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Port 8191 (limnerpressure)

IANA assigns port 8191 to limnerpressure: Limner Pressure.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
limnerpressure TCP Limner Pressure Aaron Kleinsteiber -

Registry dates for this port: registered 2014-01-16.

Check what is listening on port 8191

Linux: is anything listening on TCP 8191?
sudo ss -tlnp 'sport = :8191'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8191
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8191 '
Windows (Command Prompt)
netstat -ano | findstr :8191
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8191 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8191
From Windows
Test-NetConnection HOST -Port 8191

Block port 8191 in the firewall

ufw
sudo ufw deny 8191/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8191 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8191 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8191' -Direction Inbound -Protocol TCP -LocalPort 8191 -Action Block

Related ports

8184itach8190gcp-rphy8192spytechphone8194blp1

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.