CyberHunter
Local dataset, no network
// Other services

Port 35001: ReadyTech Viewer

Port 35001 is assigned by IANA to rt-viewer (ReadyTech Viewer).

35001

How rt-viewer works

Other services
client:35001rt-viewerresponse client:35001rt-viewerresponse

The client sends a request to port 35001 and the rt-viewer 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 35001 dangerous?

We have no specific security note for port 35001. 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 35001

ServicePortTransportDescriptionReferenceUpdated
rt-viewer 35001 TCP, UDP ReadyTech Viewer - 2013-09-13

// source: IANA service name and port number registry

03 Check it

Which program uses port 35001, and is it reachable?

Linux

sudo ss -ltnup 'sport = :35001'      # process listening on 35001
sudo lsof -nP -i :35001

macOS

sudo lsof -nP -i :35001

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 35001 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 35001
netstat -ano | findstr :35001

From another machine

nmap -p 35001 -sV <host>
sudo nmap -sU -p 35001 <host>
nc -zv <host> 35001

Block it in the firewall

sudo ufw deny 35001/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 35001" -Direction Inbound -LocalPort 35001 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 35001 used for?

Port 35001 is assigned by IANA to rt-viewer (ReadyTech Viewer).

Is port 35001 TCP or UDP?

Port 35001 is registered for TCP and UDP.

Is it safe to open port 35001?

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 35001 is open?

On Linux run "ss -ltnup 'sport = :35001'", on macOS "lsof -nP -i :35001", and on Windows "netstat -ano | findstr :35001" to see the local process. From another machine, "nmap -p 35001 <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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