Is port 391 (SynOptics-SNMP) dangerous?

Port 391 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 391 be open on my firewall?

Port 391 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 391 use?

Port 391 (SynOptics-SNMP) uses the TCP/UDP transport protocol and falls under the System & Infrastructure category.

:391 (TCP/UDP)

SynOptics-SNMP

Low Risiko

TCP/UDP — System & Infrastructure

Ikhtisar Port

Nomor Port 391

Nama Layanan SynOptics-SNMP

Protokol Transport TCP/UDP

Kategori System & Infrastructure

Risiko Keamanan Low

Rentang Port Well-Known (0-1023)

Apa itu Port 391?

SynOptics SNMP Relay. SNMP relay protocol for SynOptics (now Nortel/Extreme) network management.

TCP/UDP System & Infrastructure

Pertimbangan Keamanan

Port 391 (SynOptics-SNMP) 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 — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Istilah Terkait

Bandwidth Latency Packet Loss Ping Throughput ASN