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// Other services

Port 35004: ReadyTech ClassManager

Port 35004 is assigned by IANA to rt-classmanager (ReadyTech ClassManager).

35004

How rt-classmanager works

Other services
client:35004rt-classmanagerresponse client:35004rt-classmanagerresponse

The client sends a request to port 35004 and the rt-classmanager service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 35004 dangerous?

We have no specific security note for port 35004. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 35004

ServicePortTransportDescriptionReferenceUpdated
rt-classmanager 35004 TCP, UDP ReadyTech ClassManager - 2013-09-13

// source: IANA service name and port number registry

03 Check it

Which program uses port 35004, and is it reachable?

Linux

sudo ss -ltnup 'sport = :35004'      # process listening on 35004
sudo lsof -nP -i :35004

macOS

sudo lsof -nP -i :35004

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 35004 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 35004
netstat -ano | findstr :35004

From another machine

nmap -p 35004 -sV <host>
sudo nmap -sU -p 35004 <host>
nc -zv <host> 35004

Block it in the firewall

sudo ufw deny 35004/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 35004" -Direction Inbound -LocalPort 35004 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 35004 used for?

Port 35004 is assigned by IANA to rt-classmanager (ReadyTech ClassManager).

Is port 35004 TCP or UDP?

Port 35004 is registered for TCP and UDP.

Is it safe to open port 35004?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 35004 is open?

On Linux run "ss -ltnup 'sport = :35004'", on macOS "lsof -nP -i :35004", and on Windows "netstat -ano | findstr :35004" to see the local process. From another machine, "nmap -p 35004 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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