Port 4021

Modified by:

Port 4021 is typically used for File Transfer Protocol (FTP) data transfer. It is commonly used by FTP servers as the default port for data transfers in passive mode.

Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.

Official

Port
Protocol (TCP/UDP)
Title
Description
Port Type
Port 4021
tcp
nexus-portal
Nexus Portal
REGISTERED PORT
Port 4021
udp
nexus-portal
Nexus Portal
REGISTERED PORT

UnOfficial

Unofficialy or sometimes with conflict, the same port may be used by different applications.

Port Protocol (TCP/UDP) Description
TCP UDP Ports
Other ports
Port 2525
Port 2525 is commonly used as an alternative SMTP port. SMTP stands for Simple
Port 2190
Ports those registered with IANA are shown as official ports. The same port number
Port 1785
Port 1785 is typically used for the Grid Analysis and Display System (GRADS) data
Port 4346
Ports those registered with IANA are shown as official ports. The same port number
Port 8471
Ports those registered with IANA are shown as official ports. The same port number
Port 1351
Port 1351 is used by the FileMaker Pro database software for remote clients to
Port 6222
Port 6222 is commonly used for messaging and communication protocols, such as XMPP and
Port 2365
Port 2365 is used for Network Information Service (NIS), which is a distributed directory
Port 171
Port 171 is not assigned to any particular service or application by the Internet
Port 1651
Port 1651 is primarily used for communicating with a software program called “ANSYS Workbench
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