let coredns detect loops

README.md

@@ -268,7 +268,8 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
-* **27.07.20:** - Update Coredns config to prevent issues with non-user-defined bridge networks.
+* **29.07.20:** - Update Coredns config to detect dns loops (existing users need to delete `/config/coredns/Corefile` and restart).
+* **27.07.20:** - Update Coredns config to prevent issues with non-user-defined bridge networks (existing users need to delete `/config/coredns/Corefile` and restart).
 * **05.07.20:** - Add Debian updates and security repos for headers.
 * **25.06.20:** - Simplify module tests, prevent iptables issues from resulting in false negatives.
 * **19.06.20:** - Add support for Ubuntu Focal (20.04) kernels. Compile wireguard tools and kernel module instead of using the ubuntu packages. Make module install optional. Improve verbosity in logs.

readme-vars.yml

@@ -85,7 +85,8 @@ app_setup_block: |
   
 # changelog
 changelogs:
-  - { date: "27.07.20:", desc: "Update Coredns config to prevent issues with non-user-defined bridge networks." }
+  - { date: "29.07.20:", desc: "Update Coredns config to detect dns loops (existing users need to delete `/config/coredns/Corefile` and restart)." }
+  - { date: "27.07.20:", desc: "Update Coredns config to prevent issues with non-user-defined bridge networks (existing users need to delete `/config/coredns/Corefile` and restart)." }
   - { date: "05.07.20:", desc: "Add Debian updates and security repos for headers." }
   - { date: "25.06.20:", desc: "Simplify module tests, prevent iptables issues from resulting in false negatives." }
   - { date: "19.06.20:", desc: "Add support for Ubuntu Focal (20.04) kernels. Compile wireguard tools and kernel module instead of using the ubuntu packages. Make module install optional. Improve verbosity in logs." }

root/defaults/Corefile

@@ -1,3 +1,4 @@
 . {
+    loop
     forward . /etc/resolv.conf
 }