Port 1645 is used for Remote Authentication Dial-In User Service (RADIUS) authentication protocol. It is primarily used for communication between the RADIUS client and server in order to authenticate and authorize users on a network.
Ports those registered with IANA are shown as official ports. The same port number may be unofficialy used by various services or applications. The official usage are listed separately below its usage may change from time to time.
Official
Port |
Protocol (TCP/UDP) |
Title |
Description |
Port Type |
Port 1645 |
tcp |
sightline |
SightLine |
REGISTERED PORT |
Port 1645 |
udp |
sightline |
SightLine |
REGISTERED PORT |
UnOfficial
Unofficialy or sometimes with conflict, the same port may be used by different applications.
Port | Protocol (TCP/UDP) | Description |
Port 1645 | radius auth, RADIUS authentication protocol (default for Cisco and Juniper Networks RADIUS servers) |