CyberHunter
Local dataset, no network
// Other services

Port 1937: JetVWay Server Port

Port 1937 is assigned by IANA to jwserver (JetVWay Server Port).

1937

How jwserver works

Other services
client:1937jwserverresponse client:1937jwserverresponse

The client sends a request to port 1937 and the jwserver 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 1937 dangerous?

We have no specific security note for port 1937. 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 1937

ServicePortTransportDescriptionReferenceUpdated
jwserver 1937 TCP, UDP JetVWay Server Port - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1937, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1937'      # process listening on 1937
sudo lsof -nP -i :1937

macOS

sudo lsof -nP -i :1937

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1937 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1937
netstat -ano | findstr :1937

From another machine

nmap -p 1937 -sV <host>
sudo nmap -sU -p 1937 <host>
nc -zv <host> 1937

Block it in the firewall

sudo ufw deny 1937/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1937" -Direction Inbound -LocalPort 1937 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1937 used for?

Port 1937 is assigned by IANA to jwserver (JetVWay Server Port).

Is port 1937 TCP or UDP?

Port 1937 is registered for TCP and UDP.

Is it safe to open port 1937?

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 1937 is open?

On Linux run "ss -ltnup 'sport = :1937'", on macOS "lsof -nP -i :1937", and on Windows "netstat -ano | findstr :1937" to see the local process. From another machine, "nmap -p 1937 <host>" shows whether it is reachable.

05 Related
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