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Port 5670 (filemq, zre-disc)

IANA assigns port 5670 to filemq, zre-disc: ZeroMQ file publish-subscribe protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
filemq TCP ZeroMQ file publish-subscribe protocol Pieter Hintjens2 -
zre-disc UDP Local area discovery and messaging over ZeroMQ Pieter Hintjens 3 -

Registry dates for this port: registered 2012-11-01, last modified 2013-02-25.

Check what is listening on port 5670

Linux: is anything listening on TCP 5670?
sudo ss -tlnp 'sport = :5670'
Linux: UDP 5670
sudo ss -ulnp 'sport = :5670'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5670
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5670 '
Windows (Command Prompt)
netstat -ano | findstr :5670
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5670 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5670
From Windows
Test-NetConnection HOST -Port 5670
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5670

Block port 5670 in the firewall

ufw
sudo ufw deny 5670/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5670 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5670 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5670' -Direction Inbound -Protocol TCP -LocalPort 5670 -Action Block
ufw
sudo ufw deny 5670/udp
iptables
sudo iptables -A INPUT -p udp --dport 5670 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5670 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5670' -Direction Inbound -Protocol UDP -LocalPort 5670 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.