HTTPfy

Port 3524 (ecmport)

IANA assigns port 3524 to ecmport: ECM Server port.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ecmport TCP ECM Server port - -
ecmport UDP ECM Server port - -

Check what is listening on port 3524

Linux: is anything listening on TCP 3524?
sudo ss -tlnp 'sport = :3524'
Linux: UDP 3524
sudo ss -ulnp 'sport = :3524'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3524
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3524 '
Windows (Command Prompt)
netstat -ano | findstr :3524
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3524 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3524
From Windows
Test-NetConnection HOST -Port 3524
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3524

Block port 3524 in the firewall

ufw
sudo ufw deny 3524/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3524 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3524 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3524' -Direction Inbound -Protocol TCP -LocalPort 3524 -Action Block
ufw
sudo ufw deny 3524/udp
iptables
sudo iptables -A INPUT -p udp --dport 3524 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3524 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3524' -Direction Inbound -Protocol UDP -LocalPort 3524 -Action Block

Related ports

3522nssocketport3523odeumservlink3525eisport3526starquiz-port

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