| Port No | 95 |
| Service Name | supdup |
| RFC Doc | 734 |
| Protocol | TCP |
| Description | (TCP) supdup, and old UNIX subsystem sometimes scanned by hackers. SUPDUP was an extension to Telnet for out-of-band graphics control items. Cisco may use this port for their own purposes. |
| Reference Link | SUPDUP Protocol: RFC734 Telnet SUPDUP option: RFC736 |
| Attack |
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