From 68728014435d9141aad4498e085a0a6a1d21c2f5 Mon Sep 17 00:00:00 2001 From: Florian Westphal Date: Tue, 12 Sep 2023 11:41:00 +0200 Subject: tests: shell: add sample ruleset reproducer Changes on kernel side no longer permit transactions that reference a chain after it is bound. This test case breaks when run with nftables 1.0.6 and earlier. Keep this as a test case in tree to catch any future problems in this area. Link: https://lore.kernel.org/netfilter-devel/20230911213750.5B4B663206F5@dd20004.kasserver.com/ Signed-off-by: Florian Westphal --- .../shell/testcases/nft-f/dumps/sample-ruleset.nft | 239 +++++++++++++++++++ tests/shell/testcases/nft-f/sample-ruleset | 262 +++++++++++++++++++++ 2 files changed, 501 insertions(+) create mode 100644 tests/shell/testcases/nft-f/dumps/sample-ruleset.nft create mode 100755 tests/shell/testcases/nft-f/sample-ruleset diff --git a/tests/shell/testcases/nft-f/dumps/sample-ruleset.nft b/tests/shell/testcases/nft-f/dumps/sample-ruleset.nft new file mode 100644 index 00000000..480b694a --- /dev/null +++ b/tests/shell/testcases/nft-f/dumps/sample-ruleset.nft @@ -0,0 +1,239 @@ +table inet filter { + map if_input { + type ifname : verdict + elements = { "eth0" : jump public_input, + "eth1" : jump home_input, + "eth2.10" : jump home_input, + "eth2.20" : jump home_input } + } + + map if_forward { + type ifname : verdict + elements = { "eth0" : jump public_forward, + "eth1" : jump trusted_forward, + "eth2.10" : jump voip_forward, + "eth2.20" : jump guest_forward } + } + + map if_output { + type ifname : verdict + elements = { "eth0" : jump public_output, + "eth1" : jump home_output, + "eth2.10" : jump home_output, + "eth2.20" : jump home_output } + } + + set ipv4_blacklist { + type ipv4_addr + flags interval + auto-merge + } + + set ipv6_blacklist { + type ipv6_addr + flags interval + auto-merge + } + + set limit_src_ip { + type ipv4_addr + size 1024 + flags dynamic,timeout + } + + set limit_src_ip6 { + type ipv6_addr + size 1024 + flags dynamic,timeout + } + + chain PREROUTING_RAW { + type filter hook prerouting priority raw; policy accept; + meta l4proto != { icmp, tcp, udp, ipv6-icmp } counter packets 0 bytes 0 drop + tcp flags syn jump { + tcp option maxseg size 1-500 counter packets 0 bytes 0 drop + tcp sport 0 counter packets 0 bytes 0 drop + } + rt type 0 counter packets 0 bytes 0 drop + } + + chain PREROUTING_MANGLE { + type filter hook prerouting priority mangle; policy accept; + ct state vmap { invalid : jump ct_invalid_pre, related : jump rpfilter, new : jump ct_new_pre, untracked : jump ct_untracked_pre } + } + + chain ct_invalid_pre { + counter packets 0 bytes 0 drop + } + + chain ct_untracked_pre { + icmpv6 type { mld-listener-query, nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, mld2-listener-report } return + counter packets 0 bytes 0 drop + } + + chain ct_new_pre { + jump rpfilter + tcp flags != syn / fin,syn,rst,ack counter packets 0 bytes 0 drop + iifname "eth0" meta nfproto vmap { ipv4 : jump blacklist_input_ipv4, ipv6 : jump blacklist_input_ipv6 } + } + + chain rpfilter { + ip saddr 0.0.0.0 ip daddr 255.255.255.255 udp sport 68 udp dport 67 return + ip6 saddr :: ip6 daddr . icmpv6 type { ff02::1:ff00:0/104 . nd-neighbor-solicit, ff02::16 . mld2-listener-report } return + fib saddr . iif oif 0 counter packets 0 bytes 0 drop + } + + chain blacklist_input_ipv4 { + ip saddr { 0.