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Port 1137 (trim)

IANA assigns port 1137 to trim: TRIM Workgroup Service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
trim TCP TRIM Workgroup Service Siva Poobalasingam -
trim UDP TRIM Workgroup Service Siva Poobalasingam -

Registry dates for this port: registered 2006-03.

Check what is listening on port 1137

Linux: is anything listening on TCP 1137?
sudo ss -tlnp 'sport = :1137'
Linux: UDP 1137
sudo ss -ulnp 'sport = :1137'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1137
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1137 '
Windows (Command Prompt)
netstat -ano | findstr :1137
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1137 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1137
From Windows
Test-NetConnection HOST -Port 1137
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1137

Block port 1137 in the firewall

ufw
sudo ufw deny 1137/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1137 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1137 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1137' -Direction Inbound -Protocol TCP -LocalPort 1137 -Action Block
ufw
sudo ufw deny 1137/udp
iptables
sudo iptables -A INPUT -p udp --dport 1137 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1137 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1137' -Direction Inbound -Protocol UDP -LocalPort 1137 -Action Block

Related ports

1135omnivision1136hhb-gateway1138encrypted-admin, encrypted_admin1139evm

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