CyberHunter
Local dataset, no network
// Other services

Port 7021: DP Serve Admin

Port 7021 is assigned by IANA to dpserveadmin (DP Serve Admin).

7021

How dpserveadmin works

Other services
client:7021dpserveadminresponse client:7021dpserveadminresponse

The client sends a request to port 7021 and the dpserveadmin 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 7021 dangerous?

We have no specific security note for port 7021. 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 7021

ServicePortTransportDescriptionReferenceUpdated
dpserveadmin 7021 TCP, UDP DP Serve Admin - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7021, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7021'      # process listening on 7021
sudo lsof -nP -i :7021

macOS

sudo lsof -nP -i :7021

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7021 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7021
netstat -ano | findstr :7021

From another machine

nmap -p 7021 -sV <host>
sudo nmap -sU -p 7021 <host>
nc -zv <host> 7021

Block it in the firewall

sudo ufw deny 7021/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7021" -Direction Inbound -LocalPort 7021 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7021 used for?

Port 7021 is assigned by IANA to dpserveadmin (DP Serve Admin).

Is port 7021 TCP or UDP?

Port 7021 is registered for TCP and UDP.

Is it safe to open port 7021?

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 7021 is open?

On Linux run "ss -ltnup 'sport = :7021'", on macOS "lsof -nP -i :7021", and on Windows "netstat -ano | findstr :7021" to see the local process. From another machine, "nmap -p 7021 <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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