NW Kings

DECEMBER 10, 2024

Here are some TCP ports and their associated services- Port 21 : FTP (File Transfer Protocol) used for transferring files between client and server. Port 23 : Telnet provides a command-line interface for remote administration of devices. Port 25 : SMTP (Simple Mail Transfer Protocol) used for sending emails.

UDP port 40

UDP port Port TCP IP Address 40

Kentik

MAY 2, 2018

During last week’s attack, the attacker was redirecting traffic that belonged to Amazon’s Route 53 DNS servers. Below is a diagram of how this attack worked: Once the attackers have the DNS requests coming to them, they can respond with the IP address of a server they control.

IP Address 49

IP Address DNS UDP port Advertising 49

Kentik

JANUARY 11, 2016

To see that, we go back to the Metrics menu and choose Destination » Port. So now we can see that the UDP traffic is being sent to multiple ports, and it’s obvious that we’re experiencing a DNS redirection/amplification attack occurring on port 53, with a lot of port 0 UDP packet fragments being generated as collateral traffic.

Port 40

Port Networking Network UDP port 40