1 Test that non-contiguous subnet masks are properly handled in rule source
2 or destination IP expressions. Such masks need to be translated into
3 bitwise expressions which may not appear as part of sets, so various
4 permutations of rules need to be emitted.
8 include("./root/usr/share/firewall4/main.uc", {
9 getenv: function(varname) {
19 -- File uci/helpers.json --
23 -- File uci/firewall.json --
44 ".description": "Ensure that IPs with non-contiguous masks are properly translated",
46 "name": "Mask rule #1",
47 "src_ip": "::1/::ffff",
48 "dest_ip": "!::2/::ffff"
51 ".description": "Ensure that combinations of multiple masked and not masked IPs yield the proper rule permutations",
53 "name": "Mask rule #2",
78 ".description": "Ensure that masked IPs are properly handled in reflection rules",
80 "name": "Mask rule #3",
83 "src_ip": "::1/::ffff",
84 "src_dip": "::9/::ffff",
88 "reflection_zone": [ "lan", "guest" ]
108 define wan_devices = { "eth1" }
109 define wan_subnets = { 2001:db8:54:321::/64 }
110 define lan_devices = { "br-lan" }
111 define lan_subnets = { 10.0.0.0/24, 192.168.26.0/24, 2001:db8:1000::/60, fd63:e2f:f706::/60 }
112 define guest_devices = { "br-guest" }
113 define guest_subnets = { 10.1.0.0/24, 192.168.27.0/24, 2001:db8:1000::/60, fd63:e2f:f706::/60 }
119 include "/etc/nftables.d/*.nft"
127 type filter hook input priority filter; policy drop;
129 iifname "lo" accept comment "!fw4: Accept traffic from loopback"
131 ct state established,related accept comment "!fw4: Allow inbound established and related flows"
132 iifname "eth1" jump input_wan comment "!fw4: Handle wan IPv4/IPv6 input traffic"
133 iifname "br-lan" jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
134 iifname "br-guest" jump input_guest comment "!fw4: Handle guest IPv4/IPv6 input traffic"
138 type filter hook forward priority filter; policy drop;
140 ct state established,related accept comment "!fw4: Allow forwarded established and related flows"
141 iifname "eth1" jump forward_wan comment "!fw4: Handle wan IPv4/IPv6 forward traffic"
142 iifname "br-lan" jump forward_lan comment "!fw4: Handle lan IPv4/IPv6 forward traffic"
143 iifname "br-guest" jump forward_guest comment "!fw4: Handle guest IPv4/IPv6 forward traffic"
147 type filter hook output priority filter; policy drop;
149 oifname "lo" accept comment "!fw4: Accept traffic towards loopback"
151 ct state established,related accept comment "!fw4: Allow outbound established and related flows"
152 ip6 saddr & ::ffff == ::1 ip6 daddr & ::ffff != ::2 counter comment "!fw4: Mask rule #1"
153 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::1 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff == ::9 ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
154 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::1 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff == ::10 ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
155 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::1 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr { ::11, ::12 } ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
156 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::2 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff == ::9 ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
157 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::2 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff == ::10 ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
158 ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff == ::2 ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr { ::11, ::12 } ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
159 ip6 saddr { ::3, ::4 } ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff == ::9 ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
160 ip6 saddr { ::3, ::4 } ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff == ::10 ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
