summaryrefslogtreecommitdiff
path: root/hosts/surtr/ruleset.nft
blob: ee72614fa636d619e96862aa79e05197a0d1378c (plain)
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
234
235
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 drop-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 smtp-rx {}
  counter submissions-rx {}
  counter imaps-rx {}
  counter managesieve-rx {}
  counter pgbackrest-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 smtp-tx {}
  counter submissions-tx {}
  counter imaps-tx {}
  counter managesieve-tx {}
  counter pgbackrest-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 60000-61000 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
    udp dport {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

    tcp dport 25 counter name smtp-rx accept
    tcp dport 465 counter name submissions-rx accept
    tcp dport 993 counter name imaps-rx accept
    tcp dport 4190 counter name managesieve-rx accept
    iifname yggdrasil tcp dport 8432 counter name pgbackrest-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 60000-61000 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
    udp sport {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

    tcp sport 25 counter name smtp-tx accept
    tcp sport 465 counter name submissions-tx accept
    tcp sport 993 counter name imaps-tx accept
    tcp sport 4190 counter name managesieve-tx accept
    tcp sport 8432 counter name pgbackrest-tx accept


    counter name tx
  }
}