From 7509d4ed60dfe94cb9c6697f133d7a57b4d221d7 Mon Sep 17 00:00:00 2001
From: June <june@jsts.xyz>
Date: Sun, 11 Jan 2026 00:59:52 +0100
Subject: [PATCH 1/5] grafana(host): allowlist only certain icmpv6 types

---
 inventories/chaosknoten/hosts.yaml                            | 4 ++--
 .../chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf     | 2 +-
 resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf  | 2 --
 .../chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf     | 1 -
 .../public-reverse-proxy/nginx/acme_challenge.conf            | 2 +-
 resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf   | 2 +-
 6 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index 1b88df6..f72e4ac 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -15,9 +15,9 @@ all:
       ansible_user: chaos
       ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
     grafana:
-      ansible_host: grafana-intern.hamburg.ccc.de
+      ansible_host: grafana.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
     tickets:
       ansible_host: tickets.hosts.hamburg.ccc.de
       ansible_user: chaos
diff --git a/resources/chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf b/resources/chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf
index c5b68e1..a6dcdc1 100644
--- a/resources/chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/grafana/nginx/grafana.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 proxy_protocol;
+    listen [::]:8443 ssl proxy_protocol;
     http2 on;
     # 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
diff --git a/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf b/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf
index e2bf4a7..8a509be 100644
--- a/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf
@@ -17,7 +17,6 @@ server {
     server_name loki.hamburg.ccc.de;
 
     listen [::]:50051 ssl;
-    listen 172.31.17.145:50051 ssl;
 
     http2 on;
 
@@ -59,7 +58,6 @@ server {
     server_name loki.hamburg.ccc.de;
 
     listen [::]:443 ssl;
-    listen 172.31.17.145:443 ssl;
 
     http2 on;
 
diff --git a/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf b/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf
index 2c52523..ef2fe07 100644
--- a/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf
@@ -18,7 +18,6 @@ server {
     server_name metrics.hamburg.ccc.de;
 
     listen [::]:443 ssl;
-    listen 172.31.17.145:443 ssl;
     http2 on;
 
     client_body_buffer_size 512k;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index d976089..7af3beb 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -9,7 +9,7 @@ map $host $upstream_acme_challenge_host {
     cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:31820;
     element.hamburg.ccc.de 172.31.17.151:31820;
     git.hamburg.ccc.de 172.31.17.154:31820;
-    grafana.hamburg.ccc.de 172.31.17.145:31820;
+    grafana.hamburg.ccc.de grafana.hosts.hamburg.ccc.de:31820;
     hackertours.hamburg.ccc.de 172.31.17.151:31820;
     staging.hackertours.hamburg.ccc.de 172.31.17.151:31820;
     hamburg.ccc.de 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 c4d1fbc..42120db 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -26,7 +26,7 @@ stream {
         id.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
         invite.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
         keycloak-admin.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
-        grafana.hamburg.ccc.de 172.31.17.145:8443;
+        grafana.hamburg.ccc.de grafana.hosts.hamburg.ccc.de:8443;
         wiki.ccchh.net wiki.hosts.hamburg.ccc.de:8443;
         wiki.hamburg.ccc.de wiki.hosts.hamburg.ccc.de:8443;
         onlyoffice.hamburg.ccc.de onlyoffice.hosts.hamburg.ccc.de:8443;

From d5154927a1022e51e36efb405bd9a292d0df080b Mon Sep 17 00:00:00 2001
From: June <june@jsts.xyz>
Date: Sun, 11 Jan 2026 01:29:15 +0100
Subject: [PATCH 2/5] ccchoir(host): allowlist only certain icmpv6 types

---
 inventories/chaosknoten/hosts.yaml                        | 4 ++--
 resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf       | 8 ++++----
 .../public-reverse-proxy/nginx/acme_challenge.conf        | 4 ++--
 .../chaosknoten/public-reverse-proxy/nginx/nginx.conf     | 4 ++--
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index f72e4ac..4b8e388 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -1,9 +1,9 @@
 all:
   hosts:
     ccchoir:
-      ansible_host: ccchoir-intern.hamburg.ccc.de
+      ansible_host: ccchoir.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
     chaosknoten:
       ansible_host: chaosknoten.hamburg.ccc.de
     cloud:
diff --git a/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf b/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf
index ff37e48..a8d71a9 100644
--- a/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf
+++ b/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf
@@ -2,12 +2,12 @@
 # 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.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 172.31.17.140;
+    set_real_ip_from 2a00:14b0:4200:3000:125::1;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
@@ -43,12 +43,12 @@ server {
 
