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Port 1871 (canocentral0)

IANA assigns port 1871 to canocentral0: Cano Central 0.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
canocentral0 TCP Cano Central 0 - -
canocentral0 UDP Cano Central 0 - -

Check what is listening on port 1871

Linux: is anything listening on TCP 1871?
sudo ss -tlnp 'sport = :1871'
Linux: UDP 1871
sudo ss -ulnp 'sport = :1871'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1871
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1871 '
Windows (Command Prompt)
netstat -ano | findstr :1871
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1871 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1871
From Windows
Test-NetConnection HOST -Port 1871
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1871

Block port 1871 in the firewall

ufw
sudo ufw deny 1871/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1871 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1871 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1871' -Direction Inbound -Protocol TCP -LocalPort 1871 -Action Block
ufw
sudo ufw deny 1871/udp
iptables
sudo iptables -A INPUT -p udp --dport 1871 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1871 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1871' -Direction Inbound -Protocol UDP -LocalPort 1871 -Action Block

Related ports

1869transact1870sunscalar-dns1872canocentral11873fjmpjps

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