Ports are described by 16 bits. 2^16 is 65536 so the highest number is 65535 and port 65536 does not exist.
TCP ports 139, 445
Conventionally, an HTTP server listens on port 80. Regardless of the brand of web server that you are running, the server will typically listen for HTTP traffic on port 80 and HTTPS traffic on port 443.
69 is the port number of TCP. TCP is the connection reliable protocol which is used to transfer the data in the network.so that dns is not configured properly or tcp/ip settings are not properly.
The SFTP port is used for secure logins, secure file transfer and port forwarding. It can be found on port 22 of the TCP protocol. The name of this port stands for Secure File Transfer Protocol.
**The TCP transport layer protocol uses windowing and acknowledgments for reliable transfer of data. **The TCP and UDP port numbers are used by application layer protocols. **The TCP transport layer protocol provides services to direct the data packets to their destination hosts.
To scan all TCP ports in the range of 1 to 65536, you can use the nmap command with the following syntax: nmap -p 1-65536 <target>. Replace <target> with the IP address or hostname of the target machine. This command will perform a comprehensive scan of all specified TCP ports.
used TCP port 110.
Port 1151 is used for TCP/UDP
2^16=65536
To open a TCP connection, you can use the telnet command followed by the hostname or IP address and the port number. For example, telnet example.com 80 opens a TCP connection to port 80 on example.com. Alternatively, you can use nc (netcat) with a similar syntax, like nc example.com 80. These commands are commonly used for testing connectivity to a specific service.
TCP port 389 is commonly used for Lightweight Directory Access Protocol (LDAP)
To open a port in Windows 7 using the command line, you can use the netsh command. For example, to open port 8080, you would enter the following command: netsh advfirewall firewall add rule name="Open Port 8080" dir=in action=allow protocol=TCP localport=8080. This command creates a new firewall rule that allows inbound traffic on TCP port 8080. Make sure to run the Command Prompt as an administrator for this to work.
The commonly used port for remote access is TCP port 22, which is used by Secure Shell (SSH) for secure command-line access to remote systems. Another frequently utilized port is TCP port 3389, which is used by Remote Desktop Protocol (RDP) for graphical remote access to Windows machines. It's important to secure these ports to prevent unauthorized access and potential attacks.
TCP Port 88
TCP ports 139, 445
FTP (File Transfer Protocol) uses two TCP ports: port 21 and port 20. Port 21 is used for command control, where commands and responses are exchanged between the client and server. Port 20 is used for data transfer in active mode, where the server connects to the client to send the requested data. In passive mode, data is transferred over a dynamically assigned port above 1024.
An SMTP port is the port used to transfer email using the SMTP protocol. Typically SMTP is configured to use TCP port 25, although some servers will use TCP port 587.