Flamingo Blog.

What a trojan virus is and why it is not technically a virus, how trojans reach work machines through fake installers, cracked software, email and ClickFix fake CAPTCHAs, the main types, what EDR sees when one runs, and what staff and techs should do after a click.

What destination host unreachable means, how to read the Reply from address to tell a local ARP failure from a router or firewall problem, and a fix order that gets from ping to root cause.

Stateful vs stateless explained for IT pros: how stateful firewalls track connections in a state table, why stateless ACLs and AWS network ACLs need return rules, idle timeouts and asymmetric routing, and what makes an application or HTTP session stateless.

What a cipher is, how it differs from a code and from encryption, symmetric vs asymmetric and block vs stream ciphers, how to read a TLS cipher suite name, which weak ciphers to disable (TLS 1.0/1.1, RC4, 3DES) on Windows, Linux and appliances, and how to test.