+* Port Forwardings:
+** 2222/tcp → [[theodem]]:22 (SSH für Vorstands-gitolite)
+** 20022/tcp → [[shelog]]:22 (SSH für Shell-Server)
+** 64738/tcp,udp → [[telmir]] (Mumble)
+** 61553/tcp,udp → [[fredo]] (tinc))
+** 11370/tcp → [[huryn]] (SKS Keyserver sync)
+** 8448/tcp → [[metiadoc]] (Matrix federation)
+** 113/tcp → [[metiadoc]] (identd für IRC-Bridge)
+* LetsEncrypt:
+** Relevante Doku in <tt>/usr/share/doc/letsencrypt.sh/</tt>
+** neue Domains in <tt>/etc/letsencrypt.sh/domains.txt</tt> eintragen
+** Hook in <tt>/etc/letsencrypt.sh/hooks.sh</tt>: aktualisiert DNS-TLSA-Records, wartet TTL ab und deployt Certs nach <tt>/var/lib/letsencrypt.sh/live-certs/</tt>
+** in cron.daily: <tt>letsencrypt.sh -c -k /etc/letsencrypt.sh/hooks.sh; systemctl restart nginx</tt>
+** für Tests bitte ''unbedingt'' die staging-API ohne Rate Limiting benutzen, siehe <tt>CA=...</tt> in <tt>/etc/letsencrypt.sh/config.sh</tt>
+
+== SSH-Proxy per Gandolf ==
+
+ Host gandolf
+ HostName gandolf.stratum0.org
+
+ Host telmir smaut huryn errond-1 jamwise gitli
+ ProxyCommand ssh -q -x gandolf -W %h:22