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
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
define icmp_protos = { ipv6-icmp, icmp, igmp }
table arp filter {
limit lim_arp_local {
rate over 50 mbytes/second burst 50 mbytes
}
limit lim_arp_dsl {
rate over 1400 kbytes/second burst 1400 kbytes
}
counter arp-rx {}
counter arp-tx {}
counter arp-ratelimit-dsl-rx {}
counter arp-ratelimit-dsl-tx {}
counter arp-ratelimit-local-rx {}
counter arp-ratelimit-local-tx {}
chain input {
type filter hook input priority filter
policy accept
iifname != dsl limit name lim_arp_local counter name arp-ratelimit-local-rx drop
iifname dsl limit name lim_arp_dsl counter name arp-ratelimit-dsl-rx drop
counter name arp-rx
}
chain output {
type filter hook output priority filter
policy accept
oifname != dsl limit name lim_arp_local counter name arp-ratelimit-local-tx drop
oifname dsl limit name lim_arp_dsl counter name arp-ratelimit-dsl-tx drop
counter name arp-tx
}
}
table inet filter {
limit lim_reject {
rate over 1000/second burst 1000 packets
}
limit lim_icmp_local {
rate over 50 mbytes/second burst 50 mbytes
}
limit lim_icmp_dsl {
rate over 1400 kbytes/second burst 1400 kbytes
}
counter icmp-ratelimit-dsl-fw {}
counter icmp-ratelimit-local-fw {}
counter icmp-fw {}
counter invalid-fw {}
counter fw-lo {}
counter fw-lan {}
counter fw-dsl {}
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-dsl-rx {}
counter icmp-ratelimit-local-rx {}
counter icmp-rx {}
counter ssh-rx {}
counter mosh-rx {}
counter dns-rx {}
counter wg-rx {}
counter yggdrasil-gre-rx {}
counter ipv6-pd-rx {}
counter ntp-rx {}
counter dhcp-rx {}
counter samba-rx {}
counter http-rx {}
counter established-rx {}
counter reject-ratelimit-rx {}
counter reject-rx {}
counter reject-tcp-rx {}
counter reject-icmp-rx {}
counter tx-lo {}
counter icmp-ratelimit-dsl-tx {}
counter icmp-ratelimit-local-tx {}
counter icmp-tx {}
counter ssh-tx {}
counter mosh-tx {}
counter dns-tx {}
counter wg-tx {}
counter yggdrasil-gre-tx {}
counter ipv6-pd-tx {}
counter ntp-tx {}
counter dhcp-tx {}
counter samba-tx {}
counter http-tx {}
counter tx {}
chain forward_icmp_accept {
oifname dsl limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-fw drop
iifname dsl limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-fw drop
oifname != dsl limit name lim_icmp_local counter name icmp-ratelimit-local-fw drop
iifname != dsl limit name lim_icmp_local counter name icmp-ratelimit-local-fw drop
counter name icmp-fw accept
}
chain forward {
type filter hook forward priority filter
policy drop
ct state invalid log level notice prefix "drop invalid forward: " counter name invalid-fw drop
iifname lo counter name fw-lo accept
oifname {lan, dsl} meta l4proto $icmp_protos jump forward_icmp_accept
iifname lan oifname dsl counter name fw-lan accept
iifname dsl oifname lan ct state {established, related} counter name fw-dsl accept
limit name lim_reject log level notice prefix "drop forward: " counter name reject-ratelimit-fw drop
log level info 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
}
chain input {
type filter hook input priority filter
policy drop
ct state invalid log level notice 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
iifname dsl meta l4proto $icmp_protos limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-rx drop
iifname != dsl meta l4proto $icmp_protos limit name lim_icmp_local counter name icmp-ratelimit-local-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
iifname lan tcp dport 53 counter name dns-rx accept
iifname lan udp dport 53 counter name dns-rx accept
meta protocol ip udp dport 51820 counter name wg-rx accept
meta protocol ip6 udp dport 51821 counter name wg-rx accept
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-rx accept
iifname dsl meta protocol ip6 udp dport 546 udp sport 547 counter name ipv6-pd-rx accept
iifname mgmt udp dport 123 counter name ntp-rx accept
iifname {lan, mgmt} udp dport 67 counter name dhcp-rx accept
iifname lan udp dport { 137, 138, 3702 } counter name samba-rx accept
iifname lan tcp dport { 445, 139, 5357 } counter name samba-rx accept
iifname yggdrasil tcp dport 80 counter name http-rx accept
ct state {established, related} counter name established-rx accept
limit name lim_reject log level notice prefix "drop input: " counter name reject-ratelimit-rx drop
log level info 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
}
chain output {
type filter hook output priority filter
policy accept
oifname lo counter name tx-lo accept
oifname dsl meta l4proto $icmp_protos limit name lim_icmp_dsl counter name icmp-ratelimit-dsl-tx drop
oifname != dsl meta l4proto $icmp_protos limit name lim_icmp_local counter name icmp-ratelimit-local-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 counter name wg-tx
iifname "yggdrasil-wg-*" meta l4proto gre counter name yggdrasil-gre-tx
meta protocol ip6 udp sport 546 udp dport 547 counter name ipv6-pd-tx
udp sport 123 counter name ntp-tx accept
udp sport 67 counter name dhcp-tx accept
udp sport { 137, 138, 3702 } counter name samba-tx accept
tcp sport { 445, 139, 5357 } counter name samba-tx accept
tcp sport 80 counter name http-tx accept
counter name tx
}
}
table ip nat {
counter dsl-nat {}
chain postrouting {
type nat hook postrouting priority srcnat
policy accept
oifname dsl counter name dsl-nat masquerade
}
}
table ip mss_clamp {
counter dsl-mss-clamp {}
chain postrouting {
type filter hook postrouting priority mangle
policy accept
oifname dsl tcp flags & (syn|rst) == syn counter name dsl-mss-clamp tcp option maxseg size set rt mtu
}
}
|
