Port 4535Event Heap Server

Event Heap Server provides tuple-based event exchange for distributed interactive applications and workspaces.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as ehs

Technical Details

what runs on :4535

The service provides a shared event space: clients publish events and can retrieve or wait for events matching a template, enabling loosely coupled applications to communicate. IANA lists both TCP and UDP on port 4535. Event Heap is a specialized middleware protocol, not a generally standardized wire protocol; public documentation does not establish a universal handshake or framing format, so those details can depend on the implementation.

Security Information

exposure of :4535

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

network services averages 2.6 across 1,548 ports — this one sits 1.6 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

This service is rarely encountered on public networks, and internet-wide scan data has not observed it open. If deployed, keep it on a trusted application network: event data may be exposed or manipulated by clients able to reach the server, and encryption or authentication should not be assumed from the port assignment.

Record

iana registry entry

port: :4535
service: Event Heap Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Network Services System
usage: Event Heap is middleware associated with interactive-workspace systems, where applications exchange events through a shared tuple-space-style service. It is a specialized deployment rather than a commonly encountered internet-facing service.
lookups: 0rank 993
added: 2026-10-05
updated: 2026-10-05
references: IANA service name registry — port 4535

Something wrong?

This record is maintained by the engineers who use port 4535. 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 2026-10-05.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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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 :4535Event Heap Server

Technical Details

Security Information

Related Ports

Port 4535Event Heap Server