feat(pxe-boot): enroll in FreeIPA domain

- Add IPA client module with pre-provisioned keytab
- Set networking.domain for correct Kerberos FQDN
- Encrypted keytab covers lxc-pxe-boot and proxmox-pxe-boot age keys

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.sops.yaml

@@ -63,6 +63,16 @@ creation_rules:
           - *lxc-nix-cache
           - *proxmox-nix-cache
 
+  # Host keytab for nix-cache FreeIPA enrollment (binary sops file).
+  # Generate with: sops -e --input-type binary /tmp/nix-cache.keytab > secrets/nix-cache.keytab
+  - path_regex: secrets/nix-cache\.keytab$
+    key_groups:
+      - age:
+          - *admin
+          - *linode-nix-cache
+          - *lxc-nix-cache
+          - *proxmox-nix-cache
+
   - path_regex: secrets/server\.yaml$
     key_groups:
       - age:
@@ -117,6 +127,16 @@ creation_rules:
   # scripts/secrets/sync-host-keys.sh yet, so whichever variant is actually
   # deployed next needs its recipient added here (and `sops updatekeys` rerun)
   # before it can decrypt this.
+  # Host keytab for tailscale-router FreeIPA enrollment (binary sops file).
+  # Generated by scripts/ipa/create-nixos-ipa-host-account.sh.
+  - path_regex: secrets/tailscale-router\.keytab$
+    key_groups:
+      - age:
+          - *admin
+          - *lxc-tailscale-router
+          - *proxmox-tailscale-router
+          - *linode-tailscale-router
+
   - path_regex: secrets/gui\.yaml$
     key_groups:
       - age:
@@ -125,3 +145,12 @@ creation_rules:
           - *baremetal-gui
           - *linode-gui
           - *proxmox-gui
+
+  # Host keytab for pxe-boot FreeIPA enrollment (binary sops file).
+  # Generated by scripts/ipa/create-nixos-ipa-host-account.sh.
+  - path_regex: secrets/pxe-boot\.keytab$
+    key_groups:
+      - age:
+          - *admin
+          - *lxc-pxe-boot
+          - *proxmox-pxe-boot

certs/ipa-ca.crt

@@ -0,0 +1,25 @@
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----

hosts/nix-cache/host.nix

@@ -6,10 +6,15 @@
       name = "nix-cache";
       sopsFile = ../../secrets/nix-cache.yaml;
     })
+    (import ../../modules/ipa/client.nix {
+      keytabSopsFile = ../../secrets/nix-cache.keytab;
+      caCertFile = ../../certs/ipa-ca.crt;
+    })
   ];
 
   networking = {
     hostName = vars.nixCacheHost;
+    domain = vars.homeDomain;
     useDHCP = false;
     interfaces.${vars.lxcLanInterface}.ipv4.addresses = [{
       address = vars.nixCacheIp;

hosts/pxe-boot/host.nix

@@ -1,8 +1,16 @@
 { vars, ... }:
 
 {
+  imports = [
+    (import ../../modules/ipa/client.nix {
+      keytabSopsFile = ../../secrets/pxe-boot.keytab;
+      caCertFile     = ../../certs/ipa-ca.crt;
+    })
+  ];
+
   networking = {
     hostName = "pxe-boot";
+    domain   = vars.homeDomain;
     useDHCP = false;
     interfaces.${vars.lxcLanInterface}.ipv4.addresses = [{
       address = vars.pxeServerIp;

hosts/tailscale-router/host.nix

@@ -6,10 +6,15 @@
       name = "tailscale-router";
       sopsFile = ../../secrets/tailscale-router.yaml;
     })
+    (import ../../modules/ipa/client.nix {
+      keytabSopsFile = ../../secrets/tailscale-router.keytab;
+      caCertFile = ../../certs/ipa-ca.crt;
+    })
   ];
 
   networking = {
     hostName = "tailscale-router";
+    domain = vars.homeDomain;
     useDHCP = false;
     interfaces.${vars.lxcLanInterface}.ipv4.addresses = [{
       address = vars.tailscaleRouterIp;

