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Port 1537 (sdsc-lm)

IANA assigns port 1537 to sdsc-lm: isi-lm.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sdsc-lm TCP isi-lm Len Wanger -
sdsc-lm UDP isi-lm Len Wanger -

Check what is listening on port 1537

Linux: is anything listening on TCP 1537?
sudo ss -tlnp 'sport = :1537'
Linux: UDP 1537
sudo ss -ulnp 'sport = :1537'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1537
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1537 '
Windows (Command Prompt)
netstat -ano | findstr :1537
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1537 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1537
From Windows
Test-NetConnection HOST -Port 1537
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1537

Block port 1537 in the firewall

ufw
sudo ufw deny 1537/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1537 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1537 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1537' -Direction Inbound -Protocol TCP -LocalPort 1537 -Action Block
ufw
sudo ufw deny 1537/udp
iptables
sudo iptables -A INPUT -p udp --dport 1537 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1537 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1537' -Direction Inbound -Protocol UDP -LocalPort 1537 -Action Block

Related ports

1535ampr-info1536ampr-inter15383ds-lm1539intellistor-lm

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