The Internet UDP port 999 is not commonly associated with any specific software or system. However, it has been used by the Lantronix UDS-10/UDS100 (Serial Device Server) for its default configuration. Additionally, some instances of malware, such as the "Deep Throat" remote access trojan, have been known to utilize this port. It's important to note that the usage of port 999 can vary greatly depending on the software or system in question.
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