
APPENDIX D: Port Number Assignments
The MegaPower CPU IP port source and destination port numbers must be programmed; otherwise, communication with external devices will not occur.
| 
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 | MPCPU | PC | 
 | 
| Purpose | Protocol | Port | Port | Description | 
| Activity | TCP(3) | 514 | Any | Used as a server to listen for requests asking to initiate | 
| Logging(1) | 
 | 
 | 
 | activity logging. These requests are normally sent from the | 
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 | activity logging client. Once a request is received and the | 
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 | connection is established, the port is used as the source for | 
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 | sending the activity logging data. | 
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| EASY CPU(1) | UDP(4) | 4001 | Any | Used to communicate (to the EASY CPU or any other such | 
| 
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 | 
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 | program) all available status or information data. This port | 
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 | 
 | 
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 | works as a server where each received request produces | 
| 
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 | one or more replies to the requesting client (usually to the | 
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 | EASY CPU). | 
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| Snapshot(1) | UDP(4) | Any | 69 | Used for sending JPEG images taken from a camera. Uses | 
| 
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 | TFTP (Trivial File Transfer Protocol) for image transfer. | 
| 
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 | 
| Setting Time/ | UDP(4) | 69 | Any | Used to set or retrieve MPCPU calendar time. Uses TFTP | 
| Firmware | 
 | 
 | 
 | (Trivial File Transfer Protocol) for the calendar time data | 
| Upgrade(1) | 
 | 
 | 
 | transfer. | 
| NTP(2) | UDP(4) | 123 | 123 | NTP (Network Time Protocol) provides time synch between | 
| 
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 | the MPCPU and network systems. | 
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| Alarm Email(2) | TCP(3) | Any | 25 | This port of the server to which the MPCPU sends Email | 
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 | messages in response to an alarm. | 
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| IP Address | UDP(4) | 68 | 67 | Port 68 (source) assigns the IP address and is used for | 
| Assignment(2) | 
 | 
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 | DHCP when enabled. Port 67 Bootstrap Protocol Server | 
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 | (destination) is the listening port on boot and DHCP | 
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 | servers. Clients broadcast to this port for boot or network | 
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 | parameters. | 
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| Notes: | 
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(1)MPCPU specific
(2)Network specified
(3)TCP (Transmission Control Protocol)
(4)UDP (User Datagram Protocol).
MEGAPOWER CPU ADMINISTRATOR’S GUIDE
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