Remote Access

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A remote desktop (remote control) allows users to access a workplace workstation when at home or vice versa, fix a computer problem remotely, perform administrative tasks easily and accomplish demonstrations of a process or software application. Protocols for remote desktop connectivity include Remote Desktop Protocol, virtual network computing, NX technology and independent computing architecture. In addition, headless computers (without monitor, keyboard or mouse) can easily be remotely accessed by administrators. A remote desktop is used by many computer manufacturers’ tech support personnel to access, diagnose, repair or reconfigure a user’s OS, application or hardware problem.

In a remote desktop setup, the controlling computer receives a copy of the image, updated on a timed interval or when a change is detected by the software, from the controlled computer’s display. The controlling computer’s keyboard and mouse inputs are transferred to the controlled computer, where the remote desktop software implements the instructions. Often, the controlled computer’s keyboard and mouse can be disabled to prevent interference with the remote user’s actions.

Common ports

FTP Control 21
SSH 22
Telnet 23
DNS 53
HTTP / Web 80
POP3 110
IMAP 143
POP3 SSL 995
MSSQL 1433
VNC 5900