 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.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 172.31.17.140;
+    set_real_ip_from 2a00:14b0:4200:3000:125::1;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index 7af3beb..0c62760 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -4,8 +4,8 @@ map $host $upstream_acme_challenge_host {
     c3cat.de 172.31.17.151:31820;
     www.c3cat.de 172.31.17.151:31820;
     staging.c3cat.de 172.31.17.151:31820;
-    ccchoir.de ccchoir-intern.hamburg.ccc.de:31820;
-    www.ccchoir.de ccchoir-intern.hamburg.ccc.de:31820;
+    ccchoir.de ccchoir.hosts.hamburg.ccc.de:31820;
+    www.ccchoir.de ccchoir.hosts.hamburg.ccc.de:31820;
     cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:31820;
     element.hamburg.ccc.de 172.31.17.151:31820;
     git.hamburg.ccc.de 172.31.17.154:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 42120db..b3f3636 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -18,8 +18,8 @@ stream {
     resolver 212.12.50.158 192.76.134.90;
 
     map $ssl_preread_server_name $address {
-        ccchoir.de ccchoir-intern.hamburg.ccc.de:8443;
-        www.ccchoir.de ccchoir-intern.hamburg.ccc.de:8443;
+        ccchoir.de ccchoir.hosts.hamburg.ccc.de:8443;
+        www.ccchoir.de ccchoir.hosts.hamburg.ccc.de:8443;
         cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:8443;
         pad.hamburg.ccc.de pad.hosts.hamburg.ccc.de:8443;
         pretalx.hamburg.ccc.de pretalx-intern.hamburg.ccc.de:8443;

From 2fbb37db18c0cb3c01f00d83666524f6c5cc887e Mon Sep 17 00:00:00 2001
From: June <june@jsts.xyz>
Date: Sun, 11 Jan 2026 00:59:52 +0100
Subject: [PATCH 3/5] grafana(host): move to new network and hostname

---
 inventories/chaosknoten/hosts.yaml                            | 4 ++--
 .../chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf     | 2 +-
 resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf  | 2 --
 .../chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf     | 1 -
 .../public-reverse-proxy/nginx/acme_challenge.conf            | 2 +-
 resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf   | 2 +-
 6 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index 1b88df6..f72e4ac 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -15,9 +15,9 @@ all:
       ansible_user: chaos
       ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
     grafana:
-      ansible_host: grafana-intern.hamburg.ccc.de
+      ansible_host: grafana.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
     tickets:
       ansible_host: tickets.hosts.hamburg.ccc.de
       ansible_user: chaos
diff --git a/resources/chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf b/resources/chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf
index c5b68e1..a6dcdc1 100644
--- a/resources/chaosknoten/grafana/nginx/grafana.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/grafana/nginx/grafana.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 proxy_protocol;
+    listen [::]:8443 ssl proxy_protocol;
     http2 on;
     # 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
diff --git a/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf b/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf
index e2bf4a7..8a509be 100644
--- a/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/grafana/nginx/loki.hamburg.ccc.de.conf
@@ -17,7 +17,6 @@ server {
     server_name loki.hamburg.ccc.de;
 
     listen [::]:50051 ssl;
-    listen 172.31.17.145:50051 ssl;
 
     http2 on;
 
@@ -59,7 +58,6 @@ server {
     server_name loki.hamburg.ccc.de;
 
     listen [::]:443 ssl;
-    listen 172.31.17.145:443 ssl;
 
     http2 on;
 
diff --git a/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf b/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf
index 2c52523..ef2fe07 100644
--- a/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/grafana/nginx/metrics.hamburg.ccc.de.conf
@@ -18,7 +18,6 @@ server {
     server_name metrics.hamburg.ccc.de;
 
     listen [::]:443 ssl;
-    listen 172.31.17.145:443 ssl;
     http2 on;
 
