2 ways to check DNS SPF Record with Examples
An SPF (Sender Policy Framework) record is a type of TXT record in our DNS zone file. SPF records help…
Understanding HTTPS Default Port number 443 with Examples
HTTPS is secure and is on port 443. Information that travels on port 443 is encrypted using Secure Sockets Layer…
How DNS MX lookup Works?
MX Lookup means to perform the MX Record Lookup in the DNS. It is used to check the MX Record…
How TCP connection works
This post describes how to see TCP connection establishment and termination as packets using tcpdump on linux. Preparing Install the…
6 Useful Tcp Port Numbers in Linux
In networking, a port is a virtual place on a machine that is open to connections from other machines. Every…
3 Ways to Check DNS Propagation time
DNS propagation is the time for DNS record updates to take effect on all servers. DNS Changes are not instant…
CrazyGames – An Amazing Free Online Game Website
CrazyGames is a free online games website with more than 10 million active users monthly. The company was founded in…
2 Ways to Perform Reverse DNS lookups in Linux
When troubleshooting a Linux server, you often start with an IP address rather than a hostname. For example, you may…
2 ways to check DNS PTR Record in Linux
Introduction A PTR (Pointer) record is the backbone of reverse DNS lookups. While a normal DNS lookup (an A or…
5 Useful Tips to Check DNS MX Record in Linux
DNS MX record is short for mail exchange. It is used to direct email to a mail server. The MX…