Port 7000 (Cassandra inter-node / AirPlay)

Cassandra gossip and inter-node traffic. On macOS Monterey and later, the AirPlay Receiver (ControlCenter) also listens on 7000 and 5000.

Registered (user) port, 1024-49151 TCP Databases Do not expose to the internet

What port 7000 is used for

Cassandra gossip and inter-node traffic. On macOS Monterey and later, the AirPlay Receiver (ControlCenter) also listens on 7000 and 5000.

Do not expose to the internet. Cassandra cluster traffic must stay internal and should use internode TLS (7001).

Service nameProtoDescriptionAssigneeReference

afs3-fileserver TCP file server itself - -

afs3-fileserver UDP file server itself - -

Linux: is anything listening on TCP 7000?

sudo ss -tlnp 'sport = :7000'

Linux / macOS: which process owns the port

sudo lsof -nP -i :7000

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':7000 '

Windows (Command Prompt)

netstat -ano | findstr :7000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7000 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 7000

From Windows

Test-NetConnection HOST -Port 7000

ufw

sudo ufw deny 7000/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 7000 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 7000 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 7000' -Direction Inbound -Protocol TCP -LocalPort 7000 -Action Block

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