Port 8600 (Consul DNS)

Consul's DNS interface for service discovery (service.consul names).

Registered (user) port, 1024-49151 TCPUDP Network infrastructure Do not expose to the internet

What port 8600 is used for

Consul's DNS interface for service discovery (service.consul names).

Do not expose to the internet. Internal only.

Service nameProtoDescriptionAssigneeReference

asterix TCP Surveillance Data Eivan Cerasi -

asterix UDP Surveillance Data Eivan Cerasi -

Registry dates for this port: registered 2005-11.

Linux: is anything listening on TCP 8600?

sudo ss -tlnp 'sport = :8600'

Linux: UDP 8600

sudo ss -ulnp 'sport = :8600'

Linux / macOS: which process owns the port

sudo lsof -nP -i :8600

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':8600 '

Windows (Command Prompt)

netstat -ano | findstr :8600

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8600 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 8600

From Windows

Test-NetConnection HOST -Port 8600

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 8600

ufw

sudo ufw deny 8600/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 8600 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 8600 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 8600' -Direction Inbound -Protocol TCP -LocalPort 8600 -Action Block

ufw

sudo ufw deny 8600/udp

iptables

sudo iptables -A INPUT -p udp --dport 8600 -j DROP

nftables

sudo nft add rule inet filter input udp dport 8600 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 8600' -Direction Inbound -Protocol UDP -LocalPort 8600 -Action Block

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