Postrouting and IP Masquerading in Linux
IPTables is responsible to handle packet filtering in Linux system. IPTables contains several predefined and/or user-defined tables. Each table contains chains and chain contain packet rules. IPTables...
View ArticleA new WordPress Firewall Plugin
I had written a blog post regarding “How to protect your wordpress blog from web injection” before. I had mentioned a firewall plugin called “WordPress Firewall” which used to be very helpful at the...
View ArticlePostrouting and IP Masquerading in Linux
IPTables is responsible to handle packet filtering in Linux system. IPTables contains several predefined and/or user-defined tables. Each table contains chains and chain contain packet rules. IPTables...
View ArticleA new WordPress Firewall Plugin
I had written a blog post regarding “How to protect your wordpress blog from web injection” before. I had mentioned a firewall plugin called “WordPress Firewall” which used to be very helpful at the...
View ArticleLinux How To: Install IPTABLES in CentOS 7 / RHEL 7 Replacing FirewallD
CentOS 7 / RHEL 7 doesn’t come with iptables by default. It uses a full functional firewall system called ‘firewalld’. I have been a big fan of iptables and it’s capability from the very first, and...
View ArticleTroubleshooting: Imunify360 database is corrupt. Application cannot run with...
Error Message: # service imunify360 start Starting imunify360: WARNING [+ 3743ms] defence360agent.utils.check_db|DatabaseError detected: database disk image is malformed WARNING [+ 3766ms]...
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Troubleshoot: Server IP address could not be found
I had a client ticket today, with the following screenshot: The error says, ‘server IP address could not be found’. This type of error means there is a DNS resolution error. There could be 3...
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How to: Use WINMTR to Diagnose Network Issues
MTR is a great tool to understand if there is a routing issue. There are many times, customer says the website/web server is slow or not being able to access the network etc. After some basic checks,...
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