modules/ipa/client.nix

@@ -0,0 +1,103 @@
+# Fully declarative FreeIPA domain membership.
+#
+# Configures security.ipa (SSSD, Kerberos, PAM, NSSwitch) and places a
+# pre-provisioned host keytab via sops-nix so no imperative ipa-client-install
+# step is needed after deployment.
+#
+# Usage (in a host.nix imports list):
+#   (import ../../modules/ipa/client.nix {
+#     keytabSopsFile = ../../secrets/<hostname>.keytab;
+#     caCertFile     = ../../certs/ipa-ca.crt;  # already committed — do not re-fetch
+#   })
+#
+# The host.nix networking block must also set:
+#   networking.domain   = vars.homeDomain;         # needed for Kerberos FQDN
+#   networking.nameservers = [ vars.domainControllerIp ];  # IPA DNS
+#
+# One-time operator setup per host (do this BEFORE deploying):
+#
+#   0. Generate SSH host keys and the host's age key for sops:
+#        scripts/secrets/sync-host-keys.sh <flake-target>
+#      This must run before step 1 so the host age key is in .sops.yaml
+#      and the keytab can be encrypted for the host to read at boot.
+#
+#   1. Add the IPA host account and produce the sops-encrypted keytab:
+#        scripts/ipa/create-nixos-ipa-host-account.sh [--ip <addr>] <hostname>
+#      The script handles ipa host-add, ipa-getkeytab, .sops.yaml patching,
+#      and sops encryption in one step. See the script header for details.
+#
+#   2. Wire up the host (see "Usage" above), then deploy:
+#        nixos-rebuild switch  (or create-proxmox-resource.sh)
+#      No further manual enrollment steps are required after deployment.
+#
+# Manual fallback (if the script isn't usable):
+#   a. On the FreeIPA server: ipa host-add <fqdn> [--ip-address=<ip>] --force
+#   b. On the FreeIPA server: ipa-getkeytab -s <ipa-server> -p host/<fqdn> -k /tmp/<host>.keytab
+#   c. From the repo root (path must match for sops creation rule to apply):
+#        cp /tmp/<host>.keytab secrets/<host>.keytab
+#        sops -e --input-type binary -i secrets/<host>.keytab
+#   d. Commit secrets/<host>.keytab and the updated .sops.yaml, then deploy.
+#
+# vars dependencies: homeDomain, ipaServer, domainControllerIp
+
+{ keytabSopsFile, caCertFile }:
+{ config, lib, pkgs, vars, ... }:
+
+let
+  realm = lib.strings.toUpper vars.homeDomain;
+  fqdn = "${config.networking.hostName}.${vars.homeDomain}";
+  # "sweet.home" -> "dc=sweet,dc=home"
+  basedn = lib.strings.concatMapStringsSep "," (c: "dc=${c}") (lib.strings.splitString "." vars.homeDomain);
+  # security.ipa.certificate expects a derivation (package), not a raw path.
+  caCertPkg = pkgs.writeText "ipa-ca.crt" (builtins.readFile caCertFile);
+in
+{
+  security.ipa = {
+    enable = true;
+    domain = vars.homeDomain;
+    realm = realm;
+    server = vars.ipaServer;
+    certificate = caCertPkg;
+    basedn = basedn;
+    ipaHostname = fqdn;
+    offlinePasswords = true;
+    cacheCredentials = true;
+  };
+
+  # Fetch SSH public keys from IPA so users can log in with the key stored
+  # in their IPA profile rather than needing ~/.ssh/authorized_keys on every
+  # host. sss_ssh_authorizedkeys queries SSSD (which queries IPA LDAP).
+  #
+  # /nix/store is 1775 (group-writable by nixbld). OpenSSH 10.0+ rejects
+  # AuthorizedKeysCommand binaries whose path contains any group-writable
+  # component, silently skipping the command. Copy to /usr/local/bin (all
+  # components root-owned, 755) so the path passes sshd's safety check.
+  systemd.tmpfiles.rules = [
+    "d /usr/local 0755 root root - -"
+    "d /usr/local/bin 0755 root root - -"
+    "C+ /usr/local/bin/sss_ssh_authorizedkeys 0555 root root - ${pkgs.sssd}/bin/sss_ssh_authorizedkeys"
+  ];
+
+  services.openssh.extraConfig = ''
+    AuthorizedKeysCommand /usr/local/bin/sss_ssh_authorizedkeys %u
+    AuthorizedKeysCommandUser nobody
+  '';
+
+  # Create the home directory on first login if it doesn't exist yet.
+  # IPA users have no pre-created home on the host; without this sshd
+  # opens a session to a non-existent directory and resets the connection.
+  security.pam.services.sshd.makeHomeDir = true;
+
+  # Host keytab: pre-provisioned on the IPA server, sops-encrypted binary.
+  # Placed at /etc/krb5.keytab before SSSD starts so the host authenticates
+  # to IPA without running ipa-client-install.
+  sops.secrets."ipa-host-keytab" = {
+    sopsFile = keytabSopsFile;
+    format = "binary";
+    path = "/etc/krb5.keytab";
+    owner = "root";
+    group = "root";
+    mode = "0600";
+    restartUnits = [ "sssd.service" ];
+  };
+}

scripts/env.sh

@@ -88,6 +88,17 @@ export NIX_CACHE_HOST
 : "${LAN_DOMAIN:=gitea.lan.ddnsgeek.com}"
 export LAN_DOMAIN
 
