BTR Naidu

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Cloudflare and ssh

July 29, 2019 / Leave a Comment

If you are using Cloudflare as firewall for content delivery then please note that Cloudflare only proxies http/https traffic. i.e., it would be impossible to reach your server through any other service like ssh/ftp/sftp etc. If you need to connect to your origin using another protocol (SSH, FTP, SMTP, etc.) you need to do so … [Read more…]

Posted in: Cloudflare, Linux, ssh Tagged: cloudflare, content delivery service, networking, ssh

Android Studio QuickSheet

June 17, 2019 / Leave a Comment

Quick sheet for Android Studio COMMAND EXPLAINATION Shift Twice Search everywhere CTRL+E / Command+E Recently opened files CTRL+Shift+A / Command+Shift+A Find action CTRL+ALT+SHIFT+N / Command+Option+O Search by Symbol Name ALT+Insert / Command+N Generate Code CTRL+O / Command+O Override Methods CTRL+Y / Command+Backspace Delete Line at Cursor CTRL+Space / Command+Space Basic Code Completion CTRL+ALT+L / Command+Option+L … [Read more…]

Posted in: Android Tagged: Android studio, Keyboard shortcuts, Quick sheet

Wildcard SSL cert using letsencrypt and acme.sh

November 8, 2018 / Leave a Comment

Earlier I published an article on generating wildcard ssl certs using certbot-auto.  With the latest update of letsencrypt, auto-renew became a challenge as letsencrypt wanted to authenticate that you still own the domain by creating a TXT record in your domain.  After a series of discussion on my issue about “how to renew the certificate … [Read more…]

Posted in: letsencrypt Tagged: #ssl, cert, letsencrypt

Wildcard SSL cert using LetsEncrypt

September 13, 2018 / Leave a Comment

LetsEncrypt now supports / issues wildcard SSL certificates.   If you have been a letsencrypt user then you will very much welcome this feature.  So lets start with how to do this. Assumptions:

Posted in: letsencrypt, Linux, Ubuntu Tagged: #ssl, cert, letsencrypt, wildcard

URL with Malware in pdf attachment

September 12, 2018 / Leave a Comment

Today I received an email from “Barclays <ruman@antimbd.com>” having subject “Account Alert – You have a new bill from Bank of America Credit Card“.

Posted in: General Tagged: malicious email attachmenents, malicious links, malware, malware attacks, malware attacks via email, pushing attacks

Two step authentication

February 13, 2018 / Leave a Comment

As safe as a bank locker.  One key with the bank and another with you.

Posted in: Google

Have you assigned attorney for your online data?

February 8, 2018 / Leave a Comment

In today’s online world, most of our data is stored online.  If you use Gmail or Google Chrome or an Android phone then it is very likely that your contacts, location, conversations, search history are all stored in Google servers.

Posted in: Google

Earn free ArtByte Coins

October 22, 2017 / Leave a Comment

With all the hype around digital / crypto coins, a new comer will find it difficult to understand where to start with.  To understand things / terminologies around crypto coins like wallet, address, mining, ArtByte will be a good place to start with.  So lets learn how to earn some free crypto coins.  ArtBytes in … [Read more…]

Posted in: CryptoCurrency Tagged: artbytes, crypt coins, digital currency, free artbytes, free coins, how to earn free coins

Speed up ssh login

April 11, 2017 / Leave a Comment

Below setting in /etc/ssh/sshd_config made the ssh login ultra fast. UseDNS  no This was done on CentOS 7.3.  After this change, restart the sshd service and enjoy the speed. 🙂

Posted in: CentOS, Linux, ssh Tagged: cent os, centos 7, speed up, ssh, ssh login

Letsencrypt – Generating certificate and deploy on production server

March 10, 2017 / Leave a Comment

I had a situation where I do not wanted to install all the libs required by LetsEncrypt on a production server.  For the mere fear of breaking the running apps. I went on exploring how to setup a server to generate SSL certs with letsencrypt and deploy the generated certs on the production server.  Below I describe … [Read more…]

Posted in: CentOS, letsencrypt, Linux Tagged: #apache, #centos, #certificate, #ssl, letsencrypt
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