Berwn
158252323f
Reusable cnx.router.* module for the Topton 1U boxes replacing OPNsense: PPPoE WAN (optionally VLAN-tagged, AIS: 10, secret credentials incl. username), VLAN-filtering bridge, nftables NAT/firewall with MSS clamp, Kea DHCP with per-VLAN lease time, Blocky DNS, DHCPv6-PD, CrowdSec with the ZeroTier mesh whitelisted, optional Omada controller, ZFS disk. Fleet baseline rides along: admins sops group is now derived for every machine in clan.nix (secrets encrypt to it from the first vars generate) and time sync is chrony everywhere instead of systemd-timesyncd.
65 lines
1.9 KiB
Nix
65 lines
1.9 KiB
Nix
# PPPoE WAN session. ISP credentials are entered once at `clan vars generate`
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# (prompts). Both are secret — AIS often uses the same string for username and
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# password — so neither may land in the Nix store: pppd reads the username from
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# an included secret options file and the password from chap/pap-secrets.
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{
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config,
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lib,
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...
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}:
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let
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cfg = config.cnx.router;
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creds = config.clan.core.vars.generators.pppoe-credentials;
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in
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{
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config = lib.mkIf cfg.enable {
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clan.core.vars.generators.pppoe-credentials = {
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prompts.username = {
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description = "PPPoE username (from the ISP)";
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type = "hidden";
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};
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prompts.password = {
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description = "PPPoE password (from the ISP)";
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type = "hidden";
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};
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files."user-opts".secret = true;
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files."chap-secrets".secret = true;
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script = ''
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user="$(cat "$prompts"/username)"
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pass="$(cat "$prompts"/password)"
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printf 'user "%s"\n' "$user" > "$out"/user-opts
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printf '"%s" * "%s"\n' "$user" "$pass" > "$out"/chap-secrets
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'';
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};
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services.pppd = {
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enable = true;
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peers.wan = {
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autostart = true;
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config = ''
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plugin pppoe.so ${cfg.wan.pppInterface}
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ifname ppp0
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file ${creds.files."user-opts".path}
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noipdefault
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defaultroute
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noauth
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hide-password
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persist
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maxfail 0
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holdoff 5
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lcp-echo-interval 15
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lcp-echo-failure 3
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+ipv6
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mtu 1492
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mru 1492
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'';
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};
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};
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# pppd looks up the password for `user` in these files at dial time; both
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# point at the same generated `"<user>" * "<pass>"` line (PAP and CHAP).
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environment.etc."ppp/chap-secrets".source = creds.files."chap-secrets".path;
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environment.etc."ppp/pap-secrets".source = creds.files."chap-secrets".path;
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};
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}
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