feat(access): optional slaac on int

systems/ct/nixos.nix

@@ -8,4 +8,25 @@
   services.avahi.hostName = "";
 
   system.stateVersion = "23.11";
+  environment.etc."systemd/network/eth9.network.d/int.conf".text = ''
+    [Match]
+    Name=eth9
+    Type=ether
+
+    [Link]
+    RequiredForOnline=false
+
+    [Network]
+    IPv6AcceptRA=true
+    IPv6SendRA=false
+    DHCP=no
+
+    [IPv6Prefix]
+    AddressAutoconfiguration=false
+    Prefix=fd0c::/64
+    Assign=true
+
+    [IPv6AcceptRA]
+    DHCPv6Client=false
+  '';
 }

systems/freeipa/int.nmconnection

@@ -11,3 +11,5 @@ method=manual
 address1=fd0c::aa/64
 may-fail=true
 method=manual
+addr-gen-mode=eui64
+token=::aa

systems/utsuho/nixos.nix

@@ -7,6 +7,7 @@ in {
     nixos.sops
     nixos.base
     nixos.reisen-ct
+    nixos.int
     nixos.ipa
     nixos.cloudflared
     nixos.nginx