- 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.
Port 8091: Jam Link Framework
Port 8091 is assigned by IANA to jamlink (Jam Link Framework).
8091
How jamlink works
Other servicesThe client sends a request to port 8091 and the jamlink service answers.
- Transport
- TCP
- 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
Is port 8091 dangerous?
We have no specific security note for port 8091. Its risk depends on the program actually listening on it. General advice for other services services:
IANA registry entries for port 8091
| Service | Port | Transport | Description | Reference | Updated |
|---|---|---|---|---|---|
| jamlink | 8091 | TCP | Jam Link Framework | - | 2009-11-25 |
| - | 8091 | - | Reserved | - | - |
// source: IANA service name and port number registry
Which program uses port 8091, and is it reachable?
Linux
sudo ss -ltnup 'sport = :8091' # process listening on 8091
sudo lsof -nP -i :8091macOS
sudo lsof -nP -i :8091
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8091 -State Listen | Select LocalAddress, OwningProcess Get-NetUDPEndpoint -LocalPort 8091 netstat -ano | findstr :8091
From another machine
nmap -p 8091 -sV <host> nc -zv <host> 8091
Block it in the firewall
sudo ufw deny 8091/tcp # Linux (ufw) New-NetFirewallRule -DisplayName "Block 8091" -Direction Inbound -LocalPort 8091 -Protocol TCP -Action Block # Windows
What is port 8091 used for?
Port 8091 is assigned by IANA to jamlink (Jam Link Framework).
Is port 8091 TCP or UDP?
Port 8091 is registered for TCP.
Is it safe to open port 8091?
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 8091 is open?
On Linux run "ss -ltnup 'sport = :8091'", on macOS "lsof -nP -i :8091", and on Windows "netstat -ano | findstr :8091" to see the local process. From another machine, "nmap -p 8091 <host>" shows whether it is reachable.
Other other services ports
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