some clients on server couldn't access vb sometimes. this error occured
You don't have permission to access /vb/showthread.php on this server.
So I checked /usr/local/apache/logs/error_log and found this error
client denied by server configuration: /home/USER_NAME/public_html/vb/showthread.php
what does it mean, and How it was happened sometimes not all time?
That type msg. usually means the IP is blocked through the .htaccess file of the account itself or, in this case, perhaps the .htaccess file of the script being used. Account Owners' can block whomever they want using an .htaccess file in any directory and an error msg. will be created. When blocking an IP through Server files, (httpd.conf or IP tables for example), no error msg. is created.
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I stopped apf completely by apf -f also flush, save and stop iptables completely. after it i run iptables -L to check Is there any blocked IP? result said no blocked IP.
but problem still happened why?Because dosevasive.c dependence on IPs and Unfortunately, most people from my country connecting to Internet via same IP that's cause dosevasive.c them IP.
so i remove this module and problem solved.
now Que. is how dosevasive.c block IP without iptables or apf running.