CyberHunter
Local dataset, no network
// Other services

Port 7023: Comtech T2 NMCS

Port 7023 is assigned by IANA to ct2nmcs (Comtech T2 NMCS).

7023

How ct2nmcs works

Other services
client:7023ct2nmcsresponse client:7023ct2nmcsresponse

The client sends a request to port 7023 and the ct2nmcs 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 7023 dangerous?

We have no specific security note for port 7023. 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 7023

ServicePortTransportDescriptionReferenceUpdated
ct2nmcs 7023 TCP, UDP Comtech T2 NMCS - 2005-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 7023, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7023'      # process listening on 7023
sudo lsof -nP -i :7023

macOS

sudo lsof -nP -i :7023

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7023 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7023
netstat -ano | findstr :7023

From another machine

nmap -p 7023 -sV <host>
sudo nmap -sU -p 7023 <host>
nc -zv <host> 7023

Block it in the firewall

sudo ufw deny 7023/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7023" -Direction Inbound -LocalPort 7023 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7023 used for?

Port 7023 is assigned by IANA to ct2nmcs (Comtech T2 NMCS).

Is port 7023 TCP or UDP?

Port 7023 is registered for TCP and UDP.

Is it safe to open port 7023?

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 7023 is open?

On Linux run "ss -ltnup 'sport = :7023'", on macOS "lsof -nP -i :7023", and on Windows "netstat -ano | findstr :7023" to see the local process. From another machine, "nmap -p 7023 <host>" shows whether it is reachable.

05 Related
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