dotfiles/src/iptables.sh at master · BullShark/dotfiles · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
#!/bin/bash
# Suggested:
#   Put this in /etc/rsyslog.conf
#   And iptables logs will have it's own file
#   kern.warning /var/log/iptables.log
#set -x
#set -v

##################################################################%%%%%%%%
# Global variables
##################################################################%%%%%%%%

bullshark="70.112.0.0/12"
bullshark6="2603:8000::/24"
bullshark_hamachi="25.0.0.0/8"
bullshark_5g_mobile="172.32.0.0/11"
bullshark_5g_mobile6="2607:fb90::/28"
drk="184.155.0.0/16"
franklin="73.38.104.154"
lan="192.168.0.0/16" # 192.168.0.0–192.168.255.255
lan6="fe80::/64"
multicast="224.0.0.0/4"
multicast6="ff02::fb"
broadcast="192.168.0.255"
local_broadcast="255.255.255.255"
localhost="127.0.0.0/8"
localhost6="::1/128"
local_net6="fc00::/7"
iface="enp3s0"
#iface="eth0"

##################################################################%%%%%%%%
# IPv6
##################################################################%%%%%%%%

ip6tables -F
ip6tables -X
ip6tables -Z

ip6tables -P INPUT DROP
ip6tables -P FORWARD DROP
ip6tables -P OUTPUT ACCEPT

# Might get noisy (info message)
ip6tables -A INPUT -j LOG -m limit --limit 5/min --log-prefix "ip6tables INPUT: " --log-level 6 --log-tcp-sequence --log-tcp-options --log-ip-options --log-uid

# Anti-spoofing
ip6tables -A INPUT ! -i lo -s $lan6 -j DROP
ip6tables -A INPUT -i $ -s $local_net6 -j DROP
ip6tables -A FORWARD -s $lan6 -j DROP
ip6tables -A FORWARD -i $iface -s $local_net6 -j DROP

# Block tunnel prefixes
ip6tables -A INPUT -s 2002::/16 -j DROP
ip6tables -A INPUT -s 2001:0::/32 -j DROP
ip6tables -A FORWARD -s 2002::/16 -j DROP
ip6tables -A FORWARD -s 2001:0::/32 -j DROP

# This has already been done above and should come before the opening port rules
ip6tables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
ip6tables -A INPUT -i lo -j ACCEPT -m comment --comment "Localhost lo interface"
ip6tables -A INPUT -m conntrack --ctstate INVALID -j DROP

# Log Blocked Traffic (log level: kernel warning)
ip6tables -A INPUT -m limit --limit 5/min -j LOG --log-prefix "ip6tables denied: " --log-level 4 --log-tcp-sequence --log-tcp-options --log-ip-options --log-uid

# Log Any Forwarding Traffic (log level: kernel warning)
ip6tables -A FORWARD -m limit --limit 5/min -j LOG --log-prefix "ip6tables FORWARD denied: " --log-level 4 --log-tcp-sequence --log-tcp-options --log-ip-options --log-uid

ip6tables -A INPUT -p ipv6-icmp -j ACCEPT
ip6tables -A INPUT -p udp -m conntrack --ctstate NEW -j REJECT --reject-with icmp6-port-unreachable
ip6tables -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m conntrack --ctstate NEW -j REJECT --reject-with tcp-reset

##################################################################%%%%%%%%
# IPv4
##################################################################%%%%%%%%

iptables -F
iptables -X
iptables -Z

iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT

# Might get noisy (info message)
iptables -A INPUT -j LOG -m limit --limit 5/min --log-prefix "iptables INPUT: " --log-level 6 --log-tcp-sequence --log-tcp-options --log-ip-options --log-uid

iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -i lo -j ACCEPT -m comment --comment "Localhost lo interface"

# Allow SSH
iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 22 -j ACCEPT -m comment --comment "SSH"
ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 22 -j ACCEPT -m comment --comment "SSH"
iptables -A INPUT -p tcp -m state --state NEW --source $bullshark_5g_mobile --dport 22 -j ACCEPT -m comment --comment "SSH"
ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark_5g_mobile6 --dport 22 -j ACCEPT -m comment --comment "SSH"
iptables -A INPUT -p tcp -m state --state NEW --source $drk --dport 22 -j ACCEPT -m comment --comment "SSH"
iptables -A INPUT -p tcp -m state --state NEW --source $franklin --dport 22 -j ACCEPT -m comment --comment "SSH"

# KDE Connect (LAN)
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 1716 -j ACCEPT -m comment --comment "KDE Connect"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 1716 -j ACCEPT -m comment --comment "KDE Connect"
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $lan --dport 1716 -j ACCEPT -m comment --comment "KDE Connect"
ip6tables -A INPUT -p udp -m state --state NEW --source $lan6 --destination $lan6 --dport 1716 -j ACCEPT -m comment --comment "KDE Connect"
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 1739 -j ACCEPT -m comment --comment "KDE Connect"
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $multicast --dport 1716 -j ACCEPT -m comment --comment "KDE Connect"
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $local_broadcast --dport 1716 -j ACCEPT -m comment --comment "KDE Connect"

# Samba (LAN)
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 137 -j ACCEPT -m comment --comment "Samba"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 137 -j ACCEPT -m comment --comment "Samba"
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 138 -j ACCEPT -m comment --comment "Samba"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 138 -j ACCEPT -m comment --comment "Samba"
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 139 -j ACCEPT -m comment --comment "Samba"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 139 -j ACCEPT -m comment --comment "Samba"
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 445 -j ACCEPT -m comment --comment "Samba"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 445 -j ACCEPT -m comment --comment "Samba"

# Samba (Broadcast)
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $broadcast --sport 136 --dport 136 -j ACCEPT -m comment --comment "Samba"
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $broadcast --sport 137 --dport 137 -j ACCEPT -m comment --comment "Samba"
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $broadcast --sport 138 --dport 138 -j ACCEPT -m comment --comment "Samba"

# Cups Printer
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 631 -j ACCEPT -m comment --comment "Cups Printer"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 631 -j ACCEPT -m comment --comment "Cups Printer"

# Avahi Daemon (Used by my TV)
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $lan --dport 5353 -j ACCEPT -m comment --comment "Avahi"
ip6tables -A INPUT -p udp -m state --state NEW --source $lan6 --destination $lan6 --dport 5353 -j ACCEPT -m comment --comment "Avahi"
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $multicast --sport 5353 --dport 5353 -j ACCEPT -m comment --comment "Avahi"

# TV Miracast and Samsung SmartThings App
iptables -A INPUT -p udp -m state --state NEW --source $lan --destination $broadcast --dport 15600 -j ACCEPT -m comment --comment "TV Miracast"

# Android Debugger ADB
iptables -A INPUT -p tcp -m state --state NEW --source $lan --destination $lan --dport 5037 -j ACCEPT -m comment --comment "ADB"
ip6tables -A INPUT -p tcp -m state --state NEW --source $lan6 --destination $lan6 --dport 5037 -j ACCEPT -m comment --comment "ADB"

# WireGuard (Bullshark and Drk)
#iptables -A INPUT -p udp -m state --state NEW --source $bullshark --dport 5555 -j ACCEPT -m comment --comment "Wireguard"
#ip6tables -A INPUT -p udp -m state --state NEW --source $bullshark6 --dport 5555 -j ACCEPT -m comment --comment "Wireguard"
#iptables -A INPUT -p udp -m state --state NEW --source $drk --dport 5555 -j ACCEPT -m comment --comment "Wireguard"

# Allow Postfix (BullShark and LAN)
#iptables -A INPUT -p tcp -m state --state NEW --dport 25 -j ACCEPT -m comment --comment "Postfix"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 25 -j ACCEPT -m comment --comment "Postfix"

# Dovecot (LAN and BullShark)
#iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 143 -j ACCEPT -m comment --comment "Dovecot"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 143 -j ACCEPT -m comment --comment "Dovecot"
#iptables -A INPUT -p tcp -m state --state NEW --source $localhost --destination $localhost --dport 143 -j ACCEPT -m comment --comment "Dovecot"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $localhost6 --destination $localhost6 --dport 143 -j ACCEPT -m comment --comment "Dovecot"
#iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 993 -j ACCEPT -m comment --comment "Dovecot"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 993 -j ACCEPT -m comment --comment "Dovecot"
#iptables -A INPUT -p tcp -m state --state NEW --source $localhost --destination $localhost --dport 993 -j ACCEPT -m comment --comment "Dovecot"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $localhost6 --destination $localhost6 --dport 993 -j ACCEPT -m comment --comment "Dovecot"

# Allow Apache
#iptables -A INPUT -p tcp -m state --state NEW --dport 80 -j ACCEPT -m comment --comment "Apache"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 80 -j ACCEPT -m comment --comment "Apache"

# Apache HTTPS
#iptables -A INPUT -p tcp -m state --state NEW --dport 443 -j ACCEPT -m comment --comment "Apache HTTPS"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 443 -j ACCEPT -m comment --comment "Apache HTTPS"

# Python Flask
#iptables -A INPUT -p tcp -m state --state NEW --dport 5000 -j ACCEPT -m comment --comment "Flask"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 5000 -j ACCEPT -m comment --comment "Flask"

# Allow AdGuard Home (BullShark on the Web UI)
#iptables -A INPUT -p tcp -m state --state NEW --dport 53 -j ACCEPT -m comment --comment "Adguard Home"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 53 -j ACCEPT -m comment --comment "Adguard Home"
#iptables -A INPUT -p udp -m state --state NEW --dport 53 -j ACCEPT -m comment --comment "Adguard Home"
#ip6tables -A INPUT -p udp -m state --state NEW --dport 53 -j ACCEPT -m comment --comment "Adguard Home"
#iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 8080 -j ACCEPT -m comment --comment "Adguard Home Web"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 8080 -j ACCEPT -m comment --comment "Adguard Home Web"

# Mumble Server
#iptables -A INPUT -p tcp -m state --state NEW --dport 64738 -j ACCEPT -m comment --comment "Mumble"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 64738 -j ACCEPT -m comment --comment "Mumble"
#iptables -A INPUT -p udp -m state --state NEW --dport 64738 -j ACCEPT -m comment --comment "Mumble"
#ip6tables -A INPUT -p udp -m state --state NEW --dport 64738 -j ACCEPT -m comment --comment "Mumble"

# CraftBukkit
#iptables -A INPUT -p tcp -m state --state NEW --dport 25565 -j ACCEPT -m comment --comment "Minecraft"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 25565 -j ACCEPT -m comment --comment "Minecraft"
#iptables -A INPUT -p udp -m state --state NEW --dport 25565 -j ACCEPT -m comment --comment "Minecraft"
#ip6tables -A INPUT -p udp -m state --state NEW --dport 25565 -j ACCEPT -m comment --comment "Minecraft"

# Mysql (localhost only)
#iptables -A INPUT -p tcp -m state --state NEW --source $localhost --destination $localhost --dport 3306 -j ACCEPT -m comment --comment "Mysql"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $localhost6 --destination $localhost6 --dport 3306 -j ACCEPT -m comment --comment "Mysql"

# Postgresql (localhost only)
#iptables -A INPUT -p tcp -m state --state NEW -s $localhost --dport 5432 -j ACCEPT -m comment --comment "PostgreSQL"
#ip6tables -A INPUT -p tcp -m state --state NEW -s $localhost6 --dport 5432 -j ACCEPT -m comment --comment "PostgreSQL"

# Matrix
#iptables -A INPUT -p tcp -m state --state NEW --dport 8008 -j ACCEPT -m comment --comment "Matrix"
#ip6tables -A INPUT -p tcp -m state --state NEW --dport 8008 -j ACCEPT -m comment --comment "Matrix"

# Netcat Reverse Shell (BullShark)
#iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 1337 -j ACCEPT -m comment --comment "Netcat"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 1337 -j ACCEPT -m comment --comment "Netcat"

# Cockpit (BullShark)
#iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 9090 -j ACCEPT -m comment --comment "Cockpit"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 9090 -j ACCEPT -m comment --comment "Cockpit"
#iptables -A INPUT -p tcp -m state --state NEW --source $franklin --dport 9090 -j ACCEPT -m comment --comment "Cockpit"

# Webmin (BullShark)
#iptables -A INPUT -p tcp -m state --state NEW --source $bullshark --dport 10000 -j ACCEPT -m comment --comment "Webmin"
#ip6tables -A INPUT -p tcp -m state --state NEW --source $bullshark6 --dport 10000 -j ACCEPT -m comment --comment "Webmin"
#iptables -A INPUT -p udp -m state --state NEW --source $bullshark --dport 10000 -j ACCEPT -m comment --comment "Webmin"
#ip6tables -A INPUT -p udp -m state --state NEW --source $bullshark6 --dport 10000 -j ACCEPT -m comment --comment "Webmin"

# Log Blocked Traffic (log level: kernel warning)
iptables -A INPUT -m limit --limit 5/min -j LOG --log-prefix "iptables denied: " --log-level 4 --log-tcp-sequence --log-tcp-options --log-ip-options --log-uid

# Log Any Forwarding Traffic (log level: kernel warning)
iptables -A FORWARD -m limit --limit 5/min -j LOG --log-prefix "iptables FORWARD denied: " --log-level 4 --log-tcp-sequence --log-tcp-options --log-ip-options --log-uid

# Block IPv6 in IPv4
iptables -A INPUT -p 41 -j DROP -m comment --comment "IPv6 in IPv4"
iptables -A FORWARD -p 41 -j DROP -m comment --comment "IPv6 in IPv4"

# Ping
iptables -A INPUT -p icmp --icmp-type 3 -j ACCEPT
iptables -A INPUT -p icmp --icmp-type 11 -j ACCEPT
iptables -A INPUT -p icmp --icmp-type 12 -j ACCEPT
iptables -A INPUT -p tcp --syn --dport 113 -j REJECT --reject-with tcp-reset