Port 35004ReadyTech ClassManager

TCP and UDP port 35004 is assigned to ReadyTech ClassManager, a service registered to ReadyTech Corporation.

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

also known as rt-classmanager

Technical Details

what runs on :35004

ReadyTech ClassManager is registered on port :35004 over tcp and udp to ReadyTech Corporation, assigned September 2013. 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 :35004

this machine

# linux
sudo ss -tulpn 'sport = :35004'

# macos / bsd
sudo lsof -nP -i :35004

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :35004

another host

nmap -sV -p T:35004 <host>
sudo nmap -sU -sV -p U:35004 <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 :35004

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 :35004 yet

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

Record

iana registry entry

port: :35004
service: ReadyTech ClassManager
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The IANA registry assigns this port to ReadyTech ClassManager and lists ReadyTech Corporation as the registrant. It does not document the protocol or typical deployment.
lookups: 0rank 993
added: 2026-10-20
updated: 2026-10-20
references: IANA service name registry — port 35004

Something wrong?

This record is maintained by the engineers who use port 35004. 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 2026-10-20.

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 :35004, by lookups.

port	service	proto	category	risk
:34962	PROFINET RT Unicast	TCPUDP	Network Services	risk
:35002	ReadyTech Sound Server	TCP	Media	safe
:35003	ReadyTech DeviceMapper Server	TCP	—	safe
:34963	PROFINET RT Multicast	TCPUDP	Network Services	safe
:34964	PROFINET Context Manager	TCPUDP	Network Services	risk
:34965	PROFINET Secure Connection Management and Key Provisioning	TCPUDP	Network Services	safe
:34966	PROFINET Secure Real-Time	UDPtls	Network Services	safe
:34980	EtherCAT (Ethernet for Control Automation Technology)	TCPUDP	Network Services	critical

risk mix of the 8 listed

safe63%
risk25%
critical13%

1 of 8 encrypted

Port :35004ReadyTech ClassManager

Technical Details

Security Information

Related Ports

Port 35004ReadyTech ClassManager