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Port 1471 (csdmbase)

IANA assigns port 1471 to csdmbase.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
csdmbase TCP csdmbase - -
csdmbase UDP csdmbase - -

Check what is listening on port 1471

Linux: is anything listening on TCP 1471?
sudo ss -tlnp 'sport = :1471'
Linux: UDP 1471
sudo ss -ulnp 'sport = :1471'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1471
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1471 '
Windows (Command Prompt)
netstat -ano | findstr :1471
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1471 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1471
From Windows
Test-NetConnection HOST -Port 1471
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1471

Block port 1471 in the firewall

ufw
sudo ufw deny 1471/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1471 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1471 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1471' -Direction Inbound -Protocol TCP -LocalPort 1471 -Action Block
ufw
sudo ufw deny 1471/udp
iptables
sudo iptables -A INPUT -p udp --dport 1471 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1471 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1471' -Direction Inbound -Protocol UDP -LocalPort 1471 -Action Block

Related ports

1467csdmbase1469aal-lm1470uaiact1472csdm1473openmath

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