     client_body_buffer_size 512k;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index d976089..7af3beb 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -9,7 +9,7 @@ map $host $upstream_acme_challenge_host {
     cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:31820;
     element.hamburg.ccc.de 172.31.17.151:31820;
     git.hamburg.ccc.de 172.31.17.154:31820;
-    grafana.hamburg.ccc.de 172.31.17.145:31820;
+    grafana.hamburg.ccc.de grafana.hosts.hamburg.ccc.de:31820;
     hackertours.hamburg.ccc.de 172.31.17.151:31820;
     staging.hackertours.hamburg.ccc.de 172.31.17.151:31820;
     hamburg.ccc.de 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 c4d1fbc..42120db 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -26,7 +26,7 @@ stream {
         id.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
         invite.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
         keycloak-admin.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
-        grafana.hamburg.ccc.de 172.31.17.145:8443;
+        grafana.hamburg.ccc.de grafana.hosts.hamburg.ccc.de:8443;
         wiki.ccchh.net wiki.hosts.hamburg.ccc.de:8443;
         wiki.hamburg.ccc.de wiki.hosts.hamburg.ccc.de:8443;
         onlyoffice.hamburg.ccc.de onlyoffice.hosts.hamburg.ccc.de:8443;

From 372f264bcbc7de743c6cda57126395f7df906b47 Mon Sep 17 00:00:00 2001
From: June <june@jsts.xyz>
Date: Sun, 11 Jan 2026 01:29:15 +0100
Subject: [PATCH 4/5] ccchoir(host): move to new network and hostname

---
 inventories/chaosknoten/hosts.yaml                        | 4 ++--
 resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf       | 8 ++++----
 .../public-reverse-proxy/nginx/acme_challenge.conf        | 4 ++--
 .../chaosknoten/public-reverse-proxy/nginx/nginx.conf     | 4 ++--
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index f72e4ac..4b8e388 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -1,9 +1,9 @@
 all:
   hosts:
     ccchoir:
-      ansible_host: ccchoir-intern.hamburg.ccc.de
+      ansible_host: ccchoir.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
     chaosknoten:
       ansible_host: chaosknoten.hamburg.ccc.de
     cloud:
diff --git a/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf b/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf
index ff37e48..a8d71a9 100644
--- a/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf
+++ b/resources/chaosknoten/ccchoir/nginx/ccchoir.de.conf
@@ -2,12 +2,12 @@
 # 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.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 172.31.17.140;
+    set_real_ip_from 2a00:14b0:4200:3000:125::1;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
@@ -43,12 +43,12 @@ server {
 
 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.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 172.31.17.140;
+    set_real_ip_from 2a00:14b0:4200:3000:125::1;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index 7af3beb..0c62760 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -4,8 +4,8 @@ map $host $upstream_acme_challenge_host {
     c3cat.de 172.31.17.151:31820;
     www.c3cat.de 172.31.17.151:31820;
     staging.c3cat.de 172.31.17.151:31820;
-    ccchoir.de ccchoir-intern.hamburg.ccc.de:31820;
-    www.ccchoir.de ccchoir-intern.hamburg.ccc.de:31820;
+    ccchoir.de ccchoir.hosts.hamburg.ccc.de:31820;
+    www.ccchoir.de ccchoir.hosts.hamburg.ccc.de:31820;
     cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:31820;
     element.hamburg.ccc.de 172.31.17.151:31820;
     git.hamburg.ccc.de 172.31.17.154:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index 42120db..b3f3636 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -18,8 +18,8 @@ stream {
     resolver 212.12.50.158 192.76.134.90;
 
     map $ssl_preread_server_name $address {
-        ccchoir.de ccchoir-intern.hamburg.ccc.de:8443;
-        www.ccchoir.de ccchoir-intern.hamburg.ccc.de:8443;
+        ccchoir.de ccchoir.hosts.hamburg.ccc.de:8443;
+        www.ccchoir.de ccchoir.hosts.hamburg.ccc.de:8443;
         cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:8443;
         pad.hamburg.ccc.de pad.hosts.hamburg.ccc.de:8443;
         pretalx.hamburg.ccc.de pretalx-intern.hamburg.ccc.de:8443;

From 1971598e71379ed967b8790353dd2ac6dc854712 Mon Sep 17 00:00:00 2001
From: June <june@jsts.xyz>
Date: Sun, 11 Jan 2026 03:22:11 +0100
Subject: [PATCH 5/5] pretalx(host): move to new network and hostname

