Port 854Dynamic Link Exchange Protocol (DLEP)

DLEP lets routers exchange link status and metrics with attached modems or radio devices.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as dlep

Technical Details

what runs on :854

DLEP uses UDP for peer discovery and TCP for the established router-to-modem control session, with port 854 assigned for both transports. After discovery, the peers establish a TCP session and exchange typed messages containing type-length-value elements for session initialization, peer announcements, link metrics, and state changes. DLEP itself does not provide application payload transport; it exchanges information used by routing systems over specialized links.

Security Information

exposure of :854

risk 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 1,192 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

DLEP is not encrypted by default and the base protocol does not provide strong authentication or integrity protection. An exposed endpoint could allow session disruption or injection of false peer and link metrics, potentially influencing routing; it should normally be restricted to the router's directly connected modem or radio network rather than exposed to the Internet.

Record

iana registry entry

port: :854
service: Dynamic Link Exchange Protocol (DLEP)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: DLEP runs between a router and a modem or radio, allowing the device to report peer availability, link metrics, and session changes. Engineers usually encounter it in tactical, mobile, mesh, or other specialized radio-network deployments rather than on general-purpose Internet hosts.
lookups: 0rank 994
added: 2026-09-15
updated: 2026-09-15
references: IANA service name registry — port 854
RFC 8175

Something wrong?

This record is maintained by the engineers who use port 854. 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 2026-09-15.

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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :854Dynamic Link Exchange Protocol (DLEP)

Technical Details

Security Information

Related Ports

Port 854Dynamic Link Exchange Protocol (DLEP)