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Port 4672eMule UDP Port

Port 4672 is commonly associated with eMule peer-to-peer (P2P) file-sharing traffic, particularly using the UDP protocol for network communication purposes such as server discovery, peer discovery, and control messages within the eDonkey network. Although primarily unofficial, it has become a de facto standard port for many eMule users to facilitate smoother operation and better connectivity across firewalls and NAT devices..

inFile Transfer
transport
udp

single transport

in transit
cleartext

payload readable on path

assignment
unofficial

used by convention

risk
4/10

caution

lookups
5,127

rank 909 of 993 · top 92%

Technical Details

what runs on :4672

Port 4672 is widely utilized by eMule, a popular open-source P2P file-sharing application compatible with the eDonkey2000 network. eMule leverages this UDP port to handle auxiliary communication that complements its primary TCP-based file transfers. This includes tasks such as finding new peers, maintaining Kad distributed hash tables (DHT), and transmitting control signals like queue requests.

Specifically, UDP on port 4672 is crucial for firewall/NAT traversal, as it allows eMule clients to maintain connectivity even when direct inbound TCP connections are blocked. It supports Kad network functionality, where nodes exchange routing information efficiently via UDP packets, helping to decentralize search and improve resilience of the network.

While eMule can be configured to use custom ports, port 4672 has become a widely accepted default for these UDP-based operations, making it easier for users and network administrators to identify and potentially manage eMule traffic within their networks.

Security Information

exposure of :4672

risk score

4/ 10caution

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

file transfer averages 4.1 across 114 ports — this one sits 0.1 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

unofficial

used by convention, not registered — what answers here varies by deployment

reachable over

udp

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

security overview

Common Vulnerabilities:

  • Due to the nature of P2P file-sharing, this port may be exploited by malicious actors to distribute malware disguised as legitimate files.
  • UDP’s connectionless protocol inherently lacks authentication or integrity assurance, making it susceptible to spoofing, reflection, or amplification attacks.
  • Using an unofficial and commonly-known port exposes hosts to scanning and eavesdropping, which may lead to information disclosure or unauthorized access.

Mitigations:

  • Enforce strict ingress and egress filtering on UDP port 4672 if eMule is not authorized on the network.
  • Implement comprehensive anti-malware measures on endpoints using eMule.
  • Encourage eMule users to enable encryption features within the client.
  • Regularly audit network traffic for abnormal activity associated with this port and consider deep packet inspection to better characterize allowed versus unauthorized usage.

Related Ports

all 114 in file transfer →

the 8 most looked-up other ports in file transfer — 114 ports carry that label.

portservicerisk
:9080Groove RPCcaution
:17500Dropbox LAN Synccaution
:548Apple Filing Protocolcaution
:7000Vuze HTTPS Trackercaution
:1337PowerFolder P2Pcaution
:9001SharePoint Authoringcaution
:8080FilePhile Relaycaution
:1337WASTE Encrypted Sharingcaution

risk mix of the 8 listed

  • caution100%

1 of 8 encrypted