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// Other services

Port 3045: ResponseNet

Port 3045 is assigned by IANA to responsenet (ResponseNet).

3045

How responsenet works

Other services
client:3045responsenetresponse client:3045responsenetresponse

The client sends a request to port 3045 and the responsenet 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 3045 dangerous?

We have no specific security note for port 3045. 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 3045

ServicePortTransportDescriptionReferenceUpdated
responsenet 3045 TCP, UDP ResponseNet - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3045, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3045'      # process listening on 3045
sudo lsof -nP -i :3045

macOS

sudo lsof -nP -i :3045

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3045 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3045
netstat -ano | findstr :3045

From another machine

nmap -p 3045 -sV <host>
sudo nmap -sU -p 3045 <host>
nc -zv <host> 3045

Block it in the firewall

sudo ufw deny 3045/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3045" -Direction Inbound -LocalPort 3045 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3045 used for?

Port 3045 is assigned by IANA to responsenet (ResponseNet).

Is port 3045 TCP or UDP?

Port 3045 is registered for TCP and UDP.

Is it safe to open port 3045?

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 3045 is open?

On Linux run "ss -ltnup 'sport = :3045'", on macOS "lsof -nP -i :3045", and on Windows "netstat -ano | findstr :3045" to see the local process. From another machine, "nmap -p 3045 <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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