try iptables instead of nftables

This commit is contained in:
2023-12-01 17:46:47 +01:00
parent db26c82ebd
commit 579b768230

View File

@@ -1,115 +1,147 @@
{ ... }: {
networking = {
nat.enable = false;
firewall.enable = false;
nftables = {
firewall = {
enable = true;
ruleset = ''
table inet filter {
# enable flow offloading for better throughput
# flowtable f {
# hook ingress priority 0;
# devices = { lan, server, wg_cloonar, smart, multimedia, guest };
# }
extraCommands = ''
iptables -A INPUT -i lo -j ACCEPT
iptables -A INPUT -i wan -j ACCEPT
iptables -A INPUT -i lan -j ACCEPT
iptables -A INPUT -i wg_cloonar -j ACCEPT
iptables -A INPUT -p udp -i smart --dports 53,67,68 -j ACCEPT
iptables -A INPUT -p udp -i multimedia --dports 53,67,68 -j ACCEPT
iptables -A INPUT -p tcp -i smart --dports 80,443,453 -j ACCEPT
iptables -A INPUT -p tcp -i multimedia --dports 80,443,453 -j ACCEPT
chain output {
type filter hook output priority 100; policy accept;
}
iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
chain input {
type filter hook input priority filter; policy drop;
iptables -A FORWARD -i wan -d 10.42.0.0/24 -j ACCEPT
iptables -A FORWARD -i lan -d 10.42.0.0/24 -j ACCEPT
iptables -A FORWARD -i wg_cloonar -d 10.42.0.0/24 -j ACCEPT
# accept any localhost traffic
iifname lo accept
iptables -A FORWARD -i lan -o wan -j ACCEPT
iptables -A FORWARD -i server -o wan -j ACCEPT
iptables -A FORWARD -i multimedia -o wan -j ACCEPT
iptables -A FORWARD -i smart -o wan -j ACCEPT
iptables -A FORWARD -i wg_cloonar -o wan -j ACCEPT
# Allow trusted networks to access the router
iifname {
"wan", # disable when final
"lan",
"wg_cloonar"
} counter accept
iptables -A FORWARD -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
# Allow networks to access the dns and dhcp
iifname {
"lan",
"server",
"wg_cloonar",
"smart",
"multimedia"
} udp dport { 53, 67, 68 } counter accept
iifname {
"lan",
"server",
"wg_cloonar",
"smart",
"multimedia"
} tcp dport { 80, 443, 853 } counter accept
# Accept mDNS for avahi reflection
# iifname "multimedia" ip saddr <chromecast IP> tcp dport { llmnr } counter accept
# iifname "multimedia" ip saddr <chromecast IP> udp dport { mdns, llmnr } counter accept
# Allow returning traffic from wg_cloonar and drop everthing else
iifname "wg_cloonar" ct state { established, related } counter accept
iifname "wg_cloonar" drop
iifname "wan" ct state { established, related } accept comment "Allow established traffic"
iifname "wan" icmp type { echo-request, destination-unreachable, time-exceeded } counter accept comment "Allow select ICMP"
iifname "wan" counter drop comment "Drop all other unsolicited traffic from wan"
}
chain forward {
type filter hook forward priority filter; policy drop;
# enable flow offloading for better throughput
# ip protocol { tcp, udp } flow offload @f
# multimedia airplay
iifname "multimedia" oifname { "lan" } counter accept
# lan and vpn to any
# TODO: disable wan when finished
iifname { "wan", "lan", "wg_cloonar" } oifname { "lan", "server", "podman0", "multimedia", "smart", "wrwks", "wg_cloonar", "wg_epicenter", "wg_ghetto_at" } counter accept
# Allow trusted network WAN access
iifname {
"lan",
"server",
"podman0",
"multimedia",
"smart",
"wg_cloonar",
} oifname {
"wan",
} counter accept comment "Allow trusted LAN to WAN"
# Allow established WAN to return
iifname {
"wan",
} oifname {
"lan",
"server",
"podman0",
"multimedia",
"smart",
"wg_cloonar",
} ct state { established, related } counter accept comment "Allow established back to LANs"
