Is port 203 (AT-3) dangerous?

Port 203 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 203 be open on my firewall?

Port 203 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 203 use?

Port 203 (AT-3) uses the TCP/UDP transport protocol and falls under the System & Infrastructure category.

:203 (TCP/UDP)

AT-3

Low Risiko

TCP/UDP — System & Infrastructure

On this page

Ikhtisar Port

Nomor Port 203

Nama Layanan AT-3

Protokol Transport TCP/UDP

Kategori System & Infrastructure

Risiko Keamanan Low

Rentang Port Well-Known (0-1023)

Apa itu Port 203?

AppleTalk Unused. Reserved for the AppleTalk protocol suite but not assigned to any specific AppleTalk service.

TCP/UDP System & Infrastructure

Pertimbangan Keamanan

Port 203 (AT-3) 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.

AT-3

Ikhtisar Port

Apa itu Port 203?

Pertimbangan Keamanan

Port Terkait — System & Infrastructure

Istilah Terkait