CyberHunter
Local dataset, no network
// Other services

Port 7437: Faximum

Port 7437 is assigned by IANA to faximum (Faximum).

7437

How faximum works

Other services
client:7437faximumresponse client:7437faximumresponse

The client sends a request to port 7437 and the faximum 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 7437 dangerous?

We have no specific security note for port 7437. 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 7437

ServicePortTransportDescriptionReferenceUpdated
faximum 7437 TCP, UDP Faximum - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7437, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7437'      # process listening on 7437
sudo lsof -nP -i :7437

macOS

sudo lsof -nP -i :7437

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7437 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7437
netstat -ano | findstr :7437

From another machine

nmap -p 7437 -sV <host>
sudo nmap -sU -p 7437 <host>
nc -zv <host> 7437

Block it in the firewall

sudo ufw deny 7437/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7437" -Direction Inbound -LocalPort 7437 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7437 used for?

Port 7437 is assigned by IANA to faximum (Faximum).

Is port 7437 TCP or UDP?

Port 7437 is registered for TCP and UDP.

Is it safe to open port 7437?

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 7437 is open?

On Linux run "ss -ltnup 'sport = :7437'", on macOS "lsof -nP -i :7437", and on Windows "netstat -ano | findstr :7437" to see the local process. From another machine, "nmap -p 7437 <host>" shows whether it is reachable.

05 Related
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