Telnet which operates over TCP port 23 is still widely used regardless of the fact that the user credentials are passed over the wire in clear text. Sniffing the traffic can easily show you this. If you are guilty of still using Telnet, you should migrate quickly to SSH and change all of they device Read more about 5 Minutes of Telnet Attacks[…]
As you can see Telnet on TCP port 23 is still the most attacked protocol, probably because it’s weak and sends passwords in clear text…
China and Korea were among the sources of most of the attacks against the USA, targeting the Telnet protocol on TCP port 23.
Earlier this month I saw a lot of attacks targeting Telnet, which I thought was odd. Now because of Microsoft’s Patch Tuesday, I know why that was… This vulnerability (MS15-002) marked as having a critical severity rating is in the Telnet protocol, used to provide terminal connections to remote computers over TCP23. Microsoft marks vulnerabilities as Read more about Telnet Vulnerability[…]