Port 8433Amazon AppStream 2.0 streaming

UDP port 8433 carries Amazon AppStream 2.0 desktop and application streaming traffic.

transport: udp
in transit: encrypted
assignment: official
risk: 3/10
lookups: 0

also known as aws-as2

Technical Details

what runs on :8433

UDP 8433 carries AppStream 2.0 session-streaming traffic between the client and the streaming service; it is not a general-purpose UDP service or a standalone login endpoint. Session setup and authentication involve AppStream's service infrastructure, while this port carries the interactive stream. The wire protocol and datagram framing are proprietary rather than a publicly specified, general-purpose protocol; the streaming channel is encrypted in normal AppStream use.

Security Information

exposure of :8433

risk score

3/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

streaming averages 3.1 across 52 ports — this one sits 0.1 below.

in transit

encrypted

payloads are protected on the wire

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

This port is relevant when AppStream 2.0 streaming is in use, not as a general remote-desktop listener. Keep access limited to the required AppStream traffic and avoid exposing unrelated hosts or services on it; an unexpected listener warrants investigation. The encrypted session does not remove the risks of unauthorized access to an AppStream account or abuse of an exposed service.

Record

iana registry entry

port: :8433
service: Amazon AppStream 2.0 streaming
transport: UDP
encryption: tls / encrypted
assignment: iana registered
risk: 3/10caution
category: Streaming Cloud
usage: This port is used for UDP-based streaming in Amazon AppStream 2.0, where users access hosted desktops and applications. Engineers are most likely to encounter it in AppStream fleet networking or when reviewing traffic from an AppStream client session.
lookups: 0rank 993
added: 2026-10-14
updated: 2026-10-14
references: IANA service name registry — port 8433

Something wrong?

This record is maintained by the engineers who use port 8433. 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 2026-10-14.

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edit this record →back to the registry

Related Ports

all 52 in streaming →

the 8 most looked-up other ports in streaming — 52 ports carry that label.

port	service	proto	category	risk	views
:8888	GNUmp3d Streaming HTTP	TCP	Web Services	caution	76.3k
:8000	Alternate HTTP / SHOUTcast	TCP	Web Services	caution	45.0k
:8880	Windows Media SOAP Connector	TCP	Streaming	caution	24.3k
:5001	Slingbox	TCP	Streaming	caution	22.4k
:1220	QTSS Admin	TCP	Streaming	safe	20.6k
:19294	Google Talk Voice/Video	TCP	Streaming	caution	16.6k
:12013	Audition Korea Server	TCPUDP	Streaming	caution	14.5k
:9000	SqueezeCenter	TCP	Web Services	caution	14.4k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :8433Amazon AppStream 2.0 streaming

Technical Details

Security Information

Related Ports

Port 8433Amazon AppStream 2.0 streaming