Port 9050 (Tor SOCKS)

The local SOCKS proxy of the Tor daemon (Tor Browser uses 9150).

Registered (user) port, 1024-49151 TCP Proxies and Tor Localhost or LAN only

What port 9050 is used for

The local SOCKS proxy of the Tor daemon (Tor Browser uses 9150).

Localhost or LAN only. Bind it to localhost only; an exposed Tor SOCKS port is an open proxy into Tor.

Service nameProtoDescriptionAssigneeReference

versiera TCP Versiera Agent Listener Frank Pikelner -

Registry dates for this port: registered 2010-01-15.

Linux: is anything listening on TCP 9050?

sudo ss -tlnp 'sport = :9050'

Linux / macOS: which process owns the port

sudo lsof -nP -i :9050

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':9050 '

Windows (Command Prompt)

netstat -ano | findstr :9050

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9050 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 9050

From Windows

Test-NetConnection HOST -Port 9050

ufw

sudo ufw deny 9050/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 9050 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 9050 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 9050' -Direction Inbound -Protocol TCP -LocalPort 9050 -Action Block

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