HTTPfy

Port 1740 (encore)

IANA assigns port 1740 to encore.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
encore TCP encore Stuart Button -
encore UDP encore Stuart Button -

Check what is listening on port 1740

Linux: is anything listening on TCP 1740?
sudo ss -tlnp 'sport = :1740'
Linux: UDP 1740
sudo ss -ulnp 'sport = :1740'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1740
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1740 '
Windows (Command Prompt)
netstat -ano | findstr :1740
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1740 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1740
From Windows
Test-NetConnection HOST -Port 1740
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1740

Block port 1740 in the firewall

ufw
sudo ufw deny 1740/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1740 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1740 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1740' -Direction Inbound -Protocol TCP -LocalPort 1740 -Action Block
ufw
sudo ufw deny 1740/udp
iptables
sudo iptables -A INPUT -p udp --dport 1740 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1740 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1740' -Direction Inbound -Protocol UDP -LocalPort 1740 -Action Block

Related ports

1738gamegen11739webaccess1741cisco-net-mgmt17423Com-nsd

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