Layout refactor

Also included provisioning for htpc host

templates/htpc/nftables.j2

@@ -0,0 +1,29 @@
+#!/usr/bin/nft -f
+# vim:set ts=2 sw=2 et:
+
+flush ruleset
+
+table inet filter {
+  chain input {
+    type filter hook input priority 0; policy drop;
+
+    # allow established/related connections
+    ct state { established, related } accept
+
+    # early drop of invalid connections
+    ct state invalid drop
+
+    # allow from loopback
+    iifname lo accept
+
+    # allow icmp
+    ip protocol icmp accept
+    ip6 nexthdr icmpv6 accept
+
+    # allow mDNS
+    udp dport 5353 accept
+
+    # allow ssh
+    tcp dport ssh accept
+  }
+}