Is port 991 (NAS) dangerous?

Port 991 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 991 be open on my firewall?

Port 991 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 991 use?

Port 991 (NAS) uses the TCP/UDP transport protocol and falls under the Other category.

:991 (TCP/UDP)

NAS

Low Risiko

TCP/UDP — Other

On this page

Ikhtisar Port

Nomor Port 991

Nama Layanan NAS

Protokol Transport TCP/UDP

Kategori Other

Risiko Keamanan Low

Rentang Port Well-Known (0-1023)

Apa itu Port 991?

Netnews Administration System (NAS), defined in RFC 4707, for centralized management of NNTP news server configurations. Usenet has significantly declined.

TCP/UDP Other

Pertimbangan Keamanan

Port 991 (NAS) 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.

NAS

Ikhtisar Port

Apa itu Port 991?

Pertimbangan Keamanan

Port Terkait — Other

Istilah Terkait