+# Matches variables.nix's homeDomain -- the base LAN domain for service
+# subdomains, FreeIPA Kerberos realm, and host FQDNs.
+: "${HOME_DOMAIN:=sweet.home}"
+export HOME_DOMAIN
+
+# Matches variables.nix's ipaServer -- the FreeIPA server hostname.
+# scripts/ipa/create-nixos-ipa-host-account.sh SSHes here to run
+# ipa host-add and ipa-getkeytab.
+: "${IPA_SERVER:=domain-controller.sweet.home}"
+export IPA_SERVER
+
 # nix_extra_opts: call as a plain statement (NOT inside $(...)/<(...) --
 # that forks a subshell, and the whole point is exporting a decision back
 # into *this* shell) to populate the global NIX_OPTS array with whatever

scripts/ipa/create-nixos-ipa-host-account.sh

@@ -0,0 +1,295 @@
+#!/usr/bin/env bash
+# Add a NixOS host to the FreeIPA domain and produce a sops-encrypted keytab
+# at secrets/<hostname>.keytab, ready for modules/ipa/client.nix.
+#
+# One command replaces three error-prone manual steps:
+#   1. ipa host-add on the domain controller
+#   2. ipa-getkeytab on the domain controller + SCP back
+#   3. sops encrypt in-place (must be at secrets/<hostname>.keytab for
+#      the creation rule to match -- the common mistake that breaks sops)
+#
+# Usage:
+#   scripts/ipa/create-nixos-ipa-host-account.sh [options] <hostname>
+#
+# Arguments:
+#   <hostname>       Short hostname, e.g. "tailscale-router". The FQDN is
+#                    derived as <hostname>.<HOME_DOMAIN>.
+#
+# Options:
+#   --ip <addr>      Register this IP with the IPA host record (optional).
+#   --dc <host>      SSH to this host to run IPA commands.
+#                    Default: $IPA_SERVER (from env.sh / environment).
+#   --dc-user <u>    SSH user on the domain controller. Default: wayne.
+#   --dry-run        Print what would be done without making any changes.
+#   -h, --help       Show this message.
+#
+# Prereqs:
+#   1. Run from the repo root (so .sops.yaml and secrets/ are found).
+#   2. SSH access to the domain controller as --dc-user (default: wayne)
+#      with passwordless sudo (or sudo cached). IPA commands and kinit run
+#      as root via sudo so the Kerberos ticket is in root's cache where all
+#      ipa tools expect it. If there's no valid ticket, the script runs
+#      `sudo kinit admin` interactively — you'll be prompted for the IPA
+#      admin password once. The password never touches this script.
+#   3. The host's age key(s) must already be in .sops.yaml. Run
+#      scripts/secrets/sync-host-keys.sh <flake-target> first so the host
+#      can decrypt its own keytab on boot. This script adds the .sops.yaml
+#      creation rule for secrets/<hostname>.keytab automatically, but the
+#      host age key anchor (&lxc-<hostname> etc.) must already exist —
+#      otherwise only the admin key can decrypt the keytab and the deployed
+#      host will fail to read it.
+#   4. sops in PATH, or Nix available to run it via `nix run`.
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+
+# shellcheck source=../env.sh
+source "${SCRIPT_DIR}/../env.sh"
+
+# --- Argument parsing ---
+
+DC_HOST="${IPA_SERVER}"
+DC_USER="wayne"
+IP_ADDR=""
+DRY_RUN=false
+TARGET=""
+
+usage() {
+  sed -n '/^# Usage:/,/^[^#]/{ /^#/{ s/^# \?//; p } }' "$0"
+  exit "${1:-0}"
+}
+
+while [[ $# -gt 0 ]]; do
+  case "$1" in
+    --ip)      IP_ADDR="$2";  shift 2 ;;
+    --dc)      DC_HOST="$2";  shift 2 ;;
+    --dc-user) DC_USER="$2";  shift 2 ;;
+    --dry-run) DRY_RUN=true;  shift ;;
+    -h|--help) usage 0 ;;
+    -*)  echo "Unknown flag: $1" >&2; usage 1 ;;
+    *)
+      if [[ -n "${TARGET}" ]]; then echo "Unexpected argument: $1" >&2; usage 1; fi
+      TARGET="$1"; shift
+      ;;
+  esac
+done
+
+if [[ -z "${TARGET}" ]]; then
+  echo "Error: hostname required." >&2
+  usage 1
+fi
+
+FQDN="${TARGET}.${HOME_DOMAIN}"