161 ip6 saddr { ::3, ::4 } ip6 saddr != { ::7, ::8 } ip6 saddr & ::ffff != ::5 ip6 saddr & ::ffff != ::6 ip6 daddr { ::11, ::12 } ip6 daddr != { ::15, ::16 } ip6 daddr & ::ffff != ::13 ip6 daddr & ::ffff != ::14 counter comment "!fw4: Mask rule #2"
162 oifname "eth1" jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
163 oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
164 oifname "br-guest" jump output_guest comment "!fw4: Handle guest IPv4/IPv6 output traffic"
167 chain handle_reject {
168 meta l4proto tcp reject with tcp reset comment "!fw4: Reject TCP traffic"
169 reject with icmpx type port-unreachable comment "!fw4: Reject any other traffic"
173 ct status dnat accept comment "!fw4: Accept port redirections"
182 ct status dnat accept comment "!fw4: Accept port forwards"
186 chain drop_from_wan {
187 iifname "eth1" counter drop comment "!fw4: drop wan IPv4/IPv6 traffic"
191 oifname "eth1" counter drop comment "!fw4: drop wan IPv4/IPv6 traffic"
195 ct status dnat accept comment "!fw4: Accept port redirections"
204 ct status dnat accept comment "!fw4: Accept port forwards"
208 chain drop_from_lan {
209 iifname "br-lan" counter drop comment "!fw4: drop lan IPv4/IPv6 traffic"
213 oifname "br-lan" counter drop comment "!fw4: drop lan IPv4/IPv6 traffic"
217 ct status dnat accept comment "!fw4: Accept port redirections"
225 chain forward_guest {
226 ct status dnat accept comment "!fw4: Accept port forwards"
230 chain drop_from_guest {
231 iifname "br-guest" counter drop comment "!fw4: drop guest IPv4/IPv6 traffic"
234 chain drop_to_guest {
235 oifname "br-guest" counter drop comment "!fw4: drop guest IPv4/IPv6 traffic"
244 type nat hook prerouting priority dstnat; policy accept;
245 iifname "eth1" jump dstnat_wan comment "!fw4: Handle wan IPv4/IPv6 dstnat traffic"
246 iifname "br-lan" jump dstnat_lan comment "!fw4: Handle lan IPv4/IPv6 dstnat traffic"
247 iifname "br-guest" jump dstnat_guest comment "!fw4: Handle guest IPv4/IPv6 dstnat traffic"
251 type nat hook postrouting priority srcnat; policy accept;
252 oifname "eth1" jump srcnat_wan comment "!fw4: Handle wan IPv4/IPv6 srcnat traffic"
253 oifname "br-lan" jump srcnat_lan comment "!fw4: Handle lan IPv4/IPv6 srcnat traffic"
254 oifname "br-guest" jump srcnat_guest comment "!fw4: Handle guest IPv4/IPv6 srcnat traffic"
258 ip6 saddr & ::ffff == ::1 ip6 daddr & ::ffff == ::9 counter dnat ::99 comment "!fw4: Mask rule #3"
262 meta nfproto ipv6 masquerade comment "!fw4: Masquerade IPv6 wan traffic"
266 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr & ::ffff == ::9 dnat ::99 comment "!fw4: Mask rule #3 (reflection)"
270 ip6 saddr 2001:db8:1000::/60 ip6 daddr ::99 snat 2001:db8:1000:1::1 comment "!fw4: Mask rule #3 (reflection)"
271 ip6 saddr fd63:e2f:f706::/60 ip6 daddr ::99 snat fd63:e2f:f706:1::1 comment "!fw4: Mask rule #3 (reflection)"
275 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr & ::ffff == ::9 dnat ::99 comment "!fw4: Mask rule #3 (reflection)"
279 ip6 saddr 2001:db8:1000::/60 ip6 daddr ::99 snat 2001:db8:1000:2::1 comment "!fw4: Mask rule #3 (reflection)"
280 ip6 saddr fd63:e2f:f706::/60 ip6 daddr ::99 snat fd63:e2f:f706:2::1 comment "!fw4: Mask rule #3 (reflection)"
285 # Raw rules (notrack & helper)
288 chain raw_prerouting {
289 type filter hook prerouting priority raw; policy accept;
293 type filter hook output priority raw; policy accept;
301 chain mangle_prerouting {
302 type filter hook prerouting priority mangle; policy accept;
305 chain mangle_postrouting {
306 type filter hook postrouting priority mangle; policy accept;
310 type filter hook input priority mangle; policy accept;
313 chain mangle_output {
314 type filter hook output priority mangle; policy accept;
317 chain mangle_forward {
318 type filter hook forward priority mangle; policy accept;