diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index e37ae7a..9aa87f8 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -17,6 +17,7 @@ map $host $upstream_acme_challenge_host {
     invite.hamburg.ccc.de 172.31.17.144:31820;
     keycloak-admin.hamburg.ccc.de 172.31.17.144:31820;
     matrix.hamburg.ccc.de 172.31.17.150:31820;
+    mas.hamburg.ccc.de 172.31.17.150:31820;
     netbox.hamburg.ccc.de 172.31.17.167:31820;
     onlyoffice.hamburg.ccc.de 172.31.17.147:31820;
     pad.hamburg.ccc.de 172.31.17.141:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 4fcc86b..db184b9 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -34,6 +34,7 @@ stream {
         staging.hackertours.hamburg.ccc.de 172.31.17.151:8443;
         netbox.hamburg.ccc.de 172.31.17.167:8443;
         matrix.hamburg.ccc.de 172.31.17.150:8443;
+        mas.hamburg.ccc.de 172.31.17.150:8443;
         element.hamburg.ccc.de 172.31.17.151:8443;
         branding-resources.hamburg.ccc.de 172.31.17.151:8443;
         www.hamburg.ccc.de 172.31.17.151:8443;