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Port 6583 (joaJewelSuite)

IANA assigns port 6583 to joaJewelSuite: JOA Jewel Suite.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
joaJewelSuite TCP JOA Jewel Suite Bob Rundle -
joaJewelSuite UDP JOA Jewel Suite Bob Rundle -

Registry dates for this port: registered 2005-11.

Check what is listening on port 6583

Linux: is anything listening on TCP 6583?
sudo ss -tlnp 'sport = :6583'
Linux: UDP 6583
sudo ss -ulnp 'sport = :6583'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6583
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6583 '
Windows (Command Prompt)
netstat -ano | findstr :6583
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6583 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6583
From Windows
Test-NetConnection HOST -Port 6583
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 6583

Block port 6583 in the firewall

ufw
sudo ufw deny 6583/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6583 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6583 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6583' -Direction Inbound -Protocol TCP -LocalPort 6583 -Action Block
ufw
sudo ufw deny 6583/udp
iptables
sudo iptables -A INPUT -p udp --dport 6583 -j DROP
nftables
sudo nft add rule inet filter input udp dport 6583 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 6583' -Direction Inbound -Protocol UDP -LocalPort 6583 -Action Block

Related ports

6581parsec-peer6582parsec-game6600mshvlm6601mstmg-sstp

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.