Is port 138 (NetBIOS Datagram) dangerous?

Port 138 is classified as high risk. It is a common target for automated scanning and brute-force attacks. Restrict access to trusted IPs if exposure is necessary.

Should port 138 be open on my firewall?

Port 138 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 138 use?

Port 138 (NetBIOS Datagram) uses the UDP transport protocol and falls under the System & Infrastructure category.

:138 (UDP)

NetBIOS Datagram

High Risiko

UDP — System & Infrastructure

On this page

Ikhtisar Port

Nomor Port 138

Nama Layanan NetBIOS Datagram

Protokol Transport UDP

Kategori System & Infrastructure

Risiko Keamanan High

Rentang Port Well-Known (0-1023)

Apa itu Port 138?

NetBIOS Datagram Service. Provides connectionless messaging between NetBIOS hosts for browsing, announcements, and other lightweight network operations.

UDP System & Infrastructure Umum Digunakan

Pertimbangan Keamanan

Port 138 (NetBIOS Datagram) diklasifikasikan sebagai risiko tinggi. Port ini adalah target umum untuk pemindaian otomatis dan serangan brute-force. Jika harus diekspos, batasi akses ke alamat IP yang diketahui.

Rekomendasi: Gunakan aturan firewall untuk memasukkan IP tepercaya ke whitelist. Aktifkan pembatasan kecepatan dan deteksi intrusi.

NetBIOS Datagram

Ikhtisar Port

Apa itu Port 138?

Pertimbangan Keamanan

Port Terkait — System & Infrastructure

Istilah Terkait