Port 3363NATI Vi Server

NATI Vi Server uses TCP and UDP port 3363 for a National Instruments service.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 7/10
lookups: 0

Technical Details

what runs on :3363

IANA assigns port 3363 to NATI Vi Server over both TCP and UDP. In normal LabVIEW deployments, VI Server communication primarily uses TCP 3363, with a configurable server port and LabVIEW-specific request and response framing for remote access to VIs, properties, and methods. The service is part of the LabVIEW application environment rather than a general-purpose network protocol, and its availability depends on VI Server being enabled in the LabVIEW or deployed application configuration.

Security Information

exposure of :3363

risk score

7/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

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

VI Server can expose remote control and execution capabilities in LabVIEW applications, so an exposed instance may allow an attacker who passes its configured access controls to inspect or manipulate test, measurement, or automation workloads. It should generally be restricted to trusted management networks or a VPN, with authentication and VI Server access lists enabled; it should not be exposed directly to the public internet.

Record

iana registry entry

port: :3363
service: NATI Vi Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 7/10risk
category: uncategorised
usage: This port is commonly used by National Instruments LabVIEW applications for VI Server access, allowing remote clients to inspect, invoke, and control virtual instruments. Engineers typically encounter it on LabVIEW development systems, test equipment, and industrial automation hosts.
lookups: 0rank 993
added: 2026-09-04
updated: 2026-09-22
references: IANA service name registry — port 3363

Something wrong?

This record is maintained by the engineers who use port 3363. 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 2026-09-22.

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

Related Ports

browse categories →

ports registered around :3363, by lookups.

port	service	proto	category	risk	views
:3386	GTP (GPRS Tunneling Protocol)	TCPUDP	Network Services	caution	16.7k
:3389	Microsoft RDP	TCPUDP	Remote Access	caution	16.3k
:3299	SAP Router	TCPtls	Network Services	caution	13.8k
:3306	MySQL	TCPUDP	Databases	caution	13.6k
:3424	Xware xTrm over SSL	TCPtls	Security	caution	13.1k
:3333	Network Caller ID	TCP	Network Services	caution	10.1k
:3423	Xware xTrm Protocol	TCP	Network Services	caution	8.7k
:3300	Debate Gopher DB	TCPUDP	Databases	caution	7.6k

risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :3363NATI Vi Server

Technical Details

Security Information

Related Ports

Port 3363NATI Vi Server