mirror of
https://github.com/mdlayher/homelab.git
synced 2024-12-14 11:47:32 +00:00
nixos/routnerr-2: initial multi-WAN firewall configuration
Signed-off-by: Matt Layher <mdlayher@gmail.com>
This commit is contained in:
Matt Layher
parent
63dde90aa3
commit
0bd9c7077e
3 changed files with 69 additions and 17 deletions
|
|
@ -137,12 +137,15 @@ func main() {
|
|||
out.addInterface("tengb0", tengb0)
|
||||
out.addInterface("wg0", wg0)
|
||||
|
||||
// TODO: wan0 is a special case but should probably live in its own
|
||||
// section as it has different rules.
|
||||
// TODO: WANs are special cases and should probably live in their own
|
||||
// section with different rules.
|
||||
out.Interfaces["wan0"] = iface{
|
||||
Name: "enp1s0",
|
||||
IPv4: wanIPv4(),
|
||||
}
|
||||
out.Interfaces["wwan0"] = iface{
|
||||
Name: "wwp0s19u1u3i12",
|
||||
}
|
||||
|
||||
// Marshal human-readable JSON for nicer git diffs.
|
||||
e := json.NewEncoder(os.Stdout)
|
||||
|
|
|
|||
|
|
@ -198,6 +198,16 @@
|
|||
"ula": "fd9e:1a04:f01d:20::1",
|
||||
"lla": "fe80::1"
|
||||
}
|
||||
},
|
||||
"wwan0": {
|
||||
"name": "wwp0s19u1u3i12",
|
||||
"internal_domain": false,
|
||||
"ipv4": "",
|
||||
"ipv6": {
|
||||
"gua": "",
|
||||
"ula": "",
|
||||
"lla": ""
|
||||
}
|
||||
}
|
||||
},
|
||||
"wireguard": {
|
||||
|
|
|
|||
|
|
@ -28,8 +28,10 @@ let
|
|||
# Produces a CSV list of interface names.
|
||||
mkCSV = lib.concatMapStrings (ifi: "${ifi.name}, ");
|
||||
|
||||
# WAN interface.
|
||||
wan0 = vars.interfaces.wan0.name;
|
||||
# WAN interfaces.
|
||||
metered_wans = with vars.interfaces; [ wwan0 ];
|
||||
unmetered_wans = with vars.interfaces; [ wan0 ];
|
||||
all_wans = with vars.interfaces; [ wan0 wwan0 ];
|
||||
|
||||
# LAN interfaces, segmented into trusted, limited, and untrusted groups.
|
||||
trusted_lans = with vars.interfaces; [ enp2s0 lan0 lab0 tengb0 wg0 ];
|
||||
|
|
@ -79,8 +81,10 @@ in {
|
|||
# ICMPv4/6.
|
||||
${icmp_rules}
|
||||
|
||||
# Allow WAN to selectively communicate with the router.
|
||||
iifname ${wan0} jump input_wan
|
||||
# Allow all WANs to selectively communicate with the router.
|
||||
iifname {
|
||||
${mkCSV all_wans}
|
||||
} jump input_wan
|
||||
|
||||
# Always allow router solicitation from any LAN.
|
||||
ip6 nexthdr icmpv6 icmpv6 type nd-router-solicit counter accept
|
||||
|
|
@ -183,7 +187,16 @@ in {
|
|||
# Trusted source LANs.
|
||||
iifname {
|
||||
${mkCSV trusted_lans}
|
||||
} oifname ${wan0} counter accept comment "Allow trusted LANs to WAN";
|
||||
} oifname {
|
||||
${mkCSV unmetered_wans}
|
||||
} counter accept comment "Allow trusted LANs to unmetered WANs";