+KEYTAB_SECRET="${REPO_ROOT}/secrets/${TARGET}.keytab"
+# Temp path on the domain controller — use a name that won't collide.
+DC_TMP="/tmp/nixos-keytab-${TARGET}-$$.keytab"
+
+# --- Helpers ---
+
+log()  { echo "==> $*"; }
+logn() { echo "    $*"; }
+
+run() {
+  if $DRY_RUN; then
+    echo "[dry-run] $*"
+  else
+    "$@"
+  fi
+}
+
+dc_run() {
+  # Run a command string on the domain controller via SSH.
+  if $DRY_RUN; then
+    echo "[dry-run] ssh ${DC_USER}@${DC_HOST} $*"
+  else
+    ssh "${DC_USER}@${DC_HOST}" "$@"
+  fi
+}
+
+# --- Locate sops ---
+
+if command -v sops &>/dev/null; then
+  SOPS_CMD=(sops)
+else
+  log "sops not in PATH — will use 'nix run nixpkgs#sops'"
+  SOPS_CMD=(nix run "nixpkgs#sops" --)
+fi
+
+# --- Preflight checks ---
+
+cd "${REPO_ROOT}"
+
+[[ -f .sops.yaml ]] || { echo "Error: .sops.yaml not found — run from repo root." >&2; exit 1; }
+[[ -d secrets  ]]   || { echo "Error: secrets/ not found — run from repo root."   >&2; exit 1; }
+
+# --- Step 1: Ensure .sops.yaml has a creation rule for this keytab ---
+#
+# sops matches creation rules against the PATH of the file being encrypted,
+# not the output path. To match secrets/<hostname>.keytab, the file must
+# already be at that path when sops -e -i is called. The creation rule must
+# also exist at that point or sops will refuse with "no matching creation
+# rules found."
+
+log "Checking .sops.yaml for creation rule: secrets/${TARGET}.keytab"
+
+RULE_EXISTS=false
+# Match "path_regex: secrets/<hostname>...keytab" — using .*keytab rather
+# than \.keytab because the file stores the regex verbatim (\.keytab = two
+# chars: backslash + dot), which a BRE \.  (= escaped literal dot) won't span.
+if grep -q "path_regex: secrets/${TARGET}.*keytab" .sops.yaml 2>/dev/null; then
+  RULE_EXISTS=true
+  logn "Rule already exists — skipping addition."
+fi
+
+if ! $RULE_EXISTS; then
+  # Collect which platform-variant age anchors exist in .sops.yaml for this
+  # hostname. The keytab is platform-agnostic (same FQDN regardless of
+  # whether lxc/proxmox/linode variant is deployed), so all platform anchors
+  # that have been registered get added as recipients.
+  RECIPIENTS=("*admin")
+  for platform in lxc proxmox linode; do
+    anchor="${platform}-${TARGET}"
+    if grep -q "^  - &${anchor} " .sops.yaml; then
+      RECIPIENTS+=("*${anchor}")
+    fi
+  done
+
+  if [[ ${#RECIPIENTS[@]} -eq 1 ]]; then
+    echo "Warning: no platform age keys found for '${TARGET}' in .sops.yaml." >&2
+    echo "         Run scripts/secrets/sync-host-keys.sh <flake-target> first," >&2
+    echo "         otherwise only the admin key can decrypt the keytab and the" >&2
+    echo "         deployed host won't be able to read it at boot." >&2
+    echo "         Continuing with admin-only encryption..." >&2
+  fi
+
+  # Build the indented recipient list for the YAML block.
+  RECIPIENT_YAML=""
+  for r in "${RECIPIENTS[@]}"; do
+    RECIPIENT_YAML+="          - ${r}"$'\n'
+  done
+  RECIPIENT_YAML="${RECIPIENT_YAML%$'\n'}"  # strip trailing newline
+
+  NEW_RULE="
+  # Host keytab for ${TARGET} FreeIPA enrollment (binary sops file).
+  # Generated by scripts/ipa/create-nixos-ipa-host-account.sh.
+  - path_regex: secrets/${TARGET}\\.keytab\$
+    key_groups:
+      - age:
+${RECIPIENT_YAML}"
+
+  if $DRY_RUN; then
+    echo "[dry-run] Would append to .sops.yaml:"
+    echo "${NEW_RULE}"
+  else
+    logn "Adding creation rule (recipients: ${RECIPIENTS[*]})"
+    printf '%s\n' "${NEW_RULE}" >> .sops.yaml
+    logn "Added."
+  fi
+fi
+
+# --- Step 2: Add IPA host account (idempotent) ---
+
+log "Adding FreeIPA host account: ${FQDN}"
+
+# Ensure there's a valid admin Kerberos ticket on the DC.
+# ipa host-add and ipa-getkeytab both need one. All IPA commands run via
