| Message Code | PIX-4-500004 |
| Severity | Warning |
| Description | Invalid transport field for protocol=protocol, from source_address/source_port to dest_address/dest_port |
| Explanation | This message appears when there is an invalid transport number, in which the source or destination port number for a protocol is zero. The protocol value is 6 for TCP and 17 for UDP. |
| User Action | If these messages persist, contact the peer's administrator. |
| Reference Links |
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