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",
76 ".description": "Ensure that CIDRs with negative bitcount are properly translated",
78 "name": "Mask rule #3",
85 ".description": "Ensure that masked IPs are properly handled in reflection rules",
87 "name": "Mask rule #3",
90 "src_ip": "::1/::ffff",
91 "src_dip": "::9/::ffff",
95 "reflection_zone": [ "lan", "guest" ]
115 define wan_devices = { "pppoe-wan" }
116 define wan_subnets = { 2001:db8:54:321::/64 }
117 define lan_devices = { "br-lan" }
118 define lan_subnets = { 10.0.0.0/24, 192.168.26.0/24, 2001:db8:1000::/60, fd63:e2f:f706::/60 }
119 define guest_devices = { "br-guest" }
120 define guest_subnets = { 10.1.0.0/24, 192.168.27.0/24, 2001:db8:1000::/60, fd63:e2f:f706::/60 }
126 include "/etc/nftables.d/*.nft"
134 type filter hook input priority filter; policy drop;
136 iifname "lo" accept comment "!fw4: Accept traffic from loopback"
138 ct state established,related accept comment "!fw4: Allow inbound established and related flows"
139 iifname "pppoe-wan" jump input_wan comment "!fw4: Handle wan IPv4/IPv6 input traffic"
140 iifname "br-lan" jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
141 iifname "br-guest" jump input_guest comment "!fw4: Handle guest IPv4/IPv6 input traffic"
145 type filter hook forward priority filter; policy drop;
147 ct state established,related accept comment "!fw4: Allow forwarded established and related flows"
148 iifname "pppoe-wan" jump forward_wan comment "!fw4: Handle wan IPv4/IPv6 forward traffic"
149 iifname "br-lan" jump forward_lan comment "!fw4: Handle lan IPv4/IPv6 forward traffic"
150 iifname "br-guest" jump forward_guest comment "!fw4: Handle guest IPv4/IPv6 forward traffic"
154 type filter hook output priority filter; policy drop;
156 oifname "lo" accept comment "!fw4: Accept traffic towards loopback"
158 ct state established,related accept comment "!fw4: Allow outbound established and related flows"
159 ip6 saddr & ::ffff == ::1 ip6 daddr & ::ffff != ::2 counter comment "!fw4: Mask rule #1"
160 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"
161 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"
162 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"
163 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"
164 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"
165 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"
166 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"
167 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"
168 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"
169 ip6 saddr & ::ffff:ffff:ffff:ffff == ::1 ip6 daddr & ::ffff:ffff:ffff:ffff != ::2 counter comment "!fw4: Mask rule #3"
170 oifname "pppoe-wan" jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
171 oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
172 oifname "br-guest" jump output_guest comment "!fw4: Handle guest IPv4/IPv6 output traffic"
175 chain handle_reject {
176 meta l4proto tcp reject with tcp reset comment "!fw4: Reject TCP traffic"
177 reject with icmpx type port-unreachable comment "!fw4: Reject any other traffic"
181 ct status dnat accept comment "!fw4: Accept port redirections"
190 ct status dnat accept comment "!fw4: Accept port forwards"
194 chain drop_from_wan {
195 iifname "pppoe-wan" counter drop comment "!fw4: drop wan IPv4/IPv6 traffic"
199 oifname "pppoe-wan" counter drop comment "!fw4: drop wan IPv4/IPv6 traffic"
203 ct status dnat accept comment "!fw4: Accept port redirections"
212 ct status dnat accept comment "!fw4: Accept port forwards"
216 chain drop_from_lan {
217 iifname "br-lan" counter drop comment "!fw4: drop lan IPv4/IPv6 traffic"
221 oifname "br-lan" counter drop comment "!fw4: drop lan IPv4/IPv6 traffic"
225 ct status dnat accept comment "!fw4: Accept port redirections"
233 chain forward_guest {
234 ct status dnat accept comment "!fw4: Accept port forwards"
238 chain drop_from_guest {
239 iifname "br-guest" counter drop comment "!fw4: drop guest IPv4/IPv6 traffic"
242 chain drop_to_guest {
243 oifname "br-guest" counter drop comment "!fw4: drop guest IPv4/IPv6 traffic"
252 type nat hook prerouting priority dstnat; policy accept;
253 iifname "pppoe-wan" jump dstnat_wan comment "!fw4: Handle wan IPv4/IPv6 dstnat traffic"
254 iifname "br-lan" jump dstnat_lan comment "!fw4: Handle lan IPv4/IPv6 dstnat traffic"
255 iifname "br-guest" jump dstnat_guest comment "!fw4: Handle guest IPv4/IPv6 dstnat traffic"
259 type nat hook postrouting priority srcnat; policy accept;
260 oifname "pppoe-wan" jump srcnat_wan comment "!fw4: Handle wan IPv4/IPv6 srcnat traffic"
261 oifname "br-lan" jump srcnat_lan comment "!fw4: Handle lan IPv4/IPv6 srcnat traffic"
262 oifname "br-guest" jump srcnat_guest comment "!fw4: Handle guest IPv4/IPv6 srcnat traffic"
266 ip6 saddr & ::ffff == ::1 ip6 daddr & ::ffff == ::9 counter dnat ::99 comment "!fw4: Mask rule #3"
270 meta nfproto ipv6 masquerade comment "!fw4: Masquerade IPv6 wan traffic"
274 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr & ::ffff == ::9 dnat ::99 comment "!fw4: Mask rule #3 (reflection)"
278 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr ::99 snat 2001:db8:1000:1::1 comment "!fw4: Mask rule #3 (reflection)"
282 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr & ::ffff == ::9 dnat ::99 comment "!fw4: Mask rule #3 (reflection)"
286 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr ::99 snat 2001:db8:1000:2::1 comment "!fw4: Mask rule #3 (reflection)"
291 # Raw rules (notrack & helper)
294 chain raw_prerouting {
295 type filter hook prerouting priority raw; policy accept;
299 type filter hook output priority raw; policy accept;
307 chain mangle_prerouting {
308 type filter hook prerouting priority mangle; policy accept;
311 chain mangle_postrouting {
312 type filter hook postrouting priority mangle; policy accept;
316 type filter hook input priority mangle; policy accept;
319 chain mangle_output {
320 type filter hook output priority mangle; policy accept;
323 chain mangle_forward {
324 type filter hook forward priority mangle; policy accept;