HTTPfy

Port 1874 (fjswapsnp)

IANA assigns port 1874 to fjswapsnp: Fjswapsnp.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
fjswapsnp TCP Fjswapsnp Y Ohiwa -
fjswapsnp UDP Fjswapsnp Y Ohiwa -

Check what is listening on port 1874

Linux: is anything listening on TCP 1874?
sudo ss -tlnp 'sport = :1874'
Linux: UDP 1874
sudo ss -ulnp 'sport = :1874'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1874
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1874 '
Windows (Command Prompt)
netstat -ano | findstr :1874
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1874 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1874
From Windows
Test-NetConnection HOST -Port 1874
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1874

Block port 1874 in the firewall

ufw
sudo ufw deny 1874/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1874 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1874 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1874' -Direction Inbound -Protocol TCP -LocalPort 1874 -Action Block
ufw
sudo ufw deny 1874/udp
iptables
sudo iptables -A INPUT -p udp --dport 1874 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1874 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1874' -Direction Inbound -Protocol UDP -LocalPort 1874 -Action Block

Related ports

1872canocentral11873fjmpjps1875westell-stats1876ewcappsrv

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