diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index 14fe23a..fab9127 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -19,9 +19,9 @@ all:
       ansible_user: chaos
       ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
     tickets:
-      ansible_host: tickets-intern.hamburg.ccc.de
+      ansible_host: tickets.hosts.hamburg.ccc.de
       ansible_user: chaos
-      ansible_ssh_common_args: -J ssh://chaos@public-reverse-proxy.hamburg.ccc.de
+      ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
     keycloak:
       ansible_host: keycloak.hosts.hamburg.ccc.de
       ansible_user: chaos
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index 06595e3..b8b44b5 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -28,7 +28,7 @@ map $host $upstream_acme_challenge_host {
     wiki.ccchh.net wiki.hosts.hamburg.ccc.de:31820;
     wiki.hamburg.ccc.de wiki.hosts.hamburg.ccc.de:31820;
     www.hamburg.ccc.de 172.31.17.151:31820;
-    tickets.hamburg.ccc.de 172.31.17.148:31820;
+    tickets.hamburg.ccc.de tickets.hosts.hamburg.ccc.de:31820;
     sunders.hamburg.ccc.de sunders.hosts.hamburg.ccc.de:31820;
     zammad.hamburg.ccc.de 172.31.17.152:31820;
     eh03.easterhegg.eu 172.31.17.151:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 78a91ff..e540f13 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -42,7 +42,7 @@ stream {
         hamburg.ccc.de 172.31.17.151:8443;
         staging.hamburg.ccc.de 172.31.17.151:8443;
         spaceapi.hamburg.ccc.de 172.31.17.151:8443;
-        tickets.hamburg.ccc.de 172.31.17.148:8443;
+        tickets.hamburg.ccc.de tickets.hosts.hamburg.ccc.de:8443;
         sunders.hamburg.ccc.de sunders.hosts.hamburg.ccc.de:8443;
         zammad.hamburg.ccc.de 172.31.17.152:8443;
         c3cat.de 172.31.17.151:8443;
diff --git a/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf b/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf
index 9e2ca26..8d36244 100644
--- a/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/tickets/nginx/tickets.hamburg.ccc.de.conf
@@ -2,7 +2,7 @@
 # https://ssl-config.mozilla.org/#server=nginx&version=1.17.7&config=intermediate&openssl=1.1.1k&guideline=5.6
 server {
     # Listen on a custom port for the proxy protocol.
-    listen 8443 ssl http2 proxy_protocol;
+    listen [::]:8443 ssl http2 proxy_protocol;
     # Make use of the ngx_http_realip_module to set the $remote_addr and
     # $remote_port to the client address and client port, when using proxy
     # protocol.