|
||||
|
||||
# Forward certain trusted LAN traffic to metered WANs.
|
||||
iifname {
|
||||
${mkCSV trusted_lans}
|
||||
} oifname {
|
||||
${mkCSV metered_wans}
|
||||
} jump forward_trusted_lan_metered_wan
|
||||
|
||||
iifname {
|
||||
${mkCSV trusted_lans}
|
||||
|
|
@ -196,20 +209,28 @@ in {
|
|||
# Limited/guest LANs to WAN.
|
||||
iifname {
|
||||
${mkCSV limited_lans}
|
||||
} oifname ${wan0} counter accept comment "Allow limited LANs to reach WAN";
|
||||
} oifname {
|
||||
${mkCSV unmetered_wans}
|
||||
} counter accept comment "Allow limited LANs to unmetered WANs";
|
||||
|
||||
# Untrusted LANs to WAN.
|
||||
iifname {
|
||||
${mkCSV untrusted_lans}
|
||||
} oifname ${wan0} jump forward_untrusted_lan_wan
|
||||
} oifname {
|
||||
${mkCSV unmetered_wans}
|
||||
} jump forward_untrusted_lan_wan
|
||||
|
||||
# WAN to trusted LANs.
|
||||
iifname ${wan0} oifname {
|
||||
# All WANs to trusted LANs.
|
||||
iifname {
|
||||
${mkCSV all_wans}
|
||||
} oifname {
|
||||
${mkCSV trusted_lans}
|
||||
} jump forward_wan_trusted_lan
|
||||
|
||||
# WAN to limited/untrusted LANs.
|
||||
iifname ${wan0} oifname {
|
||||
# Unmetered WANs only to limited/untrusted LANs.
|
||||
iifname {
|
||||
${mkCSV unmetered_wans}
|
||||
} oifname {
|
||||
${mkCSV limited_lans}
|
||||
${mkCSV untrusted_lans}
|
||||
} jump forward_wan_limited_untrusted_lan
|
||||
|
|
@ -217,6 +238,15 @@ in {
|
|||
counter reject
|
||||
}
|
||||
|
||||
chain forward_trusted_lan_metered_wan {
|
||||
# Allow only specific devices to reach metered WANs.
|
||||
ip saddr {
|
||||
${vars.server_ipv4},
|
||||
} counter accept comment "trusted LAN devices to metered WANs"
|
||||
|
||||
counter reject
|
||||
}
|
||||
|
||||
chain forward_untrusted_lan_wan {
|
||||
# Forward only necessary internet services.
|
||||
tcp dport {
|
||||
|
|
@ -285,11 +315,14 @@ in {
|
|||
chain prerouting {
|
||||
type nat hook prerouting priority 0
|
||||
|
||||
iifname ${wan0} jump prerouting_wan0
|
||||
# NAT IPv4 to all WANs.
|
||||
iifname {
|
||||
${mkCSV all_wans}
|
||||
} jump prerouting_wans
|
||||
accept
|
||||
}
|
||||
|
||||
chain prerouting_wan0 {
|
||||
chain prerouting_wans {
|
||||
tcp dport {
|
||||
${ports.plex},
|
||||
${ports.unifi_device},
|
||||
|
|
@ -309,7 +342,10 @@ in {
|
|||
|
||||
chain postrouting {
|
||||
type nat hook postrouting priority 0
|
||||
oifname ${wan0} masquerade
|
||||
# Masquerade IPv4 to all WANs.
|
||||
oifname {
|
||||
${mkCSV all_wans}
|
||||
} masquerade
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -317,7 +353,10 @@ in {
|
|||
chain prerouting {
|
||||
type nat hook prerouting priority 0
|
||||
|
||||
iifname ${wan0} udp dport {
|
||||
# NAT WireGuard alternate port IPv6 from all WANs.
|
||||
iifname {
|
||||
${mkCSV all_wans}
|
||||
} udp dport {
|
||||
${ports.dns},
|
||||
} redirect to ${ports.wireguard} comment "router IPv6 WireGuard DNAT"
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue