tests/03_rules/07_redirect

   1 Test various address selection rules in redirect rules.
   2
   3 -- Testcase --
   4 {%
   5         include("./root/usr/share/firewall4/main.uc", {
   6                 getenv: function(varname) {
   7                         switch (varname) {
   8                         case 'ACTION':
   9                                 return 'print';
  10                         }
  11                 }
  12         })
  13 %}
  14 -- End --
  15
  16 -- File uci/helpers.json --
  17 {}
  18 -- End --
  19
  20 -- File uci/firewall.json --
  21 {
  22         "zone": [
  23                 {
  24                         "name": "wan",
  25                         "network": [ "wan", "wan6" ],
  26                         "masq": 1,
  27                         "masq6": 1
  28                 },
  29                 {
  30                         "name": "lan",
  31                         "network": "lan",
  32                         "auto_helper": 0
  33                 },
  34                 {
  35                         "name": "noaddr",
  36                         "network": [ "noaddr" ],
  37                         "masq": 1,
  38                         "masq6": 1
  39                 }
  40         ],
  41         "redirect": [
  42                 {
  43                         ".description": "Ensure unspecified family with no src, dest or rewrite address is treated as IPv4 only",
  44                         "name": "Redirect test #1",
  45                         "src": "lan",
  46                         "dest": "wan",
  47                         "proto": "udp",
  48                         "src_dport": "53",
  49                         "dest_port": "53",
  50                         "target": "dnat"
  51                 },
  52                 {
  53                         ".description": "Ensure that explicit family any with no src, dest or rewrite address is treated as IPv4/IPv6",
  54                         "name": "Redirect test #2",
  55                         "family": "any",
  56                         "src": "lan",
  57                         "dest": "wan",
  58                         "proto": "udp",
  59                         "src_dport": "53",
  60                         "dest_port": "53",
  61                         "target": "dnat"
  62                 },
  63                 {
  64                         ".description": "Ensure that a DNAT without explicit dest zone infers the zone from the rewrite address",
  65                         "name": "Redirect test #3",
  66                         "src": "wan",
  67                         "proto": "tcp",
  68                         "src_dport": "22",
  69                         "dest_ip": "192.168.26.100"
  70                 },
  71                 {
  72                         ".description": "Ensure that external reflection source uses the src zone addr as reflection source IP",
  73                         "name": "Redirect test #4",
  74                         "src": "wan",
  75                         "proto": "tcp",
  76                         "src_dport": "23",
  77                         "dest_ip": "192.168.26.100",
  78                         "reflection_src": "external"
  79                 },
  80                 {
  81                         ".description": "Ensure that reflection is disabled if external address cannot be determined",
  82                         "name": "Redirect test #5",
  83                         "src": "noaddr",
  84                         "dest": "lan",
  85                         "proto": "tcp",
  86                         "src_dport": "24",
  87                         "dest_ip": "192.168.26.100"
  88                 },
  89                 {
  90                         ".description": "Ensure that the rewrite IPv6 address is using bracket notation when a port is specified",
  91                         "name": "Redirect test #6",
  92                         "family": "ipv6",
  93                         "src": "wan",
  94                         "dest": "lan",
  95                         "proto": "tcp",
  96                         "src_dport": "25",
  97                         "dest_ip": "2001:db8:1000:1::1234",
  98                         "dest_port": "25",
  99                         "target": "dnat"
 100                 }
 101         ]
 102 }
 103 -- End --
 104
 105 -- Expect stderr --
 106 [!] Section @redirect[2] (Redirect test #3) does not specify a destination, assuming 'lan'
 107 [!] Section @redirect[3] (Redirect test #4) does not specify a destination, assuming 'lan'
 108 [!] Section @redirect[4] (Redirect test #5) external address range cannot be determined, disabling reflection
 109 -- End --
 110
 111 -- Expect stdout --
 112 table inet fw4
 113 flush table inet fw4