+# sudo so the ticket must be in root's cache — check and refresh as root.
+# ssh -t allocates a PTY so kinit (and sudo if needed) can prompt normally;
+# no password ever touches this script or the shell history.
+if ! $DRY_RUN; then
+  if ! ssh "${DC_USER}@${DC_HOST}" "sudo klist -s" &>/dev/null; then
+    log "No valid Kerberos ticket on ${DC_HOST} — running sudo kinit admin"
+    ssh -t "${DC_USER}@${DC_HOST}" "sudo kinit admin"
+    if ! ssh "${DC_USER}@${DC_HOST}" "sudo klist -s" &>/dev/null; then
+      echo "Error: kinit admin failed or produced no valid ticket." >&2
+      exit 1
+    fi
+  else
+    logn "Kerberos ticket on ${DC_HOST} is valid."
+  fi
+fi
+
+IP_FLAG=""
+[[ -n "${IP_ADDR}" ]] && IP_FLAG="--ip-address=${IP_ADDR}"
+
+# --force: create the host record even if DNS doesn't resolve it yet.
+if $DRY_RUN; then
+  echo "[dry-run] ssh ${DC_USER}@${DC_HOST} sudo ipa host-add '${FQDN}' ${IP_FLAG} --force"
+else
+  HOST_ADD_OUT=$(ssh "${DC_USER}@${DC_HOST}" "sudo ipa host-add '${FQDN}' ${IP_FLAG} --force 2>&1") \
+    && HOST_ADD_RC=0 || HOST_ADD_RC=$?
+  if [[ $HOST_ADD_RC -eq 0 ]]; then
+    echo "${HOST_ADD_OUT}"
+  elif echo "${HOST_ADD_OUT}" | grep -q "already exists"; then
+    logn "(host already registered)"
+  else
+    echo "Error: ipa host-add failed (exit ${HOST_ADD_RC}):" >&2
+    echo "${HOST_ADD_OUT}" >&2
+    exit 1
+  fi
+fi
+
+# --- Step 3: Fetch the keytab from the domain controller ---
+
+log "Fetching keytab for host/${FQDN}"
+
+# Remove the plaintext keytab if the script aborts before encryption completes.
+# The trap is cleared at the end of step 4 once sops has encrypted it in-place.
+trap 'rm -f "${KEYTAB_SECRET}"' EXIT
+
+dc_run "sudo ipa-getkeytab -s '${IPA_SERVER}' -p 'host/${FQDN}' -k '${DC_TMP}'"
+
+if $DRY_RUN; then
+  echo "[dry-run] Would stream ${DC_USER}@${DC_HOST}:${DC_TMP} → secrets/${TARGET}.keytab"
+else
+  logn "Streaming keytab from ${DC_HOST}:${DC_TMP} → secrets/${TARGET}.keytab"
+  # scp can't read a root-owned temp file as ${DC_USER}; pipe through sudo cat instead.
+  ssh "${DC_USER}@${DC_HOST}" "sudo cat '${DC_TMP}'" > "${KEYTAB_SECRET}"
+
+  logn "Removing temp file on ${DC_HOST}"
+  dc_run "sudo rm -f '${DC_TMP}'"
+fi
+
+# --- Step 4: Encrypt in-place ---
+#
+# The file must already be at secrets/<hostname>.keytab (done above) so
+# sops matches the creation rule by path. Using -i (in-place) rather than
+# stdout redirect keeps the path intact through the encrypt call.
+
+log "Encrypting secrets/${TARGET}.keytab in-place with sops"
+run "${SOPS_CMD[@]}" -e --input-type binary -i "${KEYTAB_SECRET}"
+
+# Encryption succeeded — the file is now sops-encrypted; cancel the cleanup trap.
+trap - EXIT
+
+# --- Done ---
+
+if ! $DRY_RUN; then
+  echo ""
+  echo "Done. secrets/${TARGET}.keytab is sops-encrypted and ready."
+  echo ""
+  echo "Next steps:"
+  echo "  1. Verify: grep '\"data\": \"ENC' secrets/${TARGET}.keytab"
+  echo "  2. Stage and commit:"
+  echo "       git add secrets/${TARGET}.keytab .sops.yaml"
+  echo "       git commit -m 'secrets: add IPA keytab for ${TARGET}'"
+  echo "  3. Add to hosts/${TARGET}/host.nix (networking block and imports):"
+  echo ""
+  echo "       networking = {"
+  echo "         hostName = \"${TARGET}\";"
+  echo "         domain   = vars.homeDomain;          # required for Kerberos FQDN"
+  echo "         nameservers = [ vars.domainControllerIp ];  # IPA DNS"
+  echo "         ..."
+  echo "       };"
+  echo ""
+  echo "       imports = ["
+  echo "         (import ../../modules/ipa/client.nix {"
+  echo "           keytabSopsFile = ../../secrets/${TARGET}.keytab;"
+  echo "           caCertFile     = ../../certs/ipa-ca.crt;"
+  echo "         })"
+  echo "       ];"
+  echo ""
+  echo "  4. Deploy: nixos-rebuild switch (or create-proxmox-resource.sh)"
+fi

