Incredible PBX Post-Installation Reset the hostname and password: # Set the hostname hostnamectl set-hostname Set the password passwd # for Root admin-pw-change # for FreePBX apache-pw-change # for Reminders and AsteriDex Set Gmail as an SMTP Smarthost Create an App password for your Gmail account: https://support.google.com/accounts/answer/185833?hl=en   /root/enable-gmail-smarthost-for-sendmail Stop Webmin systemctl stop webmin systemctl disable webmin Disable Firewall 系統預設會啟用防火牆,而且不可關閉,這是因為安全考量。某些情況或原因需要將它強制關閉,可以按照下列步驟。 1 停用服務 sudo systemctl disable iptables --now 2 關閉自動啟動 # 取消檔案唯讀 sudo chattr -i /etc/rc.local sudo vi /etc/rc.local # 註解這行,存檔離開 #/usr/local/sbin/iptables-restart # 恢復檔案唯讀 sudo chattr +i /etc/rc.local 3 重啟系統