 114
 115 table inet fw4 {
 116         #
 117         # Set definitions
 118         #
 119
 120
 121         #
 122         # Defines
 123         #
 124
 125         define wan_devices = { "pppoe-wan" }
 126         define wan_subnets = { 10.11.12.0/24, 2001:db8:54:321::/64 }
 127         define lan_devices = { "br-lan" }
 128         define lan_subnets = { 10.0.0.0/24, 192.168.26.0/24, 2001:db8:1000::/60, fd63:e2f:f706::/60 }
 129         define noaddr_devices = { "wwan0" }
 130
 131         #
 132         # User includes
 133         #
 134
 135         include "/etc/nftables.d/*.nft"
 136
 137
 138         #
 139         # Filter rules
 140         #
 141
 142         chain input {
 143                 type filter hook input priority filter; policy drop;
 144
 145                 iifname "lo" accept comment "!fw4: Accept traffic from loopback"
 146
 147                 ct state established,related accept comment "!fw4: Allow inbound established and related flows"
 148                 iifname "pppoe-wan" jump input_wan comment "!fw4: Handle wan IPv4/IPv6 input traffic"
 149                 iifname "br-lan" jump input_lan comment "!fw4: Handle lan IPv4/IPv6 input traffic"
 150                 iifname "wwan0" jump input_noaddr comment "!fw4: Handle noaddr IPv4/IPv6 input traffic"
 151         }
 152
 153         chain forward {
 154                 type filter hook forward priority filter; policy drop;
 155
 156                 ct state established,related accept comment "!fw4: Allow forwarded established and related flows"
 157                 iifname "pppoe-wan" jump forward_wan comment "!fw4: Handle wan IPv4/IPv6 forward traffic"
 158                 iifname "br-lan" jump forward_lan comment "!fw4: Handle lan IPv4/IPv6 forward traffic"
 159                 iifname "wwan0" jump forward_noaddr comment "!fw4: Handle noaddr IPv4/IPv6 forward traffic"
 160         }
 161
 162         chain output {
 163                 type filter hook output priority filter; policy drop;
 164
 165                 oifname "lo" accept comment "!fw4: Accept traffic towards loopback"
 166
 167                 ct state established,related accept comment "!fw4: Allow outbound established and related flows"
 168                 oifname "pppoe-wan" jump output_wan comment "!fw4: Handle wan IPv4/IPv6 output traffic"
 169                 oifname "br-lan" jump output_lan comment "!fw4: Handle lan IPv4/IPv6 output traffic"
 170                 oifname "wwan0" jump output_noaddr comment "!fw4: Handle noaddr IPv4/IPv6 output traffic"
 171         }
 172
 173         chain handle_reject {
 174                 meta l4proto tcp reject with tcp reset comment "!fw4: Reject TCP traffic"
 175                 reject with icmpx type port-unreachable comment "!fw4: Reject any other traffic"
 176         }
 177
 178         chain input_wan {
 179                 ct status dnat accept comment "!fw4: Accept port redirections"
 180                 jump drop_from_wan
 181         }
 182
 183         chain output_wan {
 184                 jump drop_to_wan
 185         }
 186
 187         chain forward_wan {
 188                 ct status dnat accept comment "!fw4: Accept port forwards"
 189                 jump drop_to_wan
 190         }
 191
 192         chain drop_from_wan {
 193                 iifname "pppoe-wan" counter drop comment "!fw4: drop wan IPv4/IPv6 traffic"
 194         }
 195
 196         chain drop_to_wan {
 197                 oifname "pppoe-wan" counter drop comment "!fw4: drop wan IPv4/IPv6 traffic"
 198         }
 199
 200         chain input_lan {
 201                 ct status dnat accept comment "!fw4: Accept port redirections"
 202                 jump drop_from_lan
 203         }
 204
 205         chain output_lan {
 206                 jump drop_to_lan
 207         }
 208
 209         chain forward_lan {
 210                 ct status dnat accept comment "!fw4: Accept port forwards"
 211                 jump drop_to_lan
 212         }
 213
 214         chain accept_to_lan {
 215                 oifname "br-lan" counter accept comment "!fw4: accept lan IPv4/IPv6 traffic"
 216         }
 217
 218         chain drop_from_lan {
 219                 iifname "br-lan" counter drop comment "!fw4: drop lan IPv4/IPv6 traffic"
 220         }
 221
 222         chain drop_to_lan {
 223                 oifname "br-lan" counter drop comment "!fw4: drop lan IPv4/IPv6 traffic"
 224         }
 225
 226         chain input_noaddr {
 227                 ct status dnat accept comment "!fw4: Accept port redirections"
 228                 jump drop_from_noaddr
 229         }
 230
 231         chain output_noaddr {
 232                 jump drop_to_noaddr
 233         }
 234
 235         chain forward_noaddr {
 236                 ct status dnat accept comment "!fw4: Accept port forwards"
