Tag: https

What Is SSL Certificate CN (Common Name) and Usage?

Posted on 13/12/2018 by İsmail Baydan

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

HTTP Status 503 Error Code and How To Fix It?

Posted on 25/10/2018 by İsmail Baydan

Hypertext Transfer Protocol or HTTP 503 Service Unavaiable server error response code indicates that the server is not ready to handle the request. Also HTTPS protocol will use the same

How To Redirect Http To Https In Apache and Nginx

Posted on 18/05/2018 by İsmail Baydan

Http is popular protocol used to transfer web page data like HTML, Javascript, Image etc. HTTP is used between our browser like Chrome, Firefox, Edge, Internet Explorer and server like

What Is “server_name” in Nginx Web Server Configuration?

Posted on 22/04/201822/04/2018 by İsmail Baydan

Nginx web server provides a lot of different configuration about the web service. Some of the configurations are used very often. server_nameis one of them which can be miss interpreted.

Linux Lftp Client Tutorial For Ftp, Http, Sftp, Https, Ftps, Fish Potocols

Posted on 25/01/2018 by İsmail Baydan

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

Curl Post Data From Terminal with Examples

Posted on 18/09/2017 by İsmail Baydan

curl is useful tool used to create HTTP, HTTPS, FTP, … and similar protocol request from command line. This provides us the ability to simulate web browser behavior or similar application

How To Specify Host, Port and Protocol For Tcpdump?

Posted on 07/09/2017 by İsmail Baydan

Tcpdump is everyday tool used by system and network administrator. We generally look simple use cases like host, port and protocol filter for tcpdump . In this tutorial we will look

How To Read RSA, X509, PKCS12 Certificates with OpenSSL?

Posted on 17/08/201717/08/2017 by İsmail Baydan

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.

How To Use OpenSSL s_client To Check and Verify SSL/TLS Of HTTPS Webserver?

Posted on 16/08/2017 by İsmail Baydan

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

Tcp and Udp Port List, Names and Usage Frequency

Posted on 01/08/201722/04/2018 by İsmail Baydan

Nmap tool provides popular ports list as a database where this list is also used in network and service scans. Here is the list but before we will look the