CSF after "Reboot" All Connection refused

Hi, I have a strange problem. This problem will not occur without CSF installed, Server works fine. CSF is running "Perfect", logs no errors, blocking attacking, can restart by running "csf -r". My IP is already on allow list. Problem start on machine "Reboot". After "Reboot", all port all connections will be refused. Tested from different IP. So I assume there is must something with CSF. However, of cause the regular SSH is refused, so I used pem to SSH in. It worked, and I am able to SSH in. The moment I SSH in, all connections start workout again(even from different IP). I didnt even have to run "csf -x" to disable it. CSF is working fine, blocking abuse connection and sending reports. Its so STRANGE!!!, that sounds like CSF is refusing all connections after "Reboot" until I SSH in on purpose. Please help, what should I looking to find out and fix this problem. My csf.conf is like below, only the sections I commented out. RESTRICT_SYSLOG = "3" SYSLOG_CHECK = "3600" IPV6 = "0" TCP6_IN = TCP6_OUT = FASTSTART = "0" SMTP_BLOCK = "1" SMTP_ALLOWLOCAL = "1" SMTP_ALLOWUSER = "cpanel,webmaster,postmaster" SMTP_ALLOWGROUP = "mail,mailman" X_ARF = "1" LF_TRIGGER_PERM = "3600" LF_FTPD_PERM = "3600" LF_SMTPAUTH_PERM = "3600" LF_EXIMSYNTAX_PERM = "3600" LF_POP3D_PERM = "3600" LF_IMAPD_PERM = "3600" LF_HTACCESS_PERM = "3600" LF_CPANEL_PERM = "3600" LF_APACHE_404 = "300" LF_APACHE_403 = "200" LF_DISTATTACK = "1" LF_DISTSMTP = "1" PT_LIMIT = "0" PT_SSHDHUNG = "1" Please help, what should I looking to find out and fix this problem.