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Port 5900
Link Logger for Windows
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Link Logger for Windows

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TCP Port 5900

Common Use

Virtual Network Computer (VNC).

Inbound Scan

Currently inbound scans are likely looking for either VNC computers with weak password or trying to exploit buffer oveflow vulnerability within UltraVNC ( ) or a vulnerability where RealVNC Server fails to properly authenticate clients ( ).

Outbound Scan

Outbound scans if occurring in volume should be considered an indication of a possible worm infection on the source computer and should be investigated or a remote connection to a VNC enabled system.

Additional Information

Page last updated on November 29, 2008