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Port 1580 (tn-tl-r1, tn-tl-r2)

IANA assigns port 1580 to tn-tl-r1, tn-tl-r2: tn-tl-r1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
tn-tl-r1 TCP tn-tl-r1 - -
tn-tl-r2 UDP tn-tl-r2 Ed Kress -

Check what is listening on port 1580

Linux: is anything listening on TCP 1580?
sudo ss -tlnp 'sport = :1580'
Linux: UDP 1580
sudo ss -ulnp 'sport = :1580'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1580
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1580 '
Windows (Command Prompt)
netstat -ano | findstr :1580
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1580 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1580
From Windows
Test-NetConnection HOST -Port 1580
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1580

Block port 1580 in the firewall

ufw
sudo ufw deny 1580/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1580 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1580 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1580' -Direction Inbound -Protocol TCP -LocalPort 1580 -Action Block
ufw
sudo ufw deny 1580/udp
iptables
sudo iptables -A INPUT -p udp --dport 1580 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1580 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1580' -Direction Inbound -Protocol UDP -LocalPort 1580 -Action Block

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