Is port 111 (RPCBind / Portmapper) dangerous?

Port 111 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 111 be open on my firewall?

No, port 111 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 111 use?

Port 111 (RPCBind / Portmapper) uses the TCP/UDP transport protocol and falls under the System & Infrastructure category.

:111 (TCP/UDP)

RPCBind / Portmapper

Critical Risiko

TCP/UDP — System & Infrastructure

Ikhtisar Port

Nomor Port 111

Nama Layanan RPCBind / Portmapper

Protokol Transport TCP/UDP

Kategori System & Infrastructure

Risiko Keamanan Critical

Rentang Port Well-Known (0-1023)

Apa itu Port 111?

RPCBind (also called portmapper) maps ONC RPC program numbers to the dynamic ports on which those services are listening. Exposing port 111 on the internet is a well-known critical vulnerability.

TCP/UDP System & Infrastructure Umum Digunakan

Pertimbangan Keamanan

Port 111 (RPCBind / Portmapper) 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.

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