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Security Advisory – TCP SACK PANIC – Kernel vulnerabilities – CVE-2019-11477, CVE-2019-11478 & CVE-2019-11479

Redhat Ubuntu reference:https://access.redhat.com/security/vulnerabilities/tcpsackhttps://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-11477.htmlhttps://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md Primarily Impacted Products Red Hat...

How to stop bad bots from visiting your website

Recently I noticed in Google Analytics a lot of referral to the page https://www.mydomain-name.com//h/1486338.html that doesn’t exist on one of my website....

Disable MySQL Strict Mode

This is enabled by default, but you can disable it in one of a couple ways.

Zimbra XXE / SSRF Vulnerability Disclosure

At March 18, 2019 , Rene Ottom, Vice President Product eMail and Collaboration announced that The Zimbra Security team has been...

March 13, 2019: End-of-Life for All TLS-SNI-01 Validation Support

Let’s Encrypt allows subscribers to validate domain control using any one of a few different validation methods....

How to stop using TLS-SNI-01 with Certbot

Let’s Encrypt is removing support for domain validation with TLS-SNI-01. If you’re using Certbot and received an email titled “Action required: Let’s...

Simple PHP Mail test

This is a simple task and sometimes we need this for testing Prerequisites
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MySQL – Restore a Single Table from a FULL mysqldump file

Use the sed command on your bash shell to separate the data of the table that you want to restore. For example, if we want...

Physical Volume is using an old PV header

Situation When running the pvs command the following warning is displayed: 

MegaCLI CheatSheet (2)

Get raid controller log MegaCli64 -adpeventlog -getevents -f lsi-events.log -a0 -nolog Raid Controller and Drive Status

SSH Issue no kex alg

So what is happened? What’s causing it? Well, a modern operating system like Debian Jessie is packaged with OpenSSH 6.7 or newer ...