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nebula: Switch to group-based firewall rules

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This commit is contained in:
SebastianStork 2026-02-05 23:32:52 +01:00
parent ec0d5b839e
commit dfdabfb5b1
Signed by: SebastianStork
SSH key fingerprint: SHA256:tRrGdjYOwgHxpSc/wTOZQZEjxcb15P0tyXRsbAfd+2Q
9 changed files with 39 additions and 37 deletions
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8
hosts/desktop/keys/nebula.crt
View file

@ -1,6 +1,6 @@
-----BEGIN NEBULA CERTIFICATE V2----- -----BEGIN NEBULA CERTIFICATE V2-----
MIGmoECAB2Rlc2t0b3ChBwQFCv76ARiFBGlIaqqGBGsoffSHIBVD/hlbqt7XLMVq MIG9oFeAB2Rlc2t0b3ChBwQFCv76ARijFQwHImNsaWVudAwKc3luY3RoaW5nIoUE
DE4DhIQzJRBaXtQIwm5gRTI7c0VogiAWuCbaQyz2y1A+OrT1+mI2U2EdQ3X3HPzA aYUZ9YYEayh99IcgFUP+GVuq3tcsxWoMTgOEhDMlEFpe1AjCbmBFMjtzRWiCIBa4
SkjZQ+zAG4NANTlPvjlzVHXcvSnZpWO0HVFFLlFKkPav33SUb51KaOt+HX0Xyu3r JtpDLPbLUD46tPX6YjZTYR1Ddfcc/MBKSNlD7MAbg0BGe2eiIAFhf0s/Gn54OfAV
3EvhBuRRS6pc6x5/ZawfxWakQwb5dTuhDg== O1Pb2pvUUgg40MJS4+jTyltESru3sku3/obntXS46R8uSb17yAvSGbAtHkm6gfoM
-----END NEBULA CERTIFICATE V2----- -----END NEBULA CERTIFICATE V2-----

8
hosts/laptop/keys/nebula.crt
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@ -1,6 +1,6 @@
-----BEGIN NEBULA CERTIFICATE V2----- -----BEGIN NEBULA CERTIFICATE V2-----
MIGloD+ABmxhcHRvcKEHBAUK/voDGIUEaUsu2oYEayh99IcgFUP+GVuq3tcsxWoM MIG8oFaABmxhcHRvcKEHBAUK/voDGKMVDAciY2xpZW50DApzeW5jdGhpbmcihQRp
TgOEhDMlEFpe1AjCbmBFMjtzRWiCIDQsjID+DOXgSXkAkkIySZqpe8qDwc/RSe9/ hRn5hgRrKH30hyAVQ/4ZW6re1yzFagxOA4SEMyUQWl7UCMJuYEUyO3NFaIIgNCyM
rUqoGr07g0DDH0+/63YpveHA2JKKvl8T5/1kPm2Tp4SKLLy6i5g01dw4QSwaRGlW gP4M5eBJeQCSQjJJmql7yoPBz9FJ73+tSqgavTuDQNNN/BJUnq2BC7t8SwdZT3nE
nrPxsi9gbci2Jdw2AiOZmshHA7tJOpoL a2N9Ie2JK2TSCJbAaTv5mDQC/ObqSOsJfIX49oRtFmu1apVUcyYzAKq0W8sl3gE=
-----END NEBULA CERTIFICATE V2----- -----END NEBULA CERTIFICATE V2-----

8
hosts/vps-monitor/keys/nebula.crt
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@ -1,6 +1,6 @@
-----BEGIN NEBULA CERTIFICATE V2----- -----BEGIN NEBULA CERTIFICATE V2-----
MIGqoESAC3Zwcy1tb25pdG9yoQcEBQr++gUYhQRpWTmKhgRrKH30hyAVQ/4ZW6re MIG2oFCAC3Zwcy1tb25pdG9yoQcEBQr++gUYowoMCCJzZXJ2ZXIihQRphRn9hgRr
1yzFagxOA4SEMyUQWl7UCMJuYEUyO3NFaIIgEsH4GM7MoMHRA9Ua4racnsVImNb4 KH30hyAVQ/4ZW6re1yzFagxOA4SEMyUQWl7UCMJuYEUyO3NFaIIgEsH4GM7MoMHR
0fhIMdlx2Y8Gx3iDQJo2nQl5Atwka8UCU3FteaMSrgSxQW6HhBE7pwYMhlWdrusn A9Ua4racnsVImNb40fhIMdlx2Y8Gx3iDQHJU+DbIPKSh5Uc9/SzKsM3LtUZ+Yt7a
KUloRoe8tDpEWEO3qc+iQsgpr5Tuo27QUD77igs= 7gfQQJj3BgY0S5Ae3qa7Uo+zFTo6RtyJpefz4fJI4kS4kw2oUeB/1wo=
-----END NEBULA CERTIFICATE V2----- -----END NEBULA CERTIFICATE V2-----

