My server is under a SYN attack. What can I do?
If you believe you are under a SYN attack, run the
netstat -an |grep :80 |more
You will see a list similar to the following, with several hundred entries:
tcp 0 0 184.108.40.206:80 220.127.116.11:1048 SYN_RECV
tcp 0 0 18.104.22.168:80 22.214.171.124:1167 SYN_RECV
tcp 0 0 126.96.36.199:80 188.8.131.52:1192 SYN_RECV
tcp 0 0 184.108.40.206:80 220.127.116.11:1039 SYN_RECV
tcp 0 0 18.104.22.168:80 22.214.171.124:1048 SYN_RECV
If your kernel was built with syncookie support, you can run the
echo 1 > /proc/sys/net/ipv4/tcp_syncookies
Can SSL Certificates be added to an addon domain when the main account already has one?
Yes. For more information, read our SSL certificate documenation
How can I view the contents of my SSL certificates? How can I tell if my SSL certificate and key are paired correctly?
To view the contents of a certificate, run the
openssl x509 -noout -text -in filename.crt
To view the contents of a private key, run the
openssl rsa -noout -text -in filename.key
If the modulus number and exponent of the certificate and key match, they are paired correctly. If not, they are mismatched and Apache will not start with SSL enabled.
When I use Google Search I am brought to your site. Do I have the QHOSTS virus? How do I remove it?
If you were brought to this site inadvertently after you used a search engine, you may be infected with a virus that affects Windows machines and forwards them to a server that was removed and 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.
Topic revision: r9 - 20 Aug 2013 - 16:01:03 - Main.StacyWyatt