cPanel

Warning: cPanel is unable to verify that this server is an authoritative nameserver

When trying to add DKIM and SPF records to my domain and I’m getting the error “Warning: cPanel is unable to verify that this server is an authoritative nameserver for domain.com”

Warning: cPanel is unable to verify that this server is an authoritative nameserver

That message typically indicates the use of external name servers for the domain name associated with the account. So since the domain domain.com is using outside server nameservers you would actually just need to copy the DKIM and SPF records and add them in the DNS zone where DNS is hosted.

How to enable Xcache in cPanel

How to enable Xcache in cPanel to speed up website?
Xcache can be enabled in cPanel by using Easy Apache.

Log into your cPanel server. After you login, search for “EasyApache” in left column and click on the link. Select “Previously Saved Config” and click on “start customizing”. For both Apache and PHP, click on “next step” button. Look for “xcache for php” and check the box. Click on “save and build”. Allow the build process to finish.

To enable xcache, you will need to make changes to php.ini before it can be used by your scripts. 

# nano  /usr/local/lib/php.ini

Here is recommended settings for xcache in cPanel —

xcache.admin.pass=””
xcache.admin.user=”mOo”
xcache.cacher=”On”
xcache.coredump_directory=””
xcache.count=”1″
xcache.coveragedump_directory=”/tmp/pcov/”
xcache.coverager=”Off”
xcache.gc_interval=”300″
xcache.mmap_path=”/dev/zero”
xcache.optimizer=”On”
xcache.readonly_protection=”Off”
xcache.size=”50M”
xcache.slots=”8K”
xcache.test=”Off”
xcache.ttl=”3600″
xcache.var_count=”2″
xcache.var_gc_interval=”300″
xcache.var_maxttl=”7200″
xcache.var_size=”16M”
xcache.var_slots=”8K”
xcache.var_ttl=”3600″

Make necessary changes and save. Aftererwards you will need to restart Apache in WHM for changes to take affect

# service http restart

Cpanel on Cloudflare looks weird

The issue is that cpanel from the https://domain.com:2083 looks like its missing css or files…

Symptom:
You try to access your cPanel behind CloudFlare and are finding that on the first page load that no images (or stylesheets or javascript) load – and, when trying to navigate to any link, you are immediately logged out. The experience is as if cPanel were broken in some way.

Cause:
cPanel has an option called “Cookie IP Validation”. This setting checks that the IP address that the visitor originally came from matches their IP address on subsequent requests. With CloudFlare, the IP address for requests to your server can variably come from any IP address in the list at https://www.cloudflare.com/ips

Resolution:
To resolve this issue, in your WHM, navigate to “Tweak Settings” -> “Security” -> “Cookie IP Validation”. On this screen, set the value for “Cookie IP Validation” to “disabled”. After this, loading your cPanel WHM interface through CloudFlare should work as expected.

Other resources:

https://support.cloudflare.com/hc/en-us/articles/200063289-My-cPanel-won-t-load-or-keeps-logging-me-out-after-enabling-CloudFlare

https://forums.cpanel.net/threads/cpanel-looks-stupid-when-i-log-in.266321/

https://support.cloudflare.com/hc/en-us/articles/200169276-How-do-I-use-cPanel-with-CloudFlare-

Php 4 on cpanel

Here are a few articles that mention it:

https://documentation.cpanel.net/display/EA/Custom+Modules
https://forums.cpanel.net/threads/how-to-easy-php4-php5-side-by-side-after-removal-of-php4-from-easyapache.304942/

The End of PHP 4


https://www.siteground.com/kb/how_to_have_different_php__mysql_versions/

You can set the handler for the site using a .htaccess file in the domains webroot with the following contents:
Code:
AddHandler application/x-httpd-php4 .php .php4 .php3

Percona with cPanel: libmysqlclient.so.18: cannot open shared object file

A recent Percona upgrade caused problems with PHP on some cPanel servers. The name of the libmysqlclient library was changed without keeping a symlink to the original name, which caused PHP to throw errors, and EasyApache not compiling successfully.

