SMTP port blocked but do not know why, cpanel
Posted: 21 Apr 2022, 10:31
Hi!
I have been using csf+lfd under cpanel for ages without any problem (thanks cirpy for the great SW).
Port 2525 is one of my SMTP ports and csf.conf includes it in the following:
"TCP_IN"
"SMTP_PORTS"
My clients started calling me today that they cannot send mail. After checking the problem, I saw (telnet hostname 2525) that the 2525 port was blocked globally from outside. "csf -x" made everything work again, but "csf -e" caused problems again. This is not ISP related...
Any ideas how I can narrow down the problem? How come it is blocked by csf?
Thanks,
Dan
I have been using csf+lfd under cpanel for ages without any problem (thanks cirpy for the great SW).
Port 2525 is one of my SMTP ports and csf.conf includes it in the following:
"TCP_IN"
"SMTP_PORTS"
My clients started calling me today that they cannot send mail. After checking the problem, I saw (telnet hostname 2525) that the 2525 port was blocked globally from outside. "csf -x" made everything work again, but "csf -e" caused problems again. This is not ISP related...
Any ideas how I can narrow down the problem? How come it is blocked by csf?
Thanks,
Dan