cPanel,WHM and webmail login issue

I have suddenly get the below error message when i try to access the cPanel/WHM.

ERROR :
“A network error occurred while sending your login request. Please try again. If this
condition persists, contact your network service provider.”

Why its happen ?

If you done lots of failed login attempt to cpanel,webmail & whm and you have received the above error message when you try to login cpanel, whm & webamil.

What is the solution ?

Your Internet IP got blacklisted in “cPHulk Brute Force Protection” and you need to remove and make it work. But this scenario you don’t login to corresponding server from your system because
its already in blacked list, so if you have more then one server you can try to login from one terminal to another and REMOVE/WHITELIST your IP from “cPHulk Brute Force Protection” and try to access.
Defiantly you will be login.

Use the below command to white-list (If you have STATIC IP) your IP from cPHulk Brute Force Protection.

root@server10001 [~]# /scripts/cphulkdwhitelist YOURIP

Once if you white-listed your IP, then try to access it.

Another Method

Use the below command to remove your IP from cPHulk Brute Force Protection.

root@server10001 [~]# mysql -u root -p
Enter Password : ******
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 10817
Server version: 5.1.73-cll MySQL Community Server (GPLv2)

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

Connetc cphulkd database, using below command

mysql> connect cphulkd
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Connection id:    10820
Current database: cphulkd

mysql> show tables;
+-------------------+
| Tables_in_cphulkd |
+-------------------+
| auths             |
| blacklist         |
| brutes            |
| good_logins       |
| logins            |
| report            |
| whitelist         |
+-------------------+
7 rows in set (0.00 sec)

Use the below command to check whether your IP got blacklisted at cPHulk Brute Force Protection.

mysql> select IP, BRUTETIME from brutes order by BRUTETIME;
Empty set (0.00 sec)

mysql> select IP, LOGINTIME FROM logins order by LOGINTIME;
+--------------+---------------------+
| IP           | LOGINTIME           |
+--------------+---------------------+
| 93.174.86.73 | 2014-04-28 13:39:55 |
| 93.174.86.73 | 2014-04-28 13:40:07 |
| 93.174.86.73 | 2014-04-28 13:42:04 |
+--------------+---------------------+
3 rows in set (0.00 sec)

If your IP got blacklisted at cPHulk Brute Force Protection. Use the below command to remove it.

mysql> delete from brutes;
Query OK, 0 rows affected (0.00 sec)

mysql> delete from logins;
Query OK, 3 rows affected (0.00 sec)

Finally exit from mysql server.

mysql> quit

Once if you removed your IP, then try to access it. Now you can login without any issues.