secrets/nix-cache.keytab

@@ -0,0 +1,26 @@
+{
+	"data": "ENC[AES256_GCM,data:z2bazlADvtWkGcY4an7NgZgIDSDq8KmYpSq8tcBleW/33HlElMNhdmje8m8hd7WxgrVvCQDdlAfodBLj2mjbgSwBptlPX2zbwcmJdm0g0Ope+YyQZucIio7NnBaYa+OK8meWqmxO2WEeOk+hnNfNPbt8MkzF/FMMbP8xv9wSTKP9CDdmO7s8rdg8G1JxVfn9dyaSDUTuA2JGNtbh+osd4CtNCV/bc84MjXDZTgTfT0W/uv8VH3iPNT7BhQbU9FIY4dsFRYBf758VtJ+3mTBiQkR38IevJBvhFB7Wiqn118LSBgjdTKJnBwmGo6lMdo0LRYHEgUnb2ejhWMNie19x+LEAErDki0RBmjc2BbnOF908kUlW2fUPo5fz/hlfqlhDLS1uOxESKhfnKt7s5qzWiMX/nohpknVfyMbmu9j/M571z9sgFnJAylpW3NLp53lX8N9mINwRGXsyL/ijbNE=,iv:M/MNquAGN+lIIyVVvFRgKR6DKAhLclc/OY1HV5Xwoog=,tag:eEuURMErSqsoh+l9ZaHY9Q==,type:str]",
+	"sops": {
+		"age": [
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBqZlUxRG0zR3IzMlpDL3Vl\nNmRWQXUvc1NDek5wbWtKVEFTcTlxL3ZoWldNCmJVMkFtbDkxN1FGQ2VLTlhBUW5Q\nZ3VzL0UydUQ2YnlUMmtqa1Z0d0FSVFUKLS0tIGJFelc4Rm84T3ZHSGZDdnNUbUFM\nRXZHV3N3aVlSOXhUZk04UFRMWU5TbFUKhPU80PVYuDFUCxu1CA8+W8bqkr+Ne2fh\n+nBUPJbGxfN9TyD9tUC77AMbcL1R2L5x+SSAh0bEgSWE24/RjsuVKw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB3M1o3S2FibHV6N2tIOFEx\nRytJRDFIUU05azNDbWlpaDdFQXFRWlBUNnlFCnBwNVB0SEVwL3NWNS9aeG4xSUI1\nV3NOcUFxUUhaODYyWXdFMEhWeFpvancKLS0tIHY4NHFQRGJwUURQbWZ2cGlSdm9s\nOFJodGZkekk3UnBRRUwxb2YrQ1ZPcU0K0tCapb1hfVHFSNpmESXexYa5k9OE9Tha\n51QpU4mZHKGrnWPK/kyj7rHiz95TLsmwUdA8Q2hOiYNSxEaVBjYDQw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1jcx3yajjhghn8qh8za3yeu8nxykzlg3p4nrv03vnfvzl0mzayg2qmg940e"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBkTmNrbUFoVFVGcytzQkk1\nMUxDdmJGL0xDcUNZaDFRQnUwNXoyMU90SEVvCi9EaTlVOGlMeUZtQzRJS1J2TTJY\neWdkMGNFMWZzQXVKOU5KcXVvalk1ekkKLS0tIDN2MlRQcG5aQnN3bUMrSDdvc09X\nM29hQ0pJRzk1amRHaS9mRlhrb2FMZG8KEWkSSP+MqGRU75qo7ctOCL7qHhyCM3l4\nL+ga1XOKxRsQkKQPozCi5Bm+k28W9hIDaC34Rw9difxICM9Z1rAbOA==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1ufg390ydrmma849t9xfkxxl5xvdkk6mngnlzhmy7mvuaje8sgcmsmnq6l7"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA1TUtxVjJ2STFpU3RNdWpJ\nVjcwUHVORVN6L1pKVC9TeWt4cTNoR2pPWVRBCkR4QVJ1bHFUa2Z5aWw1bG0vQWVy\ncjNGRDl5REZzbzdZWTFMRkU1eHFTc1kKLS0tIHNLVDFiRkRKTHhrSEx2S0J1R3cx\nSkdEQWJya1ptTTRqUjJZT3FFaFhkd0kKgecHrnzW9+Eb+b7c0z1yR+Y0Czsr9Kjh\nx1UUOfleHntJUCs8oYcOogKknEnhBJJoJ5oe/gWruRSwle1fs3cBqQ==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1jlltcv5jcnm40z5k0q6hv053k2rqpqvemtuecdwn527uw8uqz4es3x7m68"
+			}
+		],
+		"lastmodified": "2026-07-27T21:22:58Z",
+		"mac": "ENC[AES256_GCM,data:VG2ygV4X6yMxGlJgq3sN4GAzgVqiD06noyMxB2yb/FCmiFVYZAH/9LqF//G7MTInfIjFrTDyoHAny+m/ztUrJkHXI1Fzg0U8R/zYyQ6wj/GguL0gyhA70uriQhvHsRHefHPa7Km61Blo9cME6CBJWejtRvh1IMw9itAioVrSIZE=,iv:zjxNG6IYxkcNqLk08NADoDiIbS6at86y136SBzadW1U=,tag:sj4ZRR7ixU8h7aOUJmTCYg==,type:str]",
+		"version": "3.13.2"
+	}
+}

