} -j ACCEPT
+#$IPT -A FORWARD -i ${PUB_IF} -o ${PRIV_IF} -j ACCEPT
+
+#$IPT -A INPUT -i ${PRIV_IF} -j ACCEPT
+#$IPT -A OUTPUT -o ${PRIV_IF} -j ACCEPT
+
+##### Server rules below ######
+
+#echo "Allow ICMP"
+#$IPT -A INPUT -i ${PUB_IF} -p icmp --icmp-type 0 -s 192.168.0.0/16 -j ACCEPT
+#$IPT -A OUTPUT -o ${PUB_IF} -p icmp --icmp-type 0 -d 192.168.0.0/16 -j ACCEPT
+#$IPT -A INPUT -i ${PUB_IF} -p icmp --icmp-type 8 -s 192.168.0.0/16 -j ACCEPT
+#$IPT -A OUTPUT -o ${PUB_IF} -p icmp --icmp-type 8 -d 192.168.0.0/16 -j ACCEPT
+
+#echo "Allow DNS Server"
+#$IPT -A INPUT -i ${PUB_IF} -p udp --sport 1024:65535 --dport 53  -m state --state NEW,ESTABLISHED -s 192.168.0.0/16 -j ACCEPT
+#$IPT -A OUTPUT -o ${PUB_IF} -p udp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -d 192.168.0.0/16 -j ACCEPT
+
+#echo "Allow HTTP and HTTPS server"
+#$IPT -A INPUT -i ${PUB_IF} -p tcp --dport 443 -m state --state NEW,ESTABLISHED -s 192.168.0.0/16 -j ACCEPT
+#$IPT -A INPUT -i ${PUB_IF} -p tcp --dport 80 -m state --state NEW,ESTABLISHED -s 192.168.0.0/16 -j ACCEPT
+#$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 80 -m state --state NEW,ESTABLISHED -s 192.168.0.0/16 -j ACCEPT
+#$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 443 -m state --state NEW,ESTABLISHED -s 192.168.0.0/16 -j ACCEPT
+
+#echo "Allow ssh server"
+#$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
+#$IPT -A INPUT  -i ${PUB_IF} -p tcp --dport 22 -m state --state ESTABLISHED -j ACCEPT
+#$IPT -A INPUT  -i ${PUB_IF} -p tcp --dport 22 -m state --state NEW -m limit --limit 3/min --limit-burst 3 -j ACCEPT
+
+##### Add your rules below ######
+
+echo "Allow DNS Client"
+
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p udp --sport 53 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
+
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 53 -m state --state NEW -j LOG --log-level 7 --log-prefix "iptables: DNS TCP: "
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+$IPT -A OUTPUT -o ${PUB_IF} -p udp --sport 1024:65535 --dport 53 -m state --state NEW -j ACCEPT -j LOG --log-level 7 --log-prefix "iptables: DNS UDP: "
+$IPT -A OUTPUT -o ${PUB_IF} -p udp --sport 1024:65535 --dport 53 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+echo "Allow Whois Client"
+
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 43 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 43 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+echo "Allow HTTP Client"
+
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 80 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 443 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p udp --sport 443 --dport 1024:65535 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p udp --sport 1024:65535 --dport 443 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+
+echo "Allow Rsync Client"
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 873 -m state --state NEW,ESTABLISHED -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 873 -m state --state ESTABLISHED -j ACCEPT
+
+echo "Allow POP3S Client"
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 995 -m state --state NEW,ESTABLISHED -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 995 -m state --state ESTABLISHED -j ACCEPT
+
+echo "Allow SMTPS Client"
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 465 -m state --state NEW,ESTABLISHED -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 465 -m state --state ESTABLISHED -j ACCEPT
+
+echo "Allow NTP Client"
+$IPT -A OUTPUT -o ${PUB_IF} -p udp --dport 123 -m state --state NEW,ESTABLISHED -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p udp --sport 123 -m state --state ESTABLISHED -j ACCEPT
+
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 21 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 21 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+echo "Allow IRC Client"
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 6667 -m state --state NEW -j ACCEPT
+
+echo "Allow Active FTP Client"
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 20 -m state --state ESTABLISHED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 20 -m state --state NEW,ESTABLISHED -j ACCEPT
+
+echo "Allow Git"
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 9418 -m state --state NEW -j ACCEPT
+
+echo "Allow ssh client"
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
+$IPT -A INPUT  -i ${PUB_IF} -p tcp --sport 22 -m state --state ESTABLISHED -j ACCEPT
+
+#echo "Allow Passive Connections"
+$IPT -A INPUT -i ${PUB_IF} -p tcp --sport 1024:65535 --dport 1024: -m state --state ESTABLISHED,RELATED -j ACCEPT
+$IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 1024:65535 --dport 1024:  -m state --state ESTABLISHED,RELATED -j ACCEPT
+
+# echo "Allow FairCoin"
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 46392 -m state --state NEW,ESTABLISHED -j ACCEPT
+# $IPT -A INPUT -i ${PUB_IF} -p tcp --sport 46392 -m state --state ESTABLISHED -j ACCEPT
+#
+# echo "Allow Dashcoin"
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 29080 -m state --state NEW,ESTABLISHED -j ACCEPT
+# $IPT -A INPUT -i ${PUB_IF} -p tcp --sport 29080 -m state --state ESTABLISHED -j ACCEPT
+#
+# echo "Allow warzone2100"
+# $IPT -A INPUT -i ${PUB_IF} -p tcp --dport 2100 -s 192.168.0.0/16 -j ACCEPT
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --sport 2100 -j ACCEPT
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 2100 -j ACCEPT
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 9990 -j ACCEPT
+#
+# echo "Allow wesnoth"
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 15000 -m state --state NEW -j ACCEPT
+# $IPT -A OUTPUT -o ${PUB_IF} -p tcp --dport 14998 -m state --state NEW -j ACCEPT
+
+##### END your rules ############
+# Less log of known traffic
+
+# RIP protocol
+$IPT -A INPUT -i ${PUB_IF} -p udp --sport 520 --dport 520 -s 192.168.0.0/16 -j DROP
+
+# DHCP
+$IPT -A OUTPUT -o ${PUB_IF} -p udp --sport 68 --dport 67 -d $DHCP_IP -j ACCEPT
+$IPT -A INPUT -i ${PUB_IF} -p udp --sport 68 --dport 67 -s $DHCP_IP -j ACCEPT
+
+# log everything else and drop
+$IPT -A INPUT -j LOG --log-level 7 --log-prefix "iptables: INPUT: "
+$IPT -A OUTPUT -j LOG --log-level 7 --log-prefix "iptables: OUTPUT: "
+$IPT -A FORWARD -j LOG --log-level 7 --log-prefix "iptables: FORWARD: "
+
+exit 0