Is port 20 (FTP Data) dangerous?

Port 20 is classified as critical risk and should not be exposed to the public internet. It transmits data without encryption, making it vulnerable to eavesdropping and credential theft.

Should port 20 be open on my firewall?

No, port 20 should not be open to the public internet. Block it at the firewall and use encrypted alternatives such as SSH, SFTP, or HTTPS instead.

What transport protocol does port 20 use?

Port 20 (FTP Data) uses the TCP transport protocol and falls under the File Transfer category.

:20 (TCP)

FTP Data

Critical Risiko

TCP — File Transfer

On this page

Ikhtisar Port

Nomor Port 20

Nama Layanan FTP Data

Protokol Transport TCP

Kategori File Transfer

Risiko Keamanan Critical

Rentang Port Well-Known (0-1023)

Apa itu Port 20?

FTP data transfer channel. Used in active mode FTP for the server to establish a data connection back to the client. Credentials and files are sent in plaintext.

TCP File Transfer Umum Digunakan

Pertimbangan Keamanan

Port 20 (FTP Data) diklasifikasikan sebagai risiko kritis. Port ini tidak boleh diekspos ke internet publik. Layanan ini mentransmisikan data tanpa enkripsi, sehingga rentan terhadap penyadapan, pencurian kredensial, dan serangan man-in-the-middle.

Rekomendasi: Blokir port ini di firewall. Gunakan alternatif terenkripsi (SSH, SFTP, HTTPS) sebagai gantinya.

FTP Data

Ikhtisar Port

Apa itu Port 20?

Pertimbangan Keamanan

Protokol Terkait

Port Terkait — File Transfer

Istilah Terkait