Port 5005 (Java debug (JDWP))

Conventional port for the Java Debug Wire Protocol (-agentlib:jdwp=...,address=*:5005), used by IntelliJ and Spring Boot remote debugging.

Registered (user) port, 1024-49151 TCP Development tools Localhost or LAN only

What port 5005 is used for

Conventional port for the Java Debug Wire Protocol (-agentlib:jdwp=...,address=*:5005), used by IntelliJ and Spring Boot remote debugging.

Localhost or LAN only. JDWP has no authentication and allows arbitrary code execution; never expose it.

Service nameProtoDescriptionAssigneeReference

avt-profile-2 TCP RTP control protocol - RFC 3551, RFC 4571

avt-profile-2 UDP RTP control protocol - RFC 3551

avt-profile-2 DCCP RTP control protocol - RFC 3551, RFC 5762

Linux: is anything listening on TCP 5005?

sudo ss -tlnp 'sport = :5005'

Linux / macOS: which process owns the port

sudo lsof -nP -i :5005

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':5005 '

Windows (Command Prompt)

netstat -ano | findstr :5005

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5005 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 5005

From Windows

Test-NetConnection HOST -Port 5005

ufw

sudo ufw deny 5005/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 5005 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 5005 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 5005' -Direction Inbound -Protocol TCP -LocalPort 5005 -Action Block

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