Port 5357WSDAPI
**Web Services for Devices API (WSDAPI)** enables automatic discovery and communication between connected devices in a network, streamlining device management and integration on **Windows Vista, Windows 7, and Windows Server 2008** systems. This protocol simplifies the interaction between PCs and network-enabled devices such as printers, scanners, and cameras by utilizing **web service standards** like SOAP to provide plug-and-play functionality..
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- unofficial
- risk
- 4/10
- lookups
- 19,229
2 transports registered
payload readable on path
used by convention
caution
rank 135 of 993 · top 14%
Technical Details
what runs on :5357The Web Services for Devices API (WSDAPI) is a Microsoft implementation conforming to the Devices Profile for Web Services (DPWS) specification. It facilitates seamless communication between client systems and network-connected devices over standard protocols, enabling device discovery, description, control, and eventing across local networks. The protocol operates primarily over TCP and UDP, leveraging SOAP-based messaging and XML for structured data exchanges.
WSDAPI allows Windows-based hosts to discover compatible devices dynamically, often used in a plug-and-play fashion. Upon network connection, a client sends out probe messages to locate services provided by devices. Once discovered, metadata and device capabilities are retrieved using WS-MetadataExchange, and clients can interact with the device functions via standardized SOAP commands. This enhances interoperability without proprietary drivers or manual configuration.
The API is integrated deeply into Windows operating systems starting from Vista, primarily supporting devices like network printers, scanners, and multifunction peripherals. As it employs web service standards, it avoids reliance on legacy protocols such as SNMP or LPR, paving the way for richer capabilities and better management options, as well as easier integration into modern service-oriented network architectures.
Security Information
exposure of :5357risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
web services averages 3.9 across 112 ports — this one sits 0.1 above.
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
tcp · udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities:
- Unauthorized access: Since devices advertise their presence openly, attackers on the same network may identify and interact with exposed services if insufficient access controls are in place.
- Man-in-the-middle attacks: Without encryption, SOAP messages exchanged between devices and hosts can be intercepted and potentially modified.
- Denial of Service (DoS): Malicious actors may flood WSDAPI listeners with probes or malformed requests, overwhelming device or network resources.
Common Mitigations:
- Network segmentation: Restrict WSDAPI-enabled devices to trusted segments separated from untrusted users.
- Access controls: Employ firewalls or Windows Firewall settings to limit which hosts can communicate over port 5357.
- Disable if unnecessary: On systems or environments not using WSDAPI devices, disabling the respective Windows services reduces attack surface.
- Monitoring and logging: Enable network monitoring to detect anomalous device discovery activity.
- Encryption where possible: While WSDAPI is unencrypted by default, incorporate IPsec or network-layer encryption methods to protect traffic against snooping.
Related Ports
the 8 most looked-up other ports in web services — 112 ports carry that label.
| port | service | risk | |||
|---|---|---|---|---|---|
| :8888 | Sun Answerbook & Alt HTTP | TCP | Web Services | caution | 123.9k |
| :8000 | Intel Remote Desktop / Alternate HTTP Port | TCP | Web Services | safe | 84.3k |
| :8888 | NewsEDGE | TCPUDP | Web Services | caution | 83.3k |
| :8888 | HTTP Alternative Port | TCP | Web Services | caution | 76.5k |
| :8888 | GNUmp3d Streaming HTTP | TCP | Web Services | caution | 76.3k |
| :9080 | Groove RPC | TCPUDP | Web Services | caution | 70.8k |
| :8881 | Atlasz Secure Server | TCP | Web Services | caution | 67.6k |
| :80 | HTTP | TCPUDP | Web Services | caution | 67.3k |
risk mix of the 8 listed
- safe13%
- caution88%
0 of 8 encrypted