}
}
table ip nat {
chain prerouting {
type nat hook prerouting priority filter; policy accept;
}
# Setup NAT masquerading on the ppp0 interface
chain postrouting {
type nat hook postrouting priority filter; policy accept;
# oifname { "wan", "wrwks", "wg_epicenter", "wg_ghetto_at" } masquerade
oifname { "wan" } masquerade
}
}
iptables -t nat -A POSTROUTING -o wan -j MASQUERADE
iptables -t nat -A POSTROUTING -o wrwks -j MASQUERADE
iptables -t nat -A POSTROUTING -o wg_epicenter -j MASQUERADE
iptables -t nat -A POSTROUTING -o wg_ghetto_at -j MASQUERADE
'';
};
# nftables = {
# enable = true;
# ruleset = ''
# table inet filter {
# # enable flow offloading for better throughput
# # flowtable f {
# # hook ingress priority 0;
# # devices = { lan, server, wg_cloonar, smart, multimedia, guest };
# # }
#
# chain output {
# type filter hook output priority 100; policy accept;
# }
#
# chain input {
# type filter hook input priority filter; policy drop;
#
# # accept any localhost traffic
# iifname lo accept
#
# # Allow trusted networks to access the router
# iifname {
# "wan", # disable when final
# "lan",
# "wg_cloonar"
# } counter accept
#
# # Allow networks to access the dns and dhcp
# iifname {
# "lan",
# "server",
# "wg_cloonar",
# "smart",
# "multimedia"
# } udp dport { 53, 67, 68 } counter accept
# iifname {
# "lan",
# "server",
# "wg_cloonar",
# "smart",
# "multimedia"
# } tcp dport { 80, 443, 853 } counter accept
#
# # Accept mDNS for avahi reflection
# # iifname "multimedia" ip saddr <chromecast IP> tcp dport { llmnr } counter accept
# # iifname "multimedia" ip saddr <chromecast IP> udp dport { mdns, llmnr } counter accept
#
# # Allow returning traffic from wg_cloonar and drop everthing else
# iifname "wg_cloonar" ct state { established, related } counter accept
# iifname "wg_cloonar" drop
#
# iifname "wan" ct state { established, related } accept comment "Allow established traffic"
# iifname "wan" icmp type { echo-request, destination-unreachable, time-exceeded } counter accept comment "Allow select ICMP"
# iifname "wan" counter drop comment "Drop all other unsolicited traffic from wan"
# }
#
# chain forward {
# type filter hook forward priority filter; policy drop;
#
# # enable flow offloading for better throughput
# # ip protocol { tcp, udp } flow offload @f
#
# # multimedia airplay
# iifname "multimedia" oifname { "lan" } counter accept
#
# # lan and vpn to any
# # TODO: disable wan when finished
# iifname { "wan", "lan", "wg_cloonar" } oifname { "lan", "server", "podman0", "multimedia", "smart", "wrwks", "wg_cloonar", "wg_epicenter", "wg_ghetto_at" } counter accept
#
# # Allow trusted network WAN access
# iifname {
# "lan",
# "server",
# "podman0",
# "multimedia",
# "smart",
# "wg_cloonar",
# } oifname {
# "wan",
# } counter accept comment "Allow trusted LAN to WAN"
#
# # Allow established WAN to return
# iifname {
# "wan",
# } oifname {
# "lan",
# "server",
# "podman0",
# "multimedia",
# "smart",
# "wg_cloonar",
# } ct state { established, related } counter accept comment "Allow established back to LANs"
# }
# }
#
# table ip nat {
# chain prerouting {
# type nat hook prerouting priority filter; policy accept;
# }
#
# # Setup NAT masquerading on the ppp0 interface
# chain postrouting {
# type nat hook postrouting priority filter; policy accept;
# # oifname { "wan", "wrwks", "wg_epicenter", "wg_ghetto_at" } masquerade
# oifname { "wan" } masquerade
# }
# }
# '';
# };
};
}