---
 inventories/chaosknoten/hosts.yaml                            | 4 ++--
 .../chaosknoten/pretalx/nginx/cfp.eh22.easterhegg.eu.conf     | 4 ++--
 .../chaosknoten/pretalx/nginx/pretalx.hamburg.ccc.de.conf     | 4 ++--
 .../public-reverse-proxy/nginx/acme_challenge.conf            | 2 +-
 resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf   | 4 ++--
 5 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/inventories/chaosknoten/hosts.yaml b/inventories/chaosknoten/hosts.yaml
index 4b8e388..d5dea1c 100644
--- a/inventories/chaosknoten/hosts.yaml
+++ b/inventories/chaosknoten/hosts.yaml
@@ -45,9 +45,9 @@ all:
       ansible_user: chaos
       ansible_ssh_common_args: -J ssh://chaos@router.hamburg.ccc.de
     pretalx:
-      ansible_host: pretalx-intern.hamburg.ccc.de
+      ansible_host: pretalx.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
     public-reverse-proxy:
       ansible_host: public-reverse-proxy.hamburg.ccc.de
       ansible_user: chaos
diff --git a/resources/chaosknoten/pretalx/nginx/cfp.eh22.easterhegg.eu.conf b/resources/chaosknoten/pretalx/nginx/cfp.eh22.easterhegg.eu.conf
index 0fa99e7..a4f5bb9 100644
--- a/resources/chaosknoten/pretalx/nginx/cfp.eh22.easterhegg.eu.conf
+++ b/resources/chaosknoten/pretalx/nginx/cfp.eh22.easterhegg.eu.conf
@@ -2,12 +2,12 @@
 # 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.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 172.31.17.140;
+    set_real_ip_from 2a00:14b0:4200:3000:125::1;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/pretalx/nginx/pretalx.hamburg.ccc.de.conf b/resources/chaosknoten/pretalx/nginx/pretalx.hamburg.ccc.de.conf
index f12067a..d66e977 100644
--- a/resources/chaosknoten/pretalx/nginx/pretalx.hamburg.ccc.de.conf
+++ b/resources/chaosknoten/pretalx/nginx/pretalx.hamburg.ccc.de.conf
@@ -2,12 +2,12 @@
 # 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.
     # First set our proxy protocol proxy as trusted.
-    set_real_ip_from 172.31.17.140;
+    set_real_ip_from 2a00:14b0:4200:3000:125::1;
     # Then tell the realip_module to get the addreses from the proxy protocol
     # header.
     real_ip_header proxy_protocol;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
index 0c62760..71f0290 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/acme_challenge.conf
@@ -22,7 +22,7 @@ map $host $upstream_acme_challenge_host {
     netbox.hamburg.ccc.de netbox.hosts.hamburg.ccc.de:31820;
     onlyoffice.hamburg.ccc.de onlyoffice.hosts.hamburg.ccc.de:31820;
     pad.hamburg.ccc.de pad.hosts.hamburg.ccc.de:31820;
-    pretalx.hamburg.ccc.de 172.31.17.157:31820;
+    pretalx.hamburg.ccc.de pretalx.hosts.hamburg.ccc.de:31820;
     spaceapi.hamburg.ccc.de 172.31.17.151:31820;
     staging.hamburg.ccc.de 172.31.17.151:31820;
     wiki.ccchh.net wiki.hosts.hamburg.ccc.de:31820;
diff --git a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
index b3f3636..d7cd97e 100644
--- a/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
+++ b/resources/chaosknoten/public-reverse-proxy/nginx/nginx.conf
@@ -22,7 +22,7 @@ stream {
         www.ccchoir.de ccchoir.hosts.hamburg.ccc.de:8443;
         cloud.hamburg.ccc.de cloud.hosts.hamburg.ccc.de:8443;
         pad.hamburg.ccc.de pad.hosts.hamburg.ccc.de:8443;
-        pretalx.hamburg.ccc.de pretalx-intern.hamburg.ccc.de:8443;
+        pretalx.hamburg.ccc.de pretalx.hosts.hamburg.ccc.de:8443;
         id.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
         invite.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
         keycloak-admin.hamburg.ccc.de keycloak.hosts.hamburg.ccc.de:8443;
@@ -90,7 +90,7 @@ stream {
         woodpecker.hamburg.ccc.de 172.31.17.160:8443;
         design.hamburg.ccc.de 172.31.17.162:8443;
         hydra.hamburg.ccc.de 172.31.17.163:8443;
-        cfp.eh22.easterhegg.eu pretalx-intern.hamburg.ccc.de:8443;
+        cfp.eh22.easterhegg.eu pretalx.hosts.hamburg.ccc.de:8443;
         ntfy.hamburg.ccc.de 172.31.17.149:8443;
         cryptoparty-hamburg.de 172.31.17.151:8443;
         cryptoparty.hamburg.ccc.de 172.31.17.151:8443;