Running php -v will show it…

php -v
php: error while loading shared libraries: libmysqlclient.so.18: cannot open shared object file: No such file or directory

From the Percona Server 5.5.36-34.0 Release Notes: https://my.fusioned.net/knowledgebase/10100/Percona-with-cPanel-libmysqlclientso18-cannot-open-shared-object-file.html

In order to comply with Linux distribution packaging standards Percona‘s version of libmysqlclient has been renamed to libperconaserver. The old name was conflicting with the upstream libmysqlclient. Except for packaging, libmysqlclient and libperconaserverclient of the same version do not have any differences. Users wishing to continue using libmysqlclient will have to install the corresponding package of their distribution, such as mysql-lib for CentOS and libmysqlclient18 for Ubuntu/Debian. Users wishing to build software against libperconaserverclient should install libperconaserverclient-dev package. An old version of Percona-built libmysqlclient will be available for download.

You simply need to symlink libperconaserver to libmysqlclient, and here’s how it’s done:


# ln -s /usr/lib64/libperconaserverclient.so /usr/lib64/libmysqlclient.so
# ln -s /usr/lib64/libperconaserverclient.so.18 /usr/lib64/libmysqlclient.so.18

(Note: for RHEL/CentoOS/CL 6 x86, replace /usr/lib64 with /usr/lib)

Finally, re-run EasyApache to compile PHP against the new libraries:


# /scripts/easyapache --build

Note: After running this, this error appeared on php sites…


ERROR: Database Error: The MySQL adapter "mysql" is not available.

Checked and the symlinks were not real as there were missing files.

Check perconal rpm’s

rpm -qa |grep PerconaPercona-Server-shared-compat-5.5.35-rel33.0.611.rhel5
Percona-Server-shared-56-5.6.16-rel64.0.el5
Percona-Server-client-56-5.6.16-rel64.0.el5
Percona-Server-devel-56-5.6.16-rel64.0.el5
Percona-Server-server-56-5.6.16-rel64.0.el5

I removed the symlinks and applied

Removed the symlinks and then followed this cpanel article symlink at the bottom to rebuild.

Another resource:
https://documentation.cpanel.net/display/CKB/How+to+Replace+MySQL+with+Percona

Cpanel Documentation
https://documentation.cpanel.net/display/CKB/How+to+Update+a+Percona+Installation

PhalconPHP

Installation

Clone this repository into /var/cpanel/easy/apache/custom_opt_mods/ like so:


# cd /var/cpanel/easy/apache/custom_opt_mods/
# git clone https://github.com/thecpaneladmin/EA-PhalconPHP.git .
# /scripts/easyapache

Git on cpanel is at 

# /usr/local/cpanel/3rdparty/bin/git

Or use the .zip:


# cd /usr/src
# wget https://github.com/thecpaneladmin/EA-PhalconPHP/archive/master.zip
# unzip -d /var/cpanel/easy/apache/custom_opt_mods/ master.zip
# /scripts/easyapache

Make sure that the path is 


/var/cpanel/easy/apache/custom_opt_mods]# ls -la

drwxr-xr-x 4 root root  4096 Sep  2 20:26 ./
drwxr-xr-x 9 root root  4096 Sep  2 20:38 ../
drwxr-xr-x 3 root root  4096 Sep  2 20:26 Cpanel/
-rw-r--r-- 1 root root   606 Sep  2 20:32 error_log
drwxr-xr-x 7 root root  4096 Sep  2 20:26 .git/
-rw-r--r-- 1 root root 18025 Sep  2 20:26 LICENSE
-rw-r--r-- 1 root root   834 Sep  2 20:26 README.md

Or it will not show up in easy apache.

From here, select Phalcon from the list of PHP modules. The module will be loaded from /usr/local/lib/php.ini.

How do I change maximum email size in cPanel?

There is no max file size limit that can be sent and received, however, cPanel defaults the limit to 50mb. You can change this in cPanel.

To change this do the following,

Login to cPanel as admin
Under Service Configuration, Click “exim Configuration Manager”
Click “Advanced Editor”
Scroll down and Click “Add additional Configuration Setting”
Find “message_size_limit” in pull-down list and choose
Enter limit that you want to change to
Scroll to bottom and click “save”

Email Alerts for Pureftpd on WHM

WHM show the service as down.


Server domain.com
Primary IP Address 69.xx.xx.xx
Service Name ftpd
Service Status failed
Notification The service ?ftpd? appears to be down.
Service Check Method The system?s command to check or to restart this service failed.
Number of Restart Attempts 258
Startup Log

Do the following…

# cd /var/run
# mv pure-ftpd.pid pure-ftpd.pid.bk

Restart ftpd in WHM under Service