Linux, Windows, Security, Programming, Network Tutorials
SMTP or Simple Mail Transfer Protocol is used to transmit emails between clients, receivers, and email servers. SMTP service generally provided via different ports for network communication and transmission. IMAP and POP3 are other protocols used for email transmission but they are mainly used by email clients where SMTP is used for email servers. In … Read more
Hypertext Transfer Protocol Secure or HTTPS is an extension and secure alternative to the HTTP protocol. HTTPS is very same with the HTTP where the traffic is encrypted using TLS or Transport Layer Security. All major browsers like Google Chrome, Mozilla Firefox, Apple Safari, Opera, Microsoft Edge supports the HTTPS protocol. HTTPS also referred as … Read more
Hypertext Transfer Protocol or HTTP is a protocol used to transmit web pages and its contents like HTML, Image, JavaScript, CSS, etc. HTTP is used in a client-server model where the communication is generally started by the client and the server-side response to the client requests. HTTP History HTTP is created in 1989 by Tim … Read more
PHP programming language standard library supports the cURL library named libcurl. libcurl is a library implementation of the cURL tool which is used to communicate with servers and clients by using popular protocols like HTTP, FTP, etc. cURL can be used for HTTP POST, HTTP PUT, FTP Upload requests. PHP cURL Library PHP cURL library … Read more
Today Firewall is depicted as the main component of the security and networks. Firewalls provide a lot of different operations and features. In the old days, the firewall was simply used to block or allow some ports and management of the NAT. These days there are a lot of different threats where the firewall is … Read more
Common Name or CN is generally used in SSL Certificates. CN is used to define the server name which will be used for secure SSL connection. Generally this SSL certificate used to secure connection between a HTTP/S server and client browser like Chrome, Explorer, Firefox. Common Name (CN) Common Name is used to specify the … Read more
OpenSSL is most popular open source cryptography library which provides a lot of tools, libraries, algorithms about cryptography. It is mostly known with Secure Socket Layers (SSL) and Transport Layer Security (TLS) protocols. Supported Encryption Algorithms Encryption is used to make given data unreadable by the intruders. It is mainly used for confidentiality. OpenSSL supports … Read more
Lftp is a powerful command line tool which supports FTP, HTTP, SFTP, FISH, TORRENT protocols for file and data transfer. As we can see it supports popular data and file transfer protocols. It uses GNU TLS or OpenSSL for SSL/TLS encryption. In this tutorial we will look installing and different examples with lftp . Install lftp … Read more
OpenSSL provides read different type of certificate and encoding formats. OpenSSL supports certificate formats like RSA, X509, PCKS12 etc. We will look how to read these certificate formats with OpenSSL. Read RSA Private Key RSA is popular format use to create asymmetric key pairs those named public and private key. We can use rsa verb to … Read more
OpenSSL provides different features and tools for SSL/TLS related operations. s_lient is a tool used to connect, check, list HTTPS, TLS/SSL related information. Simply we can check remote TLS/SSL connection with s_client . In these tutorials, we will look at different use cases of s_client . Check TLS/SSL Of Website The basic and most popular use … Read more