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Port 1408 (sophia-lm)

IANA assigns port 1408 to sophia-lm: Sophia License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sophia-lm TCP Sophia License Manager Eric Brown -
sophia-lm UDP Sophia License Manager Eric Brown -

Check what is listening on port 1408

Linux: is anything listening on TCP 1408?
sudo ss -tlnp 'sport = :1408'
Linux: UDP 1408
sudo ss -ulnp 'sport = :1408'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1408
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1408 '
Windows (Command Prompt)
netstat -ano | findstr :1408
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1408 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1408
From Windows
Test-NetConnection HOST -Port 1408
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1408

Block port 1408 in the firewall

ufw
sudo ufw deny 1408/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1408 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1408 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1408' -Direction Inbound -Protocol TCP -LocalPort 1408 -Action Block
ufw
sudo ufw deny 1408/udp
iptables
sudo iptables -A INPUT -p udp --dport 1408 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1408 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1408' -Direction Inbound -Protocol UDP -LocalPort 1408 -Action Block

Related ports

1406netlabs-lm1407tibet-server1409here-lm1410hiq

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