For cPanel & WHM version 64
My server is under a SYN attack. What can I do?
If you believe that you are under a SYN attack, run the
netstat -an |grep :80 |more command.
A list that is similar to the following example will appear, with several hundred entries:
If your kernel was built with
syncookie support, run the
echo 1 > /proc/sys/net/ipv4/tcp_syncookies command as the
Yes. For more information, read our SSL certificate documenation.
How can I view the contents of my SSL certificates? How can I know whether my SSL certificate and key paired correctly?
To view the contents of a certificate, run the
openssl x509 -noout -text -in filename.crt command.
To view the contents of a private key, run the
openssl rsa -noout -text -in filename.key command.
If the modulus number and exponent of the certificate and key match, they paired correctly. If not, they are mismatched and Apache cannot start with SSL enabled.
If you were brought to this site inadvertently after you used a search engine, your system may be infected with a virus that affects Windows machines and forwards them to a server that it replaced with a blank cPanel server.
For more information on this virus, and methods of removal, visit the following sites:
Check these sites before you contact cPanel.