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Add IPv6 prefix delegation and PPPoE uplink

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IPv6: router.wan.ipv6.enable mirrors the existing uplink config (DHCPv6 with
WithoutRA=solicit, delegated prefix). The ISP delegates a single /64, so
exactly one LAN may claim it via router.lans.<name>.ipv6.pd (asserted); other
LANs stay IPv4-only. SLAAC only, no NAT66.

PPPoE: router.wan.ipv4.type = "pppoe" runs pppd on an optional VLAN of the
uplink, with the password read from a file at service start (never the Nix
store). NAT, forwarding and MSS clamping (MTU 1492) use the derived PPP
device; native IPv6 stays on the untagged link.

Tests: basic.nix is parameterised by uplink type; the pppoe variant uses a
fake ISP with pppoe-server (VLAN 7, CHAP). Both variants cover IPv6 PD, SLAAC,
routing without NAT and WAN-deny. Assertion tests gain PD/PPPoE cases and a
full-system evaluation step.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
nils
2026-10-27 16:29:52 +01:00
co-authored by Claude Sonnet 5.5
parent 96e5b7b859
commit 6038367252
13 changed files with 671 additions and 72 deletions
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modules/router/dns.nix
+4 -2
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@@ -14,9 +14,11 @@ in
ip-freebind = true;
access-control = [
"127.0.0.0/8 allow"
] ++ map (l: "${l.ipv4.subnet} allow") lans;
]
++ map (l: "${l.ipv4.subnet} allow") lans;
};
} // lib.optionalAttrs (cfg.dns.forwarders != [ ]) {
}
// lib.optionalAttrs (cfg.dns.forwarders != [ ]) {
forward-zone = [
{
name = ".";