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Port 1805 (enl-name)

IANA assigns port 1805 to enl-name: ENL-Name.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
enl-name TCP ENL-Name Brian Olson -
enl-name UDP ENL-Name Brian Olson -

Check what is listening on port 1805

Linux: is anything listening on TCP 1805?
sudo ss -tlnp 'sport = :1805'
Linux: UDP 1805
sudo ss -ulnp 'sport = :1805'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1805
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1805 '
Windows (Command Prompt)
netstat -ano | findstr :1805
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1805 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1805
From Windows
Test-NetConnection HOST -Port 1805
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1805

Block port 1805 in the firewall

ufw
sudo ufw deny 1805/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1805 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1805 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1805' -Direction Inbound -Protocol TCP -LocalPort 1805 -Action Block
ufw
sudo ufw deny 1805/udp
iptables
sudo iptables -A INPUT -p udp --dport 1805 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1805 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1805' -Direction Inbound -Protocol UDP -LocalPort 1805 -Action Block

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