Port 4672Remote File Access

Port 4672 is assigned to remote file access server traffic over TCP and UDP.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 5/10
lookups: 0

also known as rfa

1 other service is registered on port 4672. compare all 2 →

Technical Details

what runs on :4672

The registered service covers both TCP and UDP, but eMule/eDonkey deployments conventionally use UDP 4672 for peer and server queries, source exchange, and Kad-related traffic; the corresponding default client TCP port is commonly 4662. There is no universal handshake or framing for every listener on this port: eMule uses its own binary UDP message formats, while other software may implement the unassociated remote-file-access assignment. Traffic is normally unencrypted.

Security Information

exposure of :4672

risk score

5/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

file transfer averages 3.5 across 168 ports — this one sits 1.5 above.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

An exposed eMule-compatible listener can reveal peer and file-sharing activity and receive unsolicited peer-to-peer traffic, while cleartext protocol data may be inspected or abused for traffic amplification or unwanted content exchange. It should not be exposed to the Internet unless peer-to-peer file sharing is intended; restrict it with firewall rules and verify which process owns the socket.

Record

iana registry entry

port: :4672
service: Remote File Access
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 5/10caution
category: File Transfer Remote Access
usage: Port 4672 is most commonly encountered as the UDP port used by eMule, eDonkey, and compatible peer-to-peer file-sharing clients. The IANA assignment calls it a remote file access server, but no registrant or single standardized implementation is recorded.
lookups: 0rank 993
added: 2026-08-20
updated: 2026-09-22
references: IANA service name registry — port 4672

Something wrong?

This record is maintained by the engineers who use port 4672. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-22.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 168 in file transfer →

the 8 most looked-up other ports in file transfer — 168 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:17500	Dropbox LAN Sync	TCPUDP	File Transfer	caution	43.7k
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:8080	FilePhile Relay	UDP	File Transfer	caution	25.6k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :4672Remote File Access

Technical Details

Security Information

Related Ports

Port 4672Remote File Access