Top 20 and 200 most scanned ports in the cybersecurity
Port Transport Protocol; 100 : 101: TCP: HOSTNAME.: 102: TCP: TP0 over TCP.: 103: TCP, UDP: Genesis Point-to-Point Trans Net. 104 : ACR-NEMA Digital Imag. & Comm. 300 GRC | Port Authority, for Internet Port 20 The connection with the FTP server's port 20 is the second connection created during an FTP session, the first one being to the server's port 21. See the brief discussion below for additional information, and the detailed information on the port 21 page for much more. Related Ports: 21: The Windows 2012 DNS Server must be configured to prohibit Jun 30, 2016
Popular network services such as DHCP (67/68), SNMP (161,162), DNS (53) or Xbox Live service (88) run on UDP ports; therefore, a UDP scan is another layer to consider when performing any port scan audit. If you are using Nmap as your port scanner, the UDP scan can be performed by adding the …
Nov 25, 2016 Required ports to communicate with Domain controller. Jul 21, 2011 What is UDP port 389 used for?
DNS has always been designed to use both UDP and TCP port 53 from the start 1, with UDP being the default, and fall back to using TCP when it is unable to communicate on UDP, typically when the packet size is too large to push through in a single UDP packet. When Does DNS Switch to TCP?
If the server machine accepts connections on a port from the outside world, and if a firewall is not protecting the port, you can connect to the port from anywhere on the Internet and use the service. Note that there is nothing that forces, for example, a Web server to be on port 80. Well known SCTP, TCP and UDP ports, 0 through 999 Port Transport Protocol; 100 : 101: TCP: HOSTNAME.: 102: TCP: TP0 over TCP.: 103: TCP, UDP: Genesis Point-to-Point Trans Net. 104 : ACR-NEMA Digital Imag. & Comm. 300 GRC | Port Authority, for Internet Port 20 The connection with the FTP server's port 20 is the second connection created during an FTP session, the first one being to the server's port 21. See the brief discussion below for additional information, and the detailed information on the port 21 page for much more. Related Ports: 21: The Windows 2012 DNS Server must be configured to prohibit