Port 3426Arkivio Storage Protocol

Port 3426 is assigned to the Arkivio Storage Protocol, a little-documented storage service registered to Bruce Greenblatt.

inFile Transfer

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

Technical Details

what runs on :3426

Arkivio Storage Protocol is registered on port :3426 over tcp and udp to Bruce Greenblatt, assigned February 2002. 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 never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :3426

this machine

# linux
sudo ss -tulpn 'sport = :3426'

# macos / bsd
sudo lsof -nP -i :3426

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3426

another host

nmap -sV -p T:3426 <host>
sudo nmap -sU -sV -p U:3426 <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 :3426

risk score

1/ 10safe

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

file transfer averages 3.5 across 169 ports — this one sits 2.5 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

no security notes recorded for :3426 yet

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

Record

iana registry entry

port: :3426
service: Arkivio Storage Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: File Transfer
usage: IANA lists TCP and UDP port 3426 for the Arkivio Storage Protocol, registered to Bruce Greenblatt in 2002. Its actual deployments and behavior are not well documented, and it has not appeared open in nmap's internet-wide scan data.
lookups: 0rank 993
added: 2026-09-29
updated: 2026-09-29
references: IANA service name registry — port 3426

Something wrong?

This record is maintained by the engineers who use port 3426. 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 2026-09-29.

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

all 169 in file transfer →

the 8 most looked-up other ports in file transfer — 169 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:17500	Dropbox LAN Sync	TCPUDP	File Transfer	caution	43.7k
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:8080	FilePhile Relay	UDP	File Transfer	caution	25.6k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :3426Arkivio Storage Protocol

Technical Details

Security Information

Related Ports

Port 3426Arkivio Storage Protocol