CyberHunter
Local dataset, no network
// Other services

Port 1859: Gamma Fetcher Server

Port 1859 is assigned by IANA to gammafetchsvr (Gamma Fetcher Server).

1859

How gammafetchsvr works

Other services
client:1859gammafetchsvrresponse client:1859gammafetchsvrresponse

The client sends a request to port 1859 and the gammafetchsvr 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 1859 dangerous?

We have no specific security note for port 1859. 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 1859

ServicePortTransportDescriptionReferenceUpdated
gammafetchsvr 1859 TCP, UDP Gamma Fetcher Server - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1859, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1859'      # process listening on 1859
sudo lsof -nP -i :1859

macOS

sudo lsof -nP -i :1859

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1859 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1859
netstat -ano | findstr :1859

From another machine

nmap -p 1859 -sV <host>
sudo nmap -sU -p 1859 <host>
nc -zv <host> 1859

Block it in the firewall

sudo ufw deny 1859/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1859" -Direction Inbound -LocalPort 1859 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1859 used for?

Port 1859 is assigned by IANA to gammafetchsvr (Gamma Fetcher Server).

Is port 1859 TCP or UDP?

Port 1859 is registered for TCP and UDP.

Is it safe to open port 1859?

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 1859 is open?

On Linux run "ss -ltnup 'sport = :1859'", on macOS "lsof -nP -i :1859", and on Windows "netstat -ano | findstr :1859" to see the local process. From another machine, "nmap -p 1859 <host>" shows whether it is reachable.

05 Related
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