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Port 3134 (ecp)

IANA assigns port 3134 to ecp: Extensible Code Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ecp TCP Extensible Code Protocol Jim Trek, Mark Bocko -
ecp UDP Extensible Code Protocol Jim Trek, Mark Bocko -

Check what is listening on port 3134

Linux: is anything listening on TCP 3134?
sudo ss -tlnp 'sport = :3134'
Linux: UDP 3134
sudo ss -ulnp 'sport = :3134'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3134
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3134 '
Windows (Command Prompt)
netstat -ano | findstr :3134
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3134 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3134
From Windows
Test-NetConnection HOST -Port 3134
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3134

Block port 3134 in the firewall

ufw
sudo ufw deny 3134/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3134 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3134 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3134' -Direction Inbound -Protocol TCP -LocalPort 3134 -Action Block
ufw
sudo ufw deny 3134/udp
iptables
sudo iptables -A INPUT -p udp --dport 3134 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3134 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3134' -Direction Inbound -Protocol UDP -LocalPort 3134 -Action Block

Related ports

3132ms-rule-engine3133prism-deploy3135peerbook-port3136grubd

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