TCP 5100
Synopsis
- SirsiDynix Horizon (Integrated Library System): its SIP2 (3M Standard Interchange Protocol) service for self-check kiosks/RFID gates commonly listens on TCP port 5100; vendors like Bibliotheca (3M) and EnvisionWare connect to Horizon over this port.
- Security note: SIP2 is typically unencrypted and, when port 5100 is exposed to the internet or left with weak credentials, attackers have abused it to enumerate patron records or perform unauthorized transactions; restrict access to trusted subnets/VPN and tunnel/secure it where possible.
Observed activity
Last 30 days
Detailed chart