“Unable to get Local Issuer Certificate” is a common SSL certificate error. It is related to the incomplete certificate chain such as (most commonly) missing the intermediate certificate or missing the root certificate authority (CA) certificate in its trusted certificate…
An epic is often a larger user story that is broken down into smaller stories in order to be worked on. The important thing to note about epics is that they aren’t just an agile tool. Teams of all work…
certificate chain is an ordered list of certificates, containing an SSL/TLS Certificate and Certificate Authority (CA) Certificates, that enable the receiver to verify that the sender and all CA’s are trustworthy. The chain or path begins with the SSL/TLS certificate,…
Let’s dive into the fascinating world of tcpdump! It’s a command-line packet analyzer that allows you to capture and inspect network traffic. Think of it as a microscope for your network. We’ll break down how to use its filtering capabilities…
SSL certificates can have a variety of file extension types. There are a few simple OpenSSL commands that will correctly change the file format easily. We’ll walk you through the process in OpenSSL to convert a certificate to PEM. x.509…
The best way to find files by name in Linux is using the find command with the “-name” option. This command will search through the directories for files that have the specific word in their name. This can be very…
Grep is a Linux / Unix command-line tool used to search for a string of characters in a specified file. When it finds a match, it prints the line with the result. The grep command is handy when searching through…
ICMP type is the first 8 bits in the ICMP message header. It provides a brief explanation of what the message is for so the receiving network device knows why it is getting the message and how to treat it.…
Internet Control Message Protocol (ICMP) is a network layer protocol that serves the purpose of error reporting and network path diagnostic functions. ICMP messages are sent using a basic IP header. The protocol field in IP header will be set…
If you’re a gamer, then you know that a fast and reliable DNS server is essential for an optimal gaming experience. In this blog post, we will discuss the best DNS servers for PS4 PS5 and how to optimize your…
