Port Database Search For TCP/UDP Port 21.
This information applies to communications on any TCP/IP network, whether wireless or wired, Most (but not all) warnings are specific to Microsoft Windows based computers.
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Searching for results relating to TCP/UDP port 21
Results for TCP/UDP Port 21 that DO NOT carry warning's
Note, Without looking at the data being sent to or from the service using TCP/UDP port 21 it will not be possible to identify it. Even if only one port association is shown here, it is possible that other services are using the port in question.
| Port | Type | Description | Comment |
|---|---|---|---|
| 21 | tcp | IANA Assigned common port | Nothing Noted |
| 21 | tcp | AudioGalaxy | AudioGalaxy file sharing app |
| 21 | tcp | ftp | File Transfer [Control] |
| 21 | udp | ftp | File Transfer [Control] |
Results for TCP/UDP Port 21 that DO carry warning's
Note, Without looking at the data being sent to or from the service using TCP/UDP port 21 it will not be possible to identify it. Even if only one port association is shown here, it is possible that other services are using the port in question.
| Port | Type | Description | Comment |
|---|---|---|---|
| 21 | tcp | NetAdministrator | WARNING This port may be associated with a trojan; Net Administrator |
| 21 | tcp | BackConstruction | WARNING This port may be associated with a trojan; Back Construction |
| 21 | tcp | RTB666 | WARNING This port may be associated with a trojan; RTB 666 |
| 21 | tcp | TheFlu | WARNING This port may be associated with a trojan; The Flu |
| 21 | tcp | DarkFTP | WARNING This port may be associated with a trojan; Dark FTP |
| 21 | tcp | Fore | WARNING This port may be associated with a trojan; Fore |
| 21 | tcp | MotIvFTP | WARNING This port may be associated with a trojan; MotIv FTP |
| 21 | tcp | Juggernaut42 | WARNING This port may be associated with a trojan; Juggernaut 42 |
| 21 | tcp | Larva | WARNING This port may be associated with a trojan; Larva |
| 21 | tcp | FreddyK | WARNING This port may be associated with a trojan; FreddyK |
| 21 | tcp | DolyTrojan | WARNING This port may be associated with a trojan; Doly Trojan |
| 21 | tcp | InvisibleFTP | WARNING This port may be associated with a trojan; Invisible FTP |
| 21 | tcp | SennaSpyFTPserver | WARNING This port may be associated with a trojan; Senna Spy FTP server |
| 21 | tcp | CCInvader | WARNING This port may be associated with a trojan; CC Invader |
| 21 | tcp | WebEx | WARNING This port may be associated with a trojan; WebEx |
| 21 | tcp | WinCrash | WARNING This port may be associated with a trojan; WinCrash |
| 21 | tcp | BladeRunner | WARNING This port may be associated with a trojan; BladeRunner |
| 21 | tcp | Traitor21 | WARNING This port may be associated with a trojan; Traitor 21 |
| 21 | tcp | Ramen | WARNING This port may be associated with a trojan; Ramen |
| 21 | tcp | CattivikFTPServer | WARNING This port may be associated with a trojan; Cattivik FTP Server |
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