Port 3817Yosemite Tech Tapeware

Port 3817 is assigned to Yosemite Tech Tapeware, a service registered by Luke Dion.

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

Technical Details

what runs on :3817

Yosemite Tech Tapeware is registered on port :3817 over tcp and udp to Luke Dion, assigned April 2004. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :3817

this machine

# linux
sudo ss -tulpn 'sport = :3817'

# macos / bsd
sudo lsof -nP -i :3817

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3817

another host

nmap -sV -p T:3817 <host>
sudo nmap -sU -sV -p U:3817 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :3817

risk score

1/ 10safe

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

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

no security notes recorded for :3817 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :3817
service: Yosemite Tech Tapeware
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: TCP and UDP port 3817 is assigned to Yosemite Tech Tapeware, associated with a registration by Luke Dion. Public protocol behavior and deployment context are not documented in the registry; engineers are likely to encounter it only in environments using that product.
lookups: 0rank 993
added: 2026-09-13
updated: 2026-09-13
references: IANA service name registry — port 3817

Something wrong?

This record is maintained by the engineers who use port 3817. 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 2026-09-13.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :3817, by lookups.

port	service	proto	category	risk	views
:3872	Oracle Management Agent	TCP	Databases	caution	14.3k
:3868	Diameter Protocol	TCPSCTP	Security	caution	7.7k
:3880	IGRS	TCPUDP	Network Services	caution	5.2k
:3784	Ventrilo	TCPUDP	Gaming	caution	4.9k
:3800	HGG Application Port	TCP	Network Services	caution	4.8k
:3785	Ventrilo Voice Chat	UDP	Gaming	caution	4.4k
:3784	Bidirectional Forwarding Detection (BFD)	TCPUDP	Security	caution	0
:3801	IBM Manager Service	TCPUDP	System	safe	0

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :3817Yosemite Tech Tapeware

Technical Details

Security Information

Related Ports

Port 3817Yosemite Tech Tapeware