Is port 89 (SU/MIT Telnet Gateway) dangerous?

Port 89 is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose with standard security practices.

Should port 89 be open on my firewall?

Port 89 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 89 use?

Port 89 (SU/MIT Telnet Gateway) uses the TCP transport protocol and falls under the Remote Access category.

:89 (TCP)

SU/MIT Telnet Gateway

Low Risiko

TCP — Remote Access

Ikhtisar Port

Nomor Port 89

Nama Layanan SU/MIT Telnet Gateway

Protokol Transport TCP

Kategori Remote Access

Risiko Keamanan Low

Rentang Port Well-Known (0-1023)

Apa itu Port 89?

Port 89 was assigned to the SU/MIT Telnet Gateway, an early ARPANET service that provided mediated Telnet access through a gateway system at MIT and Stanford.

TCP Remote Access

Pertimbangan Keamanan

Port 89 (SU/MIT Telnet Gateway) diklasifikasikan sebagai risiko rendah. Layanan ini menggunakan enkripsi atau memiliki permukaan serangan yang minimal, sehingga relatif aman untuk diekspos.

Rekomendasi: Terapkan praktik keamanan standar. Jaga perangkat lunak tetap diperbarui dan pantau akses.

Port Terkait — Remote Access

22 SSH 23 Telnet 57 Private Terminal Access 95 SUPDUP 107 Remote Telnet 177 XDMCP 219 Uarps 221 FLN-SPX

Istilah Terkait

SSL/TLS Certificate DDoS DNS Spoofing Encryption Firewall HTTPS