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Port 1457 (valisys-lm)

IANA assigns port 1457 to valisys-lm: Valisys License Manager.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
valisys-lm TCP Valisys License Manager Leslie Lincoln -
valisys-lm UDP Valisys License Manager Leslie Lincoln -

Check what is listening on port 1457

Linux: is anything listening on TCP 1457?
sudo ss -tlnp 'sport = :1457'
Linux: UDP 1457
sudo ss -ulnp 'sport = :1457'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1457
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1457 '
Windows (Command Prompt)
netstat -ano | findstr :1457
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1457 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1457
From Windows
Test-NetConnection HOST -Port 1457
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1457

Block port 1457 in the firewall

ufw
sudo ufw deny 1457/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1457 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1457 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1457' -Direction Inbound -Protocol TCP -LocalPort 1457 -Action Block
ufw
sudo ufw deny 1457/udp
iptables
sudo iptables -A INPUT -p udp --dport 1457 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1457 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1457' -Direction Inbound -Protocol UDP -LocalPort 1457 -Action Block

Related ports

1455esl-lm1456dca1458nrcabq-lm1459proshare1

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