Is port 209 (QMTP) dangerous?

Port 209 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 209 be open on my firewall?

Port 209 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 209 use?

Port 209 (QMTP) uses the TCP transport protocol and falls under the Email category.

:209 (TCP)

QMTP

Low Risiko

TCP — Email

On this page

Ikhtisar Port

Nomor Port 209

Nama Layanan QMTP

Protokol Transport TCP

Kategori Email

Risiko Keamanan Low

Rentang Port Well-Known (0-1023)

Apa itu Port 209?

QMTP (Quick Mail Transfer Protocol) is a replacement for SMTP designed for high-performance mail transfer between cooperating mail servers. Designed by Dan Bernstein. Very limited adoption.

TCP Email

Pertimbangan Keamanan

Port 209 (QMTP) 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.

QMTP

Ikhtisar Port

Apa itu Port 209?

Pertimbangan Keamanan

Port Terkait — Email

Istilah Terkait