1 files changed, 44 insertions, 0 deletions
diff --git a/os/kay/modules/dns/ddns.nix b/os/kay/modules/dns/ddns.nix
new file mode 100644
index 0000000..e6e417a
--- /dev/null
+++ b/os/kay/modules/dns/ddns.nix
@@ -0,0 +1,44 @@
+{ pkgs,  ... }: {
+   services.pppd.script = {
+      "02-ddns-ipv4" = {
+         runtimeInputs = with pkgs; [ coreutils knot-dns ];
+         type = "ip-up";
+
+         text = ''
+            cat <<- EOF | knsupdate
+                    server  2001:470:ee65::1
+                    zone    sinanmohd.com.
+
+                    update  delete  sinanmohd.com.       A
+                    update  add     sinanmohd.com.       180     A       $4
+
+                    update  delete  mail.sinanmohd.com.  A
+                    update  add     mail.sinanmohd.com.  180     A       $4
+
+                    send
+            EOF
+         '';
+       };
+
+      "02-ddns-ipv6" = {
+         runtimeInputs = with pkgs; [ coreutils knot-dns iproute2 gnugrep ];
+         type = "ipv6-up";
+
+         text = ''
+            while ! ipv6="$(ip -6 addr show dev "$1" scope global | grep -o '[0-9a-f:]*::1')"; do
+               sleep 0.2
+            done
+
+            cat <<- EOF | knsupdate
+                    server  2001:470:ee65::1
+                    zone    sinanmohd.com.
+
+                    update  delete  sinanmohd.com.  AAAA
+                    update  add     sinanmohd.com.  180     AAAA    $ipv6
+
+                    send
+            EOF
+         '';
+       };
+    };
+}