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It seems LFD outputs its "blocked" messages (eg. "Firewall: *UDP_IN Blocked* IN=eth0...") ... gold-coloured in my TTY, but more annoyingly it gets spammed out to my VPS's emergency console standard output, putting out lines every few seconds. Is there a way to get LFD ...

... Account Tracking... SSH Tracking... Webmin Tracking... SU Tracking... Console Tracking... *Error* pid mismatch or missing, at line 1160 daemon ... @cmd) = @_; my $cmdline = join(" ",@cmd); my $status = 0; my @output; if (-e "/etc/csf/csf.error") { &cleanup(__LINE__,"*Error* ...

I solved this in a different way on CentOS 6 from this answer https://superuser.com/a/351402

In /etc/sysctl.conf

Tweak the kernel.printk line.
Activate without rebooting:

... server then uninstall CSF and installit again because we had no "Console" to execute the commands on our Datacenter, but we had an external ... csf... Flushing chain `INPUT' Flushing chain `FORWARD' Flushing chain `OUTPUT' Flushing chain `ALLOWIN' Flushing chain `ALLOWOUT' Flushing chain ...

... hits increased server load average to a huge number, I will paste the output kernel messages I got at the console while under this attack, what csf option would help me prevent this kind of attack? ...

... Which when looking at the lfd.log file is not surprising, as the output on that is: Failed SSH login from <ip> (hostname): 5 in the last 3600 ... /var/log/auth.log and one tail -f /var/log/lfd.log, and also the system console tail -f /var/log/lfd.log. From a local terminal on my laptop, I start ...

for anyone else looking to fix this.

The following command will suppress the messages.

dmesg -n 1

to suppress all messages from the kernel (and its drivers) except panic messages from appearing on the console.

To fix at each boot, add the command to:
/etc/rc.local

I came across viewtopic.php?t=222 byt its over 5 years old.

Is there anyway to stop CSF from outputting to the console? It spits out so much it prevents me from logging on to my server (CentOS 6.4 with WHM 11.40.16)

Just suppresses console output if I recall correctly.

Could be that Jonathan or Sarah will weigh in here at some point and clarify the cron aspect.

(btw, where can I see which version is it?)

In ssh console type the following: You will get an output like this:
csf: v5.73 (cPanel)