Port 5555 (Android Debug Bridge (ADB))

ADB over TCP/IP (adb tcpip 5555), enabled on some Android TV boxes and devices from the factory.

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

What port 5555 is used for

ADB over TCP/IP (adb tcpip 5555), enabled on some Android TV boxes and devices from the factory.

Do not expose to the internet. An exposed ADB port is a root shell; worms such as ADB.Miner spread through it. Disable network debugging.

Service nameProtoDescriptionAssigneeReference

personal-agent TCP Personal Agent Jackie Wu -

personal-agent UDP Personal Agent Jackie Wu -

Linux: is anything listening on TCP 5555?

sudo ss -tlnp 'sport = :5555'

Linux / macOS: which process owns the port

sudo lsof -nP -i :5555

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':5555 '

Windows (Command Prompt)

netstat -ano | findstr :5555

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5555 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 5555

From Windows

Test-NetConnection HOST -Port 5555

ufw

sudo ufw deny 5555/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 5555 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 5555 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 5555' -Direction Inbound -Protocol TCP -LocalPort 5555 -Action Block

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