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Port 1440 (eicon-slp)

IANA assigns port 1440 to eicon-slp: Eicon Service Location Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
eicon-slp TCP Eicon Service Location Protocol Pat Calhoun -
eicon-slp UDP Eicon Service Location Protocol Pat Calhoun -

Check what is listening on port 1440

Linux: is anything listening on TCP 1440?
sudo ss -tlnp 'sport = :1440'
Linux: UDP 1440
sudo ss -ulnp 'sport = :1440'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1440
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1440 '
Windows (Command Prompt)
netstat -ano | findstr :1440
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1440 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1440
From Windows
Test-NetConnection HOST -Port 1440
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1440

Block port 1440 in the firewall

ufw
sudo ufw deny 1440/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1440 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1440 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1440' -Direction Inbound -Protocol TCP -LocalPort 1440 -Action Block
ufw
sudo ufw deny 1440/udp
iptables
sudo iptables -A INPUT -p udp --dport 1440 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1440 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1440' -Direction Inbound -Protocol UDP -LocalPort 1440 -Action Block

Related ports

1438eicon-server1439eicon-x251441cadis-11442cadis-2

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