diff --git a/README.md b/README.md
index 5d2079a..8d0397f 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@
 * [opnsense](opnsense/) - a firewall, enterprise level 
 * [qbittorrent](qbittorrent/) - torrent client
 * [portainer](portainer/) - docker management
-* [prometheus_grafana](prometheus_grafana/) - monitoring
+* [prometheus_grafana_loki](prometheus_grafana_loki/) - monitoring
 * [unifi](unifi/) - management utility for ubiquiti devices
 * [snipeit](snipeit/) - IT inventory management
 * [trueNAS scale](trueNASscale/) - network file sharing
diff --git a/network-knowledge-base/readme.md b/network-knowledge-base/readme.md
index 74a65c3..8674295 100644
--- a/network-knowledge-base/readme.md
+++ b/network-knowledge-base/readme.md
@@ -45,6 +45,7 @@ Works same when pinging from archlinux or pinging from win8.1
  
 [TCP vs UDP](https://youtu.be/jE_FcgpQ7Co)
 
-# asdasdasd
-
+# useful links
 
+* https://dnsdumpster.com/<br>
+  can check subdomains registered, ideal would be wildcard certificate