 237                 jump drop_to_noaddr
 238         }
 239
 240         chain drop_from_noaddr {
 241                 iifname "wwan0" counter drop comment "!fw4: drop noaddr IPv4/IPv6 traffic"
 242         }
 243
 244         chain drop_to_noaddr {
 245                 oifname "wwan0" counter drop comment "!fw4: drop noaddr IPv4/IPv6 traffic"
 246         }
 247
 248
 249         #
 250         # NAT rules
 251         #
 252
 253         chain dstnat {
 254                 type nat hook prerouting priority dstnat; policy accept;
 255                 iifname "pppoe-wan" jump dstnat_wan comment "!fw4: Handle wan IPv4/IPv6 dstnat traffic"
 256                 iifname "br-lan" jump dstnat_lan comment "!fw4: Handle lan IPv4/IPv6 dstnat traffic"
 257                 iifname "wwan0" jump dstnat_noaddr comment "!fw4: Handle noaddr IPv4/IPv6 dstnat traffic"
 258         }
 259
 260         chain srcnat {
 261                 type nat hook postrouting priority srcnat; policy accept;
 262                 oifname "pppoe-wan" jump srcnat_wan comment "!fw4: Handle wan IPv4/IPv6 srcnat traffic"
 263                 oifname "br-lan" jump srcnat_lan comment "!fw4: Handle lan IPv4/IPv6 srcnat traffic"
 264                 oifname "wwan0" jump srcnat_noaddr comment "!fw4: Handle noaddr IPv4/IPv6 srcnat traffic"
 265         }
 266
 267         chain dstnat_wan {
 268                 meta nfproto ipv4 tcp dport 22 counter dnat 192.168.26.100:22 comment "!fw4: Redirect test #3"
 269                 meta nfproto ipv4 tcp dport 23 counter dnat 192.168.26.100:23 comment "!fw4: Redirect test #4"
 270                 meta nfproto ipv6 tcp dport 25 counter dnat [2001:db8:1000:1::1234]:25 comment "!fw4: Redirect test #6"
 271         }
 272
 273         chain srcnat_wan {
 274                 meta nfproto ipv4 masquerade comment "!fw4: Masquerade IPv4 wan traffic"
 275                 meta nfproto ipv6 masquerade comment "!fw4: Masquerade IPv6 wan traffic"
 276         }
 277
 278         chain dstnat_lan {
 279                 meta nfproto ipv4 udp dport 53 counter redirect to 53 comment "!fw4: Redirect test #1"
 280                 udp dport 53 counter redirect to 53 comment "!fw4: Redirect test #2"
 281                 ip saddr { 10.0.0.0/24, 192.168.26.0/24 } ip daddr 10.11.12.194 tcp dport 22 dnat 192.168.26.100:22 comment "!fw4: Redirect test #3 (reflection)"
 282                 ip saddr { 10.0.0.0/24, 192.168.26.0/24 } ip daddr 10.11.12.194 tcp dport 23 dnat 192.168.26.100:23 comment "!fw4: Redirect test #4 (reflection)"
 283                 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr 2001:db8:54:321::2 tcp dport 25 dnat [2001:db8:1000:1::1234]:25 comment "!fw4: Redirect test #6 (reflection)"
 284         }
 285
 286         chain srcnat_lan {
 287                 ip saddr { 10.0.0.0/24, 192.168.26.0/24 } ip daddr 192.168.26.100 tcp dport 22 snat 192.168.26.1 comment "!fw4: Redirect test #3 (reflection)"
 288                 ip saddr { 10.0.0.0/24, 192.168.26.0/24 } ip daddr 192.168.26.100 tcp dport 23 snat 10.11.12.194 comment "!fw4: Redirect test #4 (reflection)"
 289                 ip6 saddr { 2001:db8:1000::/60, fd63:e2f:f706::/60 } ip6 daddr 2001:db8:1000:1::1234 tcp dport 25 snat 2001:db8:1000:1::1 comment "!fw4: Redirect test #6 (reflection)"
 290         }
 291
 292         chain dstnat_noaddr {
 293                 meta nfproto ipv4 tcp dport 24 counter dnat 192.168.26.100:24 comment "!fw4: Redirect test #5"
 294         }
 295
 296         chain srcnat_noaddr {
 297                 meta nfproto ipv4 masquerade comment "!fw4: Masquerade IPv4 noaddr traffic"
 298                 meta nfproto ipv6 masquerade comment "!fw4: Masquerade IPv6 noaddr traffic"
 299         }
 300
 301
 302         #
 303         # Raw rules (notrack & helper)
 304         #
 305
 306         chain raw_prerouting {
 307                 type filter hook prerouting priority raw; policy accept;
 308         }
 309
 310         chain raw_output {
 311                 type filter hook output priority raw; policy accept;
 312         }
 313
 314
 315         #
 316         # Mangle rules
 317         #
 318
 319         chain mangle_prerouting {
 320                 type filter hook prerouting priority mangle; policy accept;
 321         }
 322
 323         chain mangle_postrouting {
 324                 type filter hook postrouting priority mangle; policy accept;
 325         }
 326
 327         chain mangle_input {
 328                 type filter hook input priority mangle; policy accept;
 329         }
 330
 331         chain mangle_output {
 332                 type filter hook output priority mangle; policy accept;
 333         }
 334
 335         chain mangle_forward {
 336                 type filter hook forward priority mangle; policy accept;
 337         }
 338 }
 339 -- End --