secrets/pxe-boot.keytab

@@ -0,0 +1,22 @@
+{
+	"data": "ENC[AES256_GCM,data:Q++XWxg9tvY7ugT8+8FWCC5jgOfQ1+LYLsnqN0/WGxTf5XT2VmoXvszcE/ow2BUOBG3qBTXS3OHYFPwmj1GgaBHB8rpdXX6+LveSBE2gmx1VR+NUDTxy+0/DBq411MK9n/J9eIYcybdFIE11biFSAob9EgfxBF5roCDXIPDPyVCSe6LyhNvqYPnGQsfHCbejSewLTcRQEiguP9BX96CpMPIpmaB9fHN25t5RWCgMI7MtacrRxRsyKg44+2FZstXdZrp2Wv9u86BxqdAFqtZE8qpPeGdrdzluZx9jhnw0wZPzHdKg5wS7/UrLCb0UxIQiDxDMDuuBuLGkKXfAhb6SGZU41wWAWYk548iGRUaG+79BO4HhRZNObOFvfsjpMXEfcH/Vbv/wHVY4OpJUPe/ZWK4wpL9YrY4nT0t62HH7MirOy1uhwLE50h2+6dHKj6ur5G7thkSqgzVWXQ==,iv:zaRBwS+gfXLhH30havn6Q2+oPWuLV3qBfbOj00kewlQ=,tag:Vr5iEQ2u+9YNahryhgzwSw==,type:str]",
+	"sops": {
+		"age": [
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSArTGJnaVhleUtsWnlITE1s\nNmRCaW1QWTFNSG5LRFdmb1lzRlV5NWl3YTBNCmF6eUN6RkJBZzc0MmJJa0dKTW01\ncVh4K1VLR2lURUpKQXpxNGpQNnpSUlUKLS0tIFJONnJFWkNCR3pqalRsUW9POVBj\nQ0pFQ3ltKzBETTVXTW5sV1ppWTFJc1kKzxUboNZO+Nwn2eTWy11VP9w1pRswCHaJ\nE2dYU0oUOClVzc0oSuIJxraG6TPj1N4WGC24gS+UmpkmSuCiOeZBsw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBDSmxNR1I3dUFKT0xUVG9h\nWkRIakNVeWRQOEN3blNRVjZlWHF4K2NRa0hBClRiOXlmTTJ4T2JTUEw2c1l0R2N2\nMnRwdDA5bEZlQWJRTm9vUmNKclBSU1EKLS0tIFcyeDFjbTZyVEVDUjN1VzU1VHly\nNWNDMW9rTXY2bHNWYVR0SmtMckovUzQKhTWr6yFVW9am3okCiIswwqR5+/p9OLmB\nWCgPtwoFaBt1RjUXPK4/eS4LlucR2K6V/mNMn4xVsnkIl193U9632g==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age16j42pdc5dr6wnj7xayhkqdj2rny9u68fcqejs50hqq42scssh4gsnrrnlt"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSA2ME9CbmVGcENRWksyL0pW\nOEJyUGhpbGMwWlBhVXBSeXQ2MW1EWnFuR0E4CnMwU0pjdk1YMzF5ZEhTVFlBaHZq\nam94UWVGbjhZSEx6VHBmem9JRWgwYzAKLS0tIHFJZWRyRjRHNzhXdDJSYWN3bDlR\nYVp3eGJWWkh3Y09ZWElyclZQN1ZSVFkKjR32//EcFAdMjVlNgky5zvVkwXwEN68D\nrkTuHKjiO5aV7yAQGPkdNw0UM0oRGF0u4YF3oOUcZfSvnKgDeoi2Zw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1ug787sgt6st6k82fgkrug2lzltw4qsukrrqqs3w27ewwqj8rg4hsxcmylz"
+			}
+		],
+		"lastmodified": "2026-07-28T00:27:46Z",
+		"mac": "ENC[AES256_GCM,data:AbJIHYcFpeanQsJ3x7RPL9Yjlg5BJgkepKax0fL9L/PpA03Antab93iUNG95Mp6k/duovp8Jm445lbuppDZq1dh9ij/deBa8GbzJ50wwEe9zMc3EwRKScpqZEhRPF7KlJsIjsHJyd8NkcI5ji49XkHb4Ae1//8zG5HpVgy+3b04=,iv:uxQCbMwMIfP5S1dbsvIx3F79YWEguxwox8T0YZvUBdc=,tag:3utjmBGDmPc8q4JjaXvCkA==,type:str]",
+		"version": "3.13.2"
+	}
+}