9
hosts/vps-private/keys/nebula.crt
View file

@ -1,6 +1,7 @@
-----BEGIN NEBULA CERTIFICATE V2----- -----BEGIN NEBULA CERTIFICATE V2-----
MIGqoESAC3Zwcy1wcml2YXRloQcEBQr++gIYhQRpSG/KhgRrKH30hyAVQ/4ZW6re MIHBoFuAC3Zwcy1wcml2YXRloQcEBQr++gIYoxUMByJzZXJ2ZXIMCnN5bmN0aGlu
1yzFagxOA4SEMyUQWl7UCMJuYEUyO3NFaIIgxxdwQe3CJkEjhN6lB0dWCNqjNug5 ZyKFBGmFGgKGBGsoffSHIBVD/hlbqt7XLMVqDE4DhIQzJRBaXtQIwm5gRTI7c0Vo
oIN9KQTTTCp0dguDQHynn1xdarsZsfvF6ZJB01HrOVgLs2kVod3ZZZD3L8Fe/hfF giDHF3BB7cImQSOE3qUHR1YI2qM26Dmgg30pBNNMKnR2C4NAs88H9BxfXXBirWag
TryU5SxJ8MH6irDdtgTs+9pU+BaNWms1X4zfkAQ= bF3+NXvxSKYrR1xR9Z4yBzl7JHXBRbkG4GJ29k4bL3dXrng1+yRnhZox3txUu2uR
+46ABA==
-----END NEBULA CERTIFICATE V2----- -----END NEBULA CERTIFICATE V2-----

8
hosts/vps-public/keys/nebula.crt
View file

@ -1,6 +1,6 @@
-----BEGIN NEBULA CERTIFICATE V2----- -----BEGIN NEBULA CERTIFICATE V2-----
MIGpoEOACnZwcy1wdWJsaWOhBwQFCv76BBiFBGlZOWqGBGsoffSHIBVD/hlbqt7X MIG1oE+ACnZwcy1wdWJsaWOhBwQFCv76BBijCgwIInNlcnZlciKFBGmFGgaGBGso
LMVqDE4DhIQzJRBaXtQIwm5gRTI7c0VogiB2ciqx2b7d1mUPRnrtM5sN+X4Pohtb ffSHIBVD/hlbqt7XLMVqDE4DhIQzJRBaXtQIwm5gRTI7c0VogiB2ciqx2b7d1mUP
kBNPPFUDxwX7SoNAWUNPjR8iSib9C52wEmTzolYIvwbAUnOjMytH01xHUgPhiiTv RnrtM5sN+X4PohtbkBNPPFUDxwX7SoNAIM5yXTNoekP81KhalEV4A50WmAFINP0a
Cm4CTtS9vWllCCH682evxo+0I3+PKDRp8DKxCQ== EP5Xz4ajYTHuFy/ZOnaKLCCyyRW77mJunUkWdFas6W0GFJwTkbchDA==
-----END NEBULA CERTIFICATE V2----- -----END NEBULA CERTIFICATE V2-----

6
modules/system/services/nebula/default.nix
View file

@ -15,6 +15,12 @@ in
enable = lib.mkEnableOption "" // { enable = lib.mkEnableOption "" // {
default = netCfg.overlay.implementation == "nebula"; default = netCfg.overlay.implementation == "nebula";
}; };
groups = lib.mkOption {
type = lib.types.nonEmptyListOf lib.types.nonEmptyStr;
default =
lib.singleton netCfg.overlay.role
++ lib.optional config.custom.services.syncthing.enable "syncthing";
};
publicKeyPath = lib.mkOption { publicKeyPath = lib.mkOption {
type = lib.types.path; type = lib.types.path;

13
modules/system/services/sshd.nix
View file

@ -28,14 +28,11 @@ in
}; };
}; };
nebula.networks.mesh.firewall.inbound = nebula.networks.mesh.firewall.inbound = lib.singleton {
netCfg.peers port = 22;
|> lib.filter (node: node.overlay.role == "client") proto = "tcp";
|> lib.map (client: { group = "client";
port = 22; };
proto = "tcp";
host = client.hostName;
});
}; };
systemd.services.sshd = { systemd.services.sshd = {

13
modules/system/services/syncthing.nix
View file

@ -118,14 +118,11 @@ in
}; };
}; };
nebula.networks.mesh.firewall.inbound = nebula.networks.mesh.firewall.inbound = lib.singleton {
config.services.syncthing.settings.devices port = cfg.syncPort;
|> lib.attrNames proto = "tcp";
|> lib.map (name: { group = "syncthing";
port = cfg.syncPort; };
proto = "tcp";
host = name;
});
}; };
custom = { custom = {

3
scripts/nebula-regen-host-cert.nix
View file

@ -15,6 +15,7 @@ pkgs.writeShellApplication {
host="$1" host="$1"
address="$(nix eval --raw ".#nixosConfigurations.$host.config.custom.networking.overlay.cidr")" address="$(nix eval --raw ".#nixosConfigurations.$host.config.custom.networking.overlay.cidr")"
groups="$(nix eval ".#nixosConfigurations.$host.config.custom.services.nebula.groups" --apply 'builtins.concatStringsSep ","')"
ca_cert='modules/system/services/nebula/ca.crt' ca_cert='modules/system/services/nebula/ca.crt'
host_pub="$(nix eval --raw ".#nixosConfigurations.$host.config.custom.services.nebula.publicKeyPath")" host_pub="$(nix eval --raw ".#nixosConfigurations.$host.config.custom.services.nebula.publicKeyPath")"
host_cert="$(nix eval --raw ".#nixosConfigurations.$host.config.custom.services.nebula.certificatePath")" host_cert="$(nix eval --raw ".#nixosConfigurations.$host.config.custom.services.nebula.certificatePath")"
@ -35,6 +36,6 @@ pkgs.writeShellApplication {
fi fi
rm -f "$host_cert" rm -f "$host_cert"
nebula-cert sign -name "$host" -networks "$address" -ca-crt "$ca_cert" -ca-key "$ca_key" -in-pub "$host_pub" -out-crt "$host_cert" nebula-cert sign -name "$host" -networks "$address" -groups "$groups" -ca-crt "$ca_cert" -ca-key "$ca_key" -in-pub "$host_pub" -out-crt "$host_cert"
''; '';
} }