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
|
define icmp_protos = {ipv6-icmp, icmp, igmp}
table arp filter {
limit lim_arp {
rate over 50 mbytes/second burst 50 mbytes
}
counter arp-rx {}
counter arp-tx {}
counter arp-ratelimit-rx {}
counter arp-ratelimit-tx {}
chain input {
type filter hook input priority filter
policy accept
limit name lim_arp counter name arp-ratelimit-rx drop
counter name arp-rx
}
chain output {
type filter hook output priority filter
policy accept
limit name lim_arp counter name arp-ratelimit-tx drop
counter name arp-tx
}
}
table inet filter {
limit lim_reject {
rate over 1000/second burst 1000 packets
}
limit lim_icmp {
rate over 50 mbytes/second burst 50 mbytes
}
counter invalid-fw {}
counter fw-lo {}
counter fw-bifrost {}
counter fw-inet {}
counter icmp-ratelimit-vpn-fw {}
counter icmp-ratelimit-established-fw {}
counter icmp-ratelimit-inet-fw {}
counter icmp-vpn-fw {}
counter icmp-established-fw {}
counter icmp-inet-fw {}
counter reject-ratelimit-fw {}
counter reject-fw {}
counter reject-tcp-fw {}
counter reject-icmp-fw {}
counter invalid-rx {}
counter rx-lo {}
counter invalid-local4-rx {}
counter invalid-local6-rx {}
counter icmp-ratelimit-rx {}
counter icmp-rx {}
counter ssh-rx {}
counter mosh-rx {}
counter wg-rx {}
counter yggdrasil-gre-rx {}
counter dns-rx {}
counter http-rx {}
counter stun-rx {}
counter turn-rx {}
counter established-rx {}
counter reject-ratelimit-rx {}
counter reject-rx {}
counter reject-tcp-rx {}
counter reject-icmp-rx {}
counter drop-rx {}
counter tx-lo {}
counter icmp-ratelimit-tx {}
counter icmp-tx {}
counter ssh-tx {}
counter mosh-tx {}
counter dns-tx {}
counter wg-tx {}
counter yggdrasil-gre-tx {}
counter http-tx {}
counter stun-tx {}
counter turn-tx {}
counter tx {}
chain forward {
type filter hook forward priority filter
policy drop
ct state invalid log level debug prefix "drop invalid forward: " counter name invalid-fw drop
iifname lo counter name fw-lo accept
meta l4proto $icmp_protos iifname {yggdrasil, bifrost} oifname {bifrost, ens3} limit name lim_icmp counter name icmp-ratelimit-vpn-fw drop
meta l4proto $icmp_protos iifname {yggdrasil, bifrost} oifname {bifrost, ens3} counter name icmp-vpn-fw accept
meta l4proto $icmp_protos ct state {established, related} limit name lim_icmp counter name icmp-ratelimit-established-fw drop
meta l4proto $icmp_protos ct state {established, related} counter name icmp-established-fw accept
meta l4proto $icmp_protos oifname bifrost limit name lim_icmp counter name icmp-ratelimit-inet-fw drop
meta l4proto $icmp_protos oifname bifrost counter name icmp-inet-fw accept
oifname bifrost counter name fw-bifrost accept
iifname bifrost oifname ens3 counter name fw-inet accept
limit name lim_reject log level debug prefix "drop forward: " counter name reject-ratelimit-fw drop
log level debug prefix "reject forward: " counter name reject-fw
meta l4proto tcp ct state new counter name reject-tcp-fw reject with tcp reset
ct state new counter name reject-icmp-fw reject
counter name drop-fw
}
chain input {
type filter hook input priority filter
policy drop
ct state invalid log level debug prefix "drop invalid input: " counter name invalid-rx drop
iifname lo counter name rx-lo accept
iif != lo ip daddr 127.0.0.1/8 counter name invalid-local4-rx reject
iif != lo ip6 daddr ::1/128 counter name invalid-local6-rx reject
meta l4proto $icmp_protos limit name lim_icmp counter name icmp-ratelimit-rx drop
meta l4proto $icmp_protos counter name icmp-rx accept
tcp dport 22 counter name ssh-rx accept
udp dport 60001-61000 counter name mosh-rx accept
meta protocol ip udp dport 51820 counter name wg-rx accept
meta protocol ip6 udp dport {51821, 51822} counter name wg-rx accept
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-rx accept
tcp dport 53 counter name dns-rx accept
udp dport 53 counter name dns-rx accept
tcp dport {80, 443, 8448} counter name http-rx accept
tcp dport {3478, 5349} counter name stun-rx accept
udp dport {3478, 5349} counter name stun-rx accept
udp dport 49000-50000 counter name turn-rx accept
ct state {established, related} counter name established-rx accept
limit name lim_reject log level debug prefix "drop input: " counter name reject-ratelimit-rx drop
log level debug prefix "reject input: " counter name reject-rx
meta l4proto tcp ct state new counter name reject-tcp-rx reject with tcp reset
ct state new counter name reject-icmp-rx reject
counter name drop-rx
}
chain output {
type filter hook output priority filter
policy accept
oifname lo counter name tx-lo accept
meta l4proto $icmp_protos limit name lim_icmp counter name icmp-ratelimit-tx drop
meta l4proto $icmp_protos counter name icmp-tx accept
tcp sport 22 counter name ssh-tx
udp sport 60001-61000 counter name mosh-tx
tcp sport 53 counter name dns-tx
udp sport 53 counter name dns-tx
meta protocol ip udp sport 51820 counter name wg-tx
meta protocol ip6 udp sport {51821, 51822} counter name wg-tx
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-tx
tcp sport {80,443,8448} counter name http-tx accept
tcp sport {3478, 5349} counter name stun-tx accept
udp sport {3478, 5349} counter name stun-tx accept
udp sport 49000-50000 counter name turn-tx accept
counter name tx
}
}
|
