November 2020
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How to avoid unknown security logic flow in Web application

MySQL security flow

Recently I had to work with a HIPPA complaint project and so we will be more conscious about web and application security. I have covered the server security by limit the public access port and installation certain tools like apf, bfd to avoid Web DDoS attack and will be easy since […]

ERROR 2049 (HY000): Connection using old (pre-4.1.1) authentication protocol

While I’m accessing MySQL server 5.5 remotely from a windows server which was MySQL 5.6 libraries installed, I got the following errors.

C:\Documents and Settings\Administrator>mysql -h -ureadusr -p Enter password: ************ ERROR 2049 (HY000): Connection using old (pre-4.1.1) authentication protocol ref used (client option ‘secure_auth’ enabled)

How do I skip this error and able […]

Configuring reverse proxy on IIS7

One of my task requires to publish a web application which running on a diff. port need to be accessed from outside but securely. Most of the people simply open the application port added in firewall to get this done. Unfortunately my requirement does not allow to do that.

So I need to use […]

Integrating LDAP authentication on OpenVPN server

This post is useful for those who wish to integrate OpenVPN user login based on the active directory users. We can manage VPN users through the domain controller easily. configuration steps are very easy and can be done it in 2-3 hours.


1. OpenVPN server having 2 user license is fine. 2. Windows […]

Mysql on Windows : Can’t get hostname for your address

I’m getting this error message while I’m accessing remote mysql database which was running on WAMP.

Simple fix is to add “skip-name-resolve” in my.cnf file which will be shown in MySQL installation directory.

Since the MySQL server is using WAMP environment, You need to put the same line inside [wampmysqld].

The my.cnf file location will […]

IIS: Renewing SSL certificate from .crt and private key file

One of the client migrated a domain to Windows server to Linux which was using a Godaddy UCC certificate.This certificate expired and i have renewed the SSL as most the other domains listed in it hosting on Linux server without using new CSR request. I have download the certificate suitable for IIS from Godaddy account. […]