Port 2540LonWorks (LonTalk)
LonWorks is a building-automation control protocol used by LonTalk devices and gateways.
- transport
- tcp · udp
- in transit
- cleartext
- assignment
- official
- risk
- 2/10
- lookups
- 0
2 transports registered
payload readable on path
registered with iana
safe
rank 993 of 4,118 · top 24%
Technical Details
what runs on :2540LonWorks uses the LonTalk protocol, standardized as ANSI/CEA-709.1, for control and data exchange among devices over different network media. IANA assigns both TCP and UDP port 2540, but the assignment alone does not establish a universal handshake, framing, or default endpoint behavior: IP connectivity depends on the device or gateway implementation. Treat an open port as a possible LonWorks endpoint, not proof of a particular product or deployment.
Security Information
exposure of :2540risk score
2/ 10safe
routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.
network services averages 2.7 across 1,313 ports — this one sits 0.7 below.
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
LonWorks devices can participate in building or industrial control, so an exposed endpoint may provide access to operational systems. Keep it off the public internet and restrict access to trusted networks; encryption and other protections depend on the deployment and should not be assumed.
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risk mix of the 8 listed
- caution100%
0 of 8 encrypted