Updated RocketChat (markdown)

RocketChat.md

@@ -26,6 +26,36 @@ Then set your siteurl of your RocketChat server:
 ```
 sudo snap set rocketchat-server siteurl='https://chat.yourcompany.com'
 ```
+## Fixing RocketChat losing network connectivity at lxc container
+
+To run multiple RocketChat instances, to not let rocketchat-caddy mess up
+main Caddy, main Caddy at Caddyfile needs to proxy to each RocketChat lxc container
+where RocketChat container is running, like this:
+
+https://github.com/wekan/wekan/blob/main/docs/Platforms/FOSS/Snap/Many-Snaps-on-LXC.md
+
+For RocketChat, ofteb lxc containers lose network connectivity.
+Fix was these commands from this webpage:
+https://discuss.linuxcontainers.org/t/containers-do-not-have-outgoing-internet-access/10844/3
+
+```
+for ipt in iptables iptables-legacy ip6tables ip6tables-legacy; do $ipt --flush; $ipt --flush -t nat; $ipt --delete-chain; $ipt --delete-chain -t nat; $ipt -P FORWARD ACCEPT; $ipt -P INPUT ACCEPT; $ipt -P OUTPUT ACCEPT; done
+
+systemctl reload snap.lxd.daemon
+```
+After that, lxc containers needs updates and reboot:
+```
+./into-rocketchat.sh
+
+./update.sh
+
+reboot
+```
+That causes exit from lxc container to main bare metal host or main VM, where under those lxc containers are running.
+
+NOTE: These iptables changes also disables ufw firewall.
+
+Also, it seems that having Hetzner bare metal server firewall enabled at Hetzner control panel does not work well.
 
 ## RocketChat Skip Install Registration Wizard Fix