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.0.0.0/24, 192.0.2.0/24, 192.168.0.0/16, 198.18.0.0/15, 198.51.100.0/24, 203.0.113.0/24, 224.0.0.0/3 } counter packets 0 bytes 0 drop + ip saddr @ipv4_blacklist counter packets 0 bytes 0 drop + } + + chain blacklist_input_ipv6 { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 saddr fe80::/64 return + udp sport 547 ip6 saddr fe80::/64 return + ip6 saddr { ::/3, 2001::/32, 2001:2::/48, 2001:3::/32, 2001:10::-2001:2f:ffff:ffff:ffff:ffff:ffff:ffff, 2001:db8::/32, 2002::/16, 3000::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff } counter packets 0 bytes 0 drop + ip6 saddr @ipv6_blacklist counter packets 0 bytes 0 drop + } + + chain INPUT { + type filter hook input priority filter; policy drop; + iif "lo" accept + ct state established,related accept + iifname vmap @if_input + log prefix "NFT REJECT IN " flags ip options flags ether limit rate 5/second burst 10 packets reject + } + + chain public_input { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 saddr fe80::/64 ip6 hoplimit 255 accept + udp sport 547 udp dport 546 ip6 saddr fe80::/64 accept + fib daddr type { broadcast, anycast, multicast } counter packets 0 bytes 0 drop + counter packets 0 bytes 0 drop + } + + chain home_input { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept + icmpv6 type { mld-listener-query, mld2-listener-report } ip6 hoplimit 1 accept + udp sport 68 udp dport 67 accept + udp sport 546 udp dport 547 iifname { "eth1", "eth2.10", "eth2.20" } accept + fib daddr type { broadcast, anycast, multicast } counter packets 0 bytes 0 drop + icmp type echo-request accept + icmpv6 type echo-request accept + tcp dport 22 iifname "eth1" accept + meta l4proto { tcp, udp } th dport 53 jump { + ip6 saddr != { fd00::/8, fe80::/64 } counter packets 0 bytes 0 reject with icmpv6 port-unreachable + accept + } + udp dport 123 accept + tcp dport 8443 accept + } + + chain FORWARD_MANGLE { + type filter hook forward priority mangle; policy accept; + oifname "eth0" jump { + ct state new meta nfproto vmap { ipv4 : jump blacklist_output_ipv4, ipv6 : jump blacklist_output_ipv6 } + tcp flags syn / syn,rst tcp option maxseg size set rt mtu + } + } + + chain blacklist_output_ipv4 { + ip daddr { 0.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.0.0.0/24, 192.0.2.0/24, 192.168.0.0/16, 198.18.0.0/15, 198.51.100.0/24, 203.0.113.0/24, 224.0.0.0/3 } goto log_blacklist + ip daddr @ipv4_blacklist goto log_blacklist + } + + chain blacklist_output_ipv6 { + icmpv6 type . ip6 daddr { nd-router-solicit . ff02::2, nd-neighbor-solicit . ff02::1:ff00:0/104, nd-neighbor-advert . fe80::/64, nd-neighbor-advert . ff02::1, nd-neighbor-advert . ff02::1:ff00:0/104, mld2-listener-report . ff02::16 } return + udp dport 547 ip6 daddr ff02::1:2 return + ip6 daddr { ::/3, 2001::/32, 2001:2::/48, 2001:3::/32, 2001:10::-2001:2f:ffff:ffff:ffff:ffff:ffff:ffff, 2001:db8::/32, 2002::/16, 3000::-ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff } goto log_blacklist + ip6 daddr @ipv6_blacklist goto log_blacklist + } + + chain log_blacklist { + log prefix "NFT BLACKLIST " flags ip options flags ether limit rate 5/minute burst 10 packets drop + counter packets 0 bytes 0 drop + } + + chain FORWARD { + type filter hook forward priority filter; policy drop; + ct state established,related accept + fib daddr type { broadcast, anycast, multicast } counter packets 0 bytes 0 drop + iifname vmap @if_forward + log prefix "NFT REJECT FWD " flags ip options flags ether limit rate 5/second burst 10 packets reject + } + + chain public_forward { + udp dport { 5060, 7078-7097 } oifname "eth2.10" jump { + ip6 saddr { 2001:db8::1-2001:db8::2 } accept + meta nfproto ipv6 log prefix "NFT DROP SIP " flags ip options flags ether limit rate 5/second burst 10 packets drop + } + counter packets 0 bytes 0 drop + } + + chain trusted_forward { + oifname "eth0" accept + icmp type echo-request accept + icmpv6 type echo-request accept + ip daddr { 192.168.3.30, 192.168.4.40 } tcp dport vmap { 22 : accept, 80 : drop, 443 : accept } + ip daddr 192.168.2.20 jump { + tcp dport { 80, 443, 515, 631, 9100 } accept + udp dport 161 accept + } + } + + chain voip_forward { + icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, echo-request } oifname "eth0" accept + ip6 