138 lines
6.1 KiB
Nix
138 lines
6.1 KiB
Nix
{ pkgs, ... }: {
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networking = {
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firewall.checkReversePath = false;
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nat.enable = false;
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nftables = {
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enable = true;
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tables = {
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"cloonar-fw" = {
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family = "inet";
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content = ''
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chain output {
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type filter hook output priority 100; policy accept;
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}
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chain rpfilter {
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type filter hook prerouting priority mangle + 10; policy drop;
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meta nfproto ipv4 udp sport . udp dport { 68 . 67, 67 . 68 } accept comment "DHCPv4 client/server"
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fib saddr . mark . iif oif exists accept
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}
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chain input {
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type filter hook input priority filter; policy drop;
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iifname "lo" accept comment "trusted interfaces"
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ct state vmap { invalid : drop, established : accept, related : accept, new : jump input-allow, untracked : jump input-allow }
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tcp flags syn / fin,syn,rst,ack log prefix "refused connection: " level info
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}
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chain input-allow {
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udp dport != { 53, 5353 } ct state new limit rate over 1/second burst 10 packets drop comment "rate limit for new connections"
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iifname lo accept
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iifname "wan" udp dport 51820 counter accept comment "Wireguard traffic"
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iifname { "server", "vserver", "lan", "wg_cloonar" } counter accept comment "allow trusted to router"
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iifname { "multimedia", "smart" } udp dport { 53, 5353 } counter accept comment "DNS"
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# Accept mDNS for avahi reflection
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iifname "server" ip saddr 10.42.97.20/32 tcp dport { llmnr } counter accept
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iifname "server" ip saddr 10.42.97.20/32 udp dport { mdns, llmnr } counter accept
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# Allow all returning traffic
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ct state { established, related } counter accept
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# Allow returning traffic from wrwks and drop everthing else
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iifname "wrwks" ct state { established, related } counter accept
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iifname "wrwks" drop
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# Allow returning traffic from wg_epicenter and drop everthing else
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iifname "wg_epicenter" ct state { established, related } counter accept
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iifname "wg_epicenter" drop
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# Allow returning traffic from wg_ghetto_at and drop everthing else
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iifname "wg_ghetto_at" ct state { established, related } counter accept
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iifname "wg_ghetto_at" drop
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# Allow returning traffic from wan and drop everthing else
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iifname "wan" ct state { established, related } accept comment "Allow established traffic"
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iifname "wan" icmp type { echo-request, destination-unreachable, time-exceeded } counter accept comment "Allow select ICMP"
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iifname "wan" counter drop comment "Drop all other unsolicited traffic from wan"
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limit rate 60/minute burst 100 packets log prefix "Input - Drop: " comment "Log any unmatched traffic"
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}
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chain forward {
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type filter hook forward priority filter; policy drop;
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iifname "wg_cloonar" counter accept comment "test wireguard"
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iifname "wg_cloonar" oifname lo counter accept comment "wireguard to server"
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# enable flow offloading for better throughput
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# ip protocol { tcp, udp } flow offload @f
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# multimedia airplay
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iifname "multimedia" oifname { "lan" } counter accept
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iifname "multimedia" oifname "server" tcp dport { 1704, 1705 } counter accept
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iifname "lan" oifname "server" udp dport { 5000, 5353, 6001 - 6011 } counter accept
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# avahi
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iifname "server" ip saddr 10.42.97.20/32 oifname { "lan" } counter accept
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# smart home coap
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iifname "smart" oifname "server" ip daddr 10.42.97.20/32 udp dport { 5683 } counter accept
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# Forward to git server
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oifname "server" ip daddr 10.42.97.50 tcp dport { 22, 80, 443 } counter accept
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# lan and vpn to any
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# TODO: disable wan when finished
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iifname { "lan", "server", "vserver", "wg_cloonar" } oifname { "lan", "vb-*", "server", "vserver", "infrastructure", "multimedia", "smart", "wg_cloonar" } counter accept
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iifname { "lan", "server", "wg_cloonar" } oifname { "wrwks", "wg_epicenter", "wg_ghetto_at" } counter accept
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iifname { "infrastructure" } oifname { "server", "vserver" } counter accept
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iifname { "lan", "wan" } udp dport { 8211, 27015 } counter accept comment "palworld"
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# accept palword server
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iifname { "wan", "lan" } oifname "podman0" udp dport { 8211, 27015 } counter accept comment "palworld"
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# allow all established, related
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ct state { established, related } accept comment "Allow established traffic"
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# Allow trusted network WAN access
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iifname {
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"lan",
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"infrastructure",
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"server",
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"vserver",
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"multimedia",
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"smart",
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"wg_cloonar",
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"podman*",
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"guest",
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"vb-*",
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} oifname {
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"wan",
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} counter accept comment "Allow trusted LAN to WAN"
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limit rate 60/minute burst 100 packets log prefix "Forward - Drop: " comment "Log any unmatched traffic"
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}
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'';
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};
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"cloonar-nat" = {
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family = "ip";
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content = ''
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chain prerouting {
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type nat hook prerouting priority filter; policy accept;
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iifname "wan" tcp dport { 22, 80, 443 } dnat to 10.42.97.50
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}
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# Setup NAT masquerading on external interfaces
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chain postrouting {
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type nat hook postrouting priority filter; policy accept;
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oifname { "wan", "wg_cloonar", "wrwks", "wg_epicenter", "wg_ghetto_at" } masquerade
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ip daddr 10.42.97.50 masquerade
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}
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'';
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};
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};
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};
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};
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}
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