secrets/tailscale-router.keytab

@@ -0,0 +1,26 @@
+{
+	"data": "ENC[AES256_GCM,data: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,iv:kUlVXF4Yl5HGvoLwu9loiuuDVtz0kARRiUU3K+BPL2A=,tag:pVaGzQAX9Etoqc5XMGmNeg==,type:str]",
+	"sops": {
+		"age": [
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSB6OUVUdkoxM1M5THlYZ1ky\nYWJ5RjhtRGoxTldwRkI2T1p6dHR4Y3gwR1ZrCjRDS1hTM01lZ0FSalBYQ1B0bENs\nUytXNmlrUkV4TmJkMUM1QW1ZaExIcGMKLS0tIHdHKzdEcUxvM0ZYUEp0a2d6SHp5\nYXQydy9uNG15V2FhUUd4NEFTMTNNMEUKkIzKEoYzoVs+nhnpkHFgDkQqrWykatND\ntsNxcr1SXSKeEW1m/QpXZnn/aW3zSQR09PqOHf7PYU47/AdkwrUaAg==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1njap586hc0q43kr03g6c8eqhdsmk8zcafkl3f83xwlc2gqhlmfgs4tmwad"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSByZENrck42dWJjR2hYUVBl\ncERtRjR6dTdING5nWXlBc3o3eXFhaSs5NkFRCk43QXFUeTBJR0U5dG9YTDRmQ0Yx\naEo2blUvUXNZY3dpbEZRTUx1elNzdkkKLS0tIHJwNjRNM3V6WktWZ1BlUUtLRTNI\nMTVEbCtYbllIbTdxTGozWUluS3pIRXMKZCruDIkD/JofdAHWgPuaaKTDsz408ZkY\n77mhO8J+kd03qwt6qhFC5KF1lyjhwEnqrOE195+R/8Yl7hA/DsL2ZQ==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1k7d2du5mejsmv5rzavm4xwgpthqvcfsehduquv28nzs53zppa3kqngfxq2"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBxaC95RjYybzVlU2tYdHdU\naGJ4M2IvNkJwVlNIU0VCZEFUZk5VaksrVnpFCmJXS3luTG9WejR0Rk9DbHA3dngy\nRElFWjU1N2xuc3JaKzQ0L0U2Yktib1kKLS0tIFlrK3F0ZFh5Ync3ejVWMzRKTUx2\nZDhxdEMwa3B4TFZUcWdTdktDeGt1QUEKfgYnK2lW3cZuJGaw+bAKDipLuC4S5vK2\nxK2eJB5TP/xXrp0F3lx9sc2b1FOY9Vt9IQ7zVlBqJFkzJrcw8zYJJw==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1zhfyuzlq40reuqlr34gf77852nhs3t6mqfzrqmas8z6sxk7tcfhsungrm0"
+			},
+			{
+				"enc": "-----BEGIN AGE ENCRYPTED FILE-----\nYWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBwOGFkSXNxTUIzLzR1Skk5\nMGZveHFDN3YwVmpwT3VTYkppWEU1aGVpdkhRCjZtRC92bVphd0ZFbzFxVzRUcGk4\nMUd1aWdEbFRaM01FT25JSVRoMTRsNUUKLS0tIDAybmcrYjFVWkFYaGY5TFZjcjFO\nYlZoQjJjN2lFNzd4RlJuSHFlRlNCOFEKgUIPnL2/OJgz9oMYt86/llHa7adTkhs6\n8yGYGV1wtU9aYtUMIR907SfYyZ6M4z8jH2wwzpQLbwQQMLgkejl1jg==\n-----END AGE ENCRYPTED FILE-----\n",
+				"recipient": "age1f7usptjx9rv4rxauasve200gxtdt9jkqhhdqstlf20wvlm7u75rsjfw50m"
+			}
+		],
+		"lastmodified": "2026-07-27T23:14:51Z",
+		"mac": "ENC[AES256_GCM,data:CYhzR0Y29GXvWUBbb13s16v9hDQ4k4Xmd4FUpcyNtHe0L/IrDGkx1WHzAohNGZjGMNB9W3BgiEH85OoOo8r1F82El4/8s2prEJi8AARvQU3+2cmRjjhNCCYQWmJkoF/cZNpw6nVyWzZdfUpPvHjbuf6utlI3rtR0qiCpSo/32S0=,iv:XLKTU2Ute4jMkfRAbXiVGxqP9+fjSs6HwRv1JfTTe7w=,tag:oIqS/1HWQZ7mLWaO7GwLFA==,type:str]",
+		"version": "3.13.2"
+	}
+}

variables.nix

@@ -17,6 +17,7 @@
   dockerIp = "192.168.2.225"; # docker Proxmox VM LAN IP
   pbsIp = "192.168.2.244"; # Proxmox Backup Server LAN IP (not NixOS-managed)
   domainControllerIp = "192.168.2.253"; # FreeIPA domain controller / primary DNS (not NixOS-managed)
+  ipaServer = "domain-controller.sweet.home"; # FreeIPA server hostname (used by security.ipa and Kerberos; must be a resolvable FQDN, not an IP)
 
   # Cross-host references (LAN hostnames/users other hosts reach over the network)
   nixCacheHost = "nix-cache"; # substituter/remote-builder hostname