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Port 1746 (ftrapid-1)

IANA assigns port 1746 to ftrapid-1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ftrapid-1 TCP ftrapid-1 - -
ftrapid-1 UDP ftrapid-1 - -

Check what is listening on port 1746

Linux: is anything listening on TCP 1746?
sudo ss -tlnp 'sport = :1746'
Linux: UDP 1746
sudo ss -ulnp 'sport = :1746'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1746
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1746 '
Windows (Command Prompt)
netstat -ano | findstr :1746
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1746 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1746
From Windows
Test-NetConnection HOST -Port 1746
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1746

Block port 1746 in the firewall

ufw
sudo ufw deny 1746/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1746 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1746 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1746' -Direction Inbound -Protocol TCP -LocalPort 1746 -Action Block
ufw
sudo ufw deny 1746/udp
iptables
sudo iptables -A INPUT -p udp --dport 1746 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1746 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1746' -Direction Inbound -Protocol UDP -LocalPort 1746 -Action Block

Related ports

1744ncpm-ft1745remote-winsock1747ftrapid-21748oracle-em1

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