Is port 421 (Ariel2) dangerous?

Port 421 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 421 be open on my firewall?

Port 421 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 421 use?

Port 421 (Ariel2) uses the TCP/UDP transport protocol and falls under the Other category.

:421 (TCP/UDP)

Ariel2

Low Risiko

TCP/UDP — Other

Ikhtisar Port

Nomor Port 421

Nama Layanan Ariel2

Protokol Transport TCP/UDP

Kategori Other

Risiko Keamanan Low

Rentang Port Well-Known (0-1023)

Apa itu Port 421?

Ariel2. Extended protocol for the Ariel interlibrary document delivery system.

TCP/UDP Other

Pertimbangan Keamanan

Port 421 (Ariel2) 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 — Other

35 Private Printer Server 43 WHOIS 63 Whois++ 75 Private Dial-Out Service 78 VetTCP 91 MIT-DOV 92 NPP 104 DICOM

Istilah Terkait

ASN BGP Hijack Data Center Domain Name Dual Stack Internet Exchange Point (IXP)