daddr { 2001:db8::1-2001:db8::2 } jump { + udp dport { 3478, 5060 } accept + udp sport 7078-7097 accept + tcp dport 5061 accept + } + tcp dport 587 ip daddr 10.0.0.1 accept + tcp dport 80 oifname "eth0" counter packets 0 bytes 0 reject + } + + chain guest_forward { + oifname "eth0" accept + } + + chain OUTPUT { + type filter hook output priority filter; policy drop; + oif "lo" accept + ct state vmap { invalid : jump ct_invalid_out, established : accept, related : accept, untracked : jump ct_untracked_out } + oifname vmap @if_output + log prefix "NFT REJECT OUT " flags ip options flags ether limit rate 5/second burst 10 packets reject + } + + chain ct_invalid_out { + counter packets 0 bytes 0 drop + } + + chain ct_untracked_out { + icmpv6 type { mld-listener-query, nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, mld2-listener-report } return + counter packets 0 bytes 0 drop + } + + chain public_output { + ct state new meta nfproto vmap { ipv4 : jump blacklist_output_ipv4, ipv6 : jump blacklist_output_ipv6 } + icmp type { destination-unreachable, echo-request, time-exceeded, parameter-problem } accept + icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, echo-request } accept + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept + icmpv6 type { mld-listener-query, mld2-listener-report } ip6 hoplimit 1 accept + udp dport 547 ip6 saddr fe80::/64 ip6 daddr ff02::1:2 accept + udp dport { 53, 123 } accept + tcp dport { 443, 587, 853 } accept + } + + chain home_output { + icmp type { destination-unreachable, echo-request, time-exceeded, parameter-problem } accept + icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, echo-request } accept + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept + icmpv6 type { mld-listener-query, mld2-listener-report } ip6 hoplimit 1 accept + udp sport 547 udp dport 546 ip6 saddr fe80::/64 oifname { "eth1", "eth2.10", "eth2.20" } accept + udp sport 67 udp dport 68 ip saddr { 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 } accept + tcp dport 22 ip daddr 192.168.1.10 accept + } + + chain POSTROUTING_SRCNAT { + type nat hook postrouting priority srcnat; policy accept; + ip saddr { 192.168.1.0-192.168.4.255 } oifname "eth0" masquerade + } +} diff --git a/tests/shell/testcases/nft-f/sample-ruleset b/tests/shell/testcases/nft-f/sample-ruleset new file mode 100755 index 00000000..8cee74b9 --- /dev/null +++ b/tests/shell/testcases/nft-f/sample-ruleset @@ -0,0 +1,262 @@ +#!/bin/bash + +# NFT_TEST_REQUIRES(NFT_TEST_HAVE_chain_binding) + +$NFT -f /dev/stdin <<"EOF" +define public_if = eth0 +define trusted_if = eth1 +define voip_if = eth2.10 +define guest_if = eth2.20 +define home_if = { $trusted_if, $voip_if, $guest_if } +define home_ipv6_if = { $trusted_if, $voip_if, $guest_if } + +define masq_ip = { 192.168.1.0/24, 192.168.2.0/24, 192.168.3.0/24, 192.168.4.0/24 } +define masq_if = $public_if + +define host1_ip = 192.168.1.10 +define host2_ip = 192.168.2.20 +define host3_ip = 192.168.3.30 +define host4_ip = 192.168.4.40 + +define proxy_port = 8443 + +define private_ip = { 192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8 } +define private_ip6 = { fe80::/64, fd00::/8 } +define bogons_ip = { 0.0.0.0/8, 10.0.0.0/8, 100.64.0.0/10, 127.0.0.0/8, 169.254.0.0/16, 172.16.0.0/12, 192.0.0.0/24, 192.0.2.0/24, 192.168.0.0/16, 198.18.0.0/15, 198.51.100.0/24, 203.0.113.0/24, 224.0.0.0/3 } +define bogons_ip6 = { ::/3, 2001:0002::/48, 2001:0003::/32, 2001:10::/28, 2001:20::/28, 2001::/32, 2001:db8::/32, 2002::/16, 3000::/4, 4000::/2, 8000::/1 } + +define sip_whitelist_ip6 = { 2001:db8::1/128, 2001:db8::2/128 } +define smtps_whitelist_ip = 10.0.0.1 +define protocol_whitelist = { tcp, udp, icmp, ipv6-icmp } + +table inet filter { + map if_input { + type ifname : verdict; + elements = { $public_if : jump public_input, $trusted_if : jump