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Port 3728 (e-woa)

IANA assigns port 3728 to e-woa: Ericsson Web on Air.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
e-woa TCP Ericsson Web on Air Marco Casole -
e-woa UDP Ericsson Web on Air Marco Casole -

Registry dates for this port: registered 2003-04.

Check what is listening on port 3728

Linux: is anything listening on TCP 3728?
sudo ss -tlnp 'sport = :3728'
Linux: UDP 3728
sudo ss -ulnp 'sport = :3728'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3728
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3728 '
Windows (Command Prompt)
netstat -ano | findstr :3728
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3728 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3728
From Windows
Test-NetConnection HOST -Port 3728
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3728

Block port 3728 in the firewall

ufw
sudo ufw deny 3728/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3728 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3728 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3728' -Direction Inbound -Protocol TCP -LocalPort 3728 -Action Block
ufw
sudo ufw deny 3728/udp
iptables
sudo iptables -A INPUT -p udp --dport 3728 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3728 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3728' -Direction Inbound -Protocol UDP -LocalPort 3728 -Action Block

Related ports

3726array-manager3727e-mdu3729fksp-audit3730client-ctrl

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