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Port 7588 (sun-lm)

IANA assigns port 7588 to sun-lm: Sun License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sun-lm TCP Sun License Manager Sophie Deng -
sun-lm UDP Sun License Manager Sophie Deng -

Check what is listening on port 7588

Linux: is anything listening on TCP 7588?
sudo ss -tlnp 'sport = :7588'
Linux: UDP 7588
sudo ss -ulnp 'sport = :7588'
Linux / macOS: which process owns the port
sudo lsof -nP -i :7588
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':7588 '
Windows (Command Prompt)
netstat -ano | findstr :7588
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 7588 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 7588
From Windows
Test-NetConnection HOST -Port 7588
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 7588

Block port 7588 in the firewall

ufw
sudo ufw deny 7588/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 7588 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 7588 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 7588' -Direction Inbound -Protocol TCP -LocalPort 7588 -Action Block
ufw
sudo ufw deny 7588/udp
iptables
sudo iptables -A INPUT -p udp --dport 7588 -j DROP
nftables
sudo nft add rule inet filter input udp dport 7588 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 7588' -Direction Inbound -Protocol UDP -LocalPort 7588 -Action Block

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