home_input, $voip_if : jump home_input, $guest_if : jump home_input } + } + map if_forward { + type ifname : verdict; + elements = { $public_if : jump public_forward, $trusted_if : jump trusted_forward, $voip_if : jump voip_forward, $guest_if : jump guest_forward } + } + map if_output { + type ifname : verdict; + elements = { $public_if : jump public_output, $trusted_if : jump home_output, $voip_if : jump home_output, $guest_if : jump home_output } + } + + set ipv4_blacklist { type ipv4_addr; flags interval; auto-merge; } + set ipv6_blacklist { type ipv6_addr; flags interval; auto-merge; } + set limit_src_ip { type ipv4_addr; flags dynamic, timeout; size 1024; } + set limit_src_ip6 { type ipv6_addr; flags dynamic, timeout; size 1024; } + + chain PREROUTING_RAW { + type filter hook prerouting priority raw; + + meta l4proto != $protocol_whitelist counter drop + tcp flags syn jump { + tcp option maxseg size 1-500 counter drop + tcp sport 0 counter drop + } + rt type 0 counter drop + } + + chain PREROUTING_MANGLE { + type filter hook prerouting priority mangle; + + ct state vmap { invalid : jump ct_invalid_pre, untracked : jump ct_untracked_pre, new : jump ct_new_pre, related : jump rpfilter } + } + chain ct_invalid_pre { + counter drop + } + chain ct_untracked_pre { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, mld-listener-query, mld2-listener-report } return + counter drop + } + chain ct_new_pre { + jump rpfilter + + tcp flags & (fin|syn|rst|ack) != syn counter drop + + iifname $public_if meta nfproto vmap { ipv4 : jump blacklist_input_ipv4, ipv6 : jump blacklist_input_ipv6 } + } + chain rpfilter { + ip saddr 0.0.0.0 ip daddr 255.255.255.255 udp sport bootpc udp dport bootps return + ip6 saddr ::/128 ip6 daddr . icmpv6 type { ff02::1:ff00:0/104 . nd-neighbor-solicit, ff02::16 . mld2-listener-report } return + + fib saddr . iif oif eq 0 counter drop + } + chain blacklist_input_ipv4{ + ip saddr $bogons_ip counter drop + ip saddr @ipv4_blacklist counter drop + } + chain blacklist_input_ipv6{ + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 saddr fe80::/64 return + udp sport dhcpv6-server ip6 saddr fe80::/64 return + + ip6 saddr $bogons_ip6 counter drop + ip6 saddr @ipv6_blacklist counter drop + } + + chain INPUT { + type filter hook input priority filter; policy drop; + + iif lo accept + + ct state established,related accept + + iifname vmap @if_input + + log prefix "NFT REJECT IN " flags ether flags ip options limit rate 5/second burst 10 packets reject + } + chain public_input { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 saddr fe80::/64 ip6 hoplimit 255 accept + + udp sport dhcpv6-server udp dport dhcpv6-client ip6 saddr fe80::/64 accept + fib daddr type { broadcast, multicast, anycast } counter drop + + counter drop + } + chain home_input { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept + icmpv6 type { mld-listener-query, mld2-listener-report } ip6 hoplimit 1 accept + + udp sport bootpc udp dport bootps accept + udp sport dhcpv6-client udp dport dhcpv6-server iifname $home_ipv6_if accept + + fib daddr type { broadcast, multicast, anycast } counter drop + + icmp type echo-request accept + icmpv6 type echo-request accept + + tcp dport ssh iifname $trusted_if accept + + meta l4proto { tcp, udp } th dport domain jump { + ip6 saddr != $private_ip6 counter reject + accept + } + + udp dport ntp accept + + tcp dport $proxy_port accept + } + + chain FORWARD_MANGLE { + type filter hook forward priority mangle; + + oifname $public_if jump { + ct state new meta nfproto vmap { ipv4 : jump blacklist_output_ipv4, ipv6 : jump blacklist_output_ipv6 } + tcp flags & (syn|rst) == syn tcp option maxseg size set rt mtu + } + } + chain blacklist_output_ipv4 { + ip daddr $bogons_ip goto log_blacklist + ip daddr @ipv4_blacklist goto log_blacklist + } + chain blacklist_output_ipv6 { + icmpv6 type . ip6 daddr { nd-router-solicit . ff02::2/128, nd-neighbor-solicit . ff02::1:ff00:0/104, nd-neighbor-advert . fe80::/64, nd-neighbor-advert . ff02::1/128, nd-neighbor-advert . ff02::1:ff00:0/104, mld2-listener-report . ff02::16/128 } return + udp dport dhcpv6-server ip6 daddr ff02::1:2 return + + ip6 daddr $bogons_ip6 goto log_blacklist + ip6 daddr @ipv6_blacklist goto log_blacklist + } + chain log_blacklist { + log prefix "NFT BLACKLIST " flags ether flags ip options limit rate 5/minute burst 10 packets drop + counter drop + } + + chain FORWARD { + type filter hook forward priority filter; policy drop; + + ct state established,related accept + + fib daddr type { broadcast, multicast, anycast } counter drop + + iifname vmap @if_forward + + log prefix "NFT REJECT FWD " flags ether flags ip options limit rate 5/second burst 10 packets reject + } + chain public_forward { + udp dport { sip, 7078-7097 } oifname $voip_if jump { + ip6 saddr $sip_whitelist_ip6 accept + meta nfproto ipv6 log prefix "NFT DROP SIP " flags ether flags ip options limit rate 5/second burst 10 packets drop + } + + counter drop + } + chain trusted_forward { + oifname $public_if accept + + icmp type echo-request accept + icmpv6 type echo-request accept + + ip daddr { $host3_ip, $host4_ip } tcp dport vmap { ssh : accept, https : accept, http : drop } + + ip daddr $host2_ip jump { + tcp dport { http, https, printer, ipp, 9100 } accept + udp dport snmp accept + } + } + chain voip_forward { + icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, echo-request } oifname $public_if accept + + ip6 daddr $sip_whitelist_ip6 jump { + udp dport { 3478, sip } accept + udp sport { 7078-7097 } accept + tcp dport 5061 accept + } + + tcp dport 587 ip daddr $smtps_whitelist_ip accept + tcp dport http oifname $public_if counter reject + } + chain guest_forward { + oifname $public_if accept + } + + chain OUTPUT { + type filter hook output priority filter; policy drop; + + oif lo accept + + ct state vmap { established : accept, related : accept, invalid : jump ct_invalid_out, untracked : jump ct_untracked_out } + + oifname vmap @if_output + + log prefix "NFT REJECT OUT " flags ether flags ip options limit rate 5/second burst 10 packets reject + } + chain ct_invalid_out { + counter drop + } + chain ct_untracked_out { + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, mld-listener-query, mld2-listener-report } return + counter drop + } + chain public_output { + ct state new meta nfproto vmap { ipv4 : jump blacklist_output_ipv4, ipv6 : jump blacklist_output_ipv6 } + + icmp type { destination-unreachable, time-exceeded, parameter-problem, echo-request } accept + icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, echo-request } accept + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept + icmpv6 type { mld-listener-query, mld2-listener-report } ip6 hoplimit 1 accept + + udp dport dhcpv6-server ip6 saddr fe80::/64 ip6 daddr ff02::1:2 accept + + udp dport { domain, ntp } accept + tcp dport { https, 587, domain-s } accept + } + chain home_output { + icmp type { destination-unreachable, time-exceeded, parameter-problem, echo-request } accept + icmpv6 type { destination-unreachable, packet-too-big, time-exceeded, parameter-problem, echo-request } accept + icmpv6 type { nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert } ip6 hoplimit 255 accept + icmpv6 type { mld-listener-query, mld2-listener-report } ip6 hoplimit 1 accept + + udp sport dhcpv6-server udp dport dhcpv6-client ip6 saddr fe80::/64 oifname $home_ipv6_if accept + udp sport bootps udp dport bootpc ip saddr $private_ip accept + tcp dport ssh ip daddr $host1_ip accept + } + + chain POSTROUTING_SRCNAT { + type nat hook postrouting priority srcnat; + + meta nfproto ipv4 ip saddr $masq_ip oifname $masq_if masquerade + } +} +EOF -- cgit v1.2.3