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// Other services

Port 7397: Hexarc Command Language

Port 7397 is assigned by IANA to hexarc (Hexarc Command Language).

7397

How hexarc works

Other services
client:7397hexarcresponse client:7397hexarcresponse

The client sends a request to port 7397 and the hexarc 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 7397 dangerous?

We have no specific security note for port 7397. 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 7397

ServicePortTransportDescriptionReferenceUpdated
hexarc 7397 TCP, UDP Hexarc Command Language - 2004-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 7397, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7397'      # process listening on 7397
sudo lsof -nP -i :7397

macOS

sudo lsof -nP -i :7397

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7397 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7397
netstat -ano | findstr :7397

From another machine

nmap -p 7397 -sV <host>
sudo nmap -sU -p 7397 <host>
nc -zv <host> 7397

Block it in the firewall

sudo ufw deny 7397/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7397" -Direction Inbound -LocalPort 7397 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7397 used for?

Port 7397 is assigned by IANA to hexarc (Hexarc Command Language).

Is port 7397 TCP or UDP?

Port 7397 is registered for TCP and UDP.

Is it safe to open port 7397?

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 7397 is open?

On Linux run "ss -ltnup 'sport = :7397'", on macOS "lsof -nP -i :7397", and on Windows "netstat -ano | findstr :7397" to see the local process. From another machine, "nmap -p 7397 <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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