Port 3517IEEE 802.11 Inter-Access Point Protocol (IAPP)

Inter-access-point signaling for coordinating roaming and context transfer between IEEE 802.11 wireless access points.

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

also known as 802-11-iapp, IAPP, 802.11f

Technical Details

what runs on :3517

IAPP, associated with IEEE 802.11f, is registered on both TCP and UDP port 3517. Access points use it for inter-AP control exchanges such as announcements and roaming-related context transfer; UDP is used for announcement-style traffic and TCP for reliable exchanges. The protocol is an infrastructure control protocol and is separate from the client WLAN authentication and data-plane protocols.

Security Information

exposure of :3517

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 3.1 across 940 ports — this one sits 1.1 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

Port 3517 should normally be reachable only between trusted access points on a management or infrastructure network, not from the public Internet. IAPP is not an Internet-facing encrypted application protocol by default, so unauthorized access could expose or interfere with WLAN roaming control; its rarity and specialized deployment make opportunistic Internet attacks unlikely.

Record

iana registry entry

port: :3517
service: IEEE 802.11 Inter-Access Point Protocol (IAPP)
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: This port carries IAPP traffic between wireless access points, supporting AP discovery, roaming coordination, and transfer of station context. It is encountered inside WLAN infrastructure rather than as a client-facing or Internet service.
lookups: 0rank 994
added: 2026-09-04
updated: 2026-09-04
references: IANA service name registry — port 3517

Something wrong?

This record is maintained by the engineers who use port 3517. 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 2026-09-04.

01edit any field on a page of its own
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edit this record →back to the registry

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all 940 in network services →

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :3517IEEE 802.11 Inter-Access Point Protocol (IAPP)

Technical Details

Security Information

Related Ports

Port 3517IEEE 802.11 Inter-Access Point Protocol (IAPP)