Port 24003 (med-supp)

IANA assigns port 24003 to med-supp.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

med-supp TCP med-supp Juergen Fischbach -

med-supp UDP med-supp Juergen Fischbach -

Linux: is anything listening on TCP 24003?

sudo ss -tlnp 'sport = :24003'

Linux: UDP 24003

sudo ss -ulnp 'sport = :24003'

Linux / macOS: which process owns the port

sudo lsof -nP -i :24003

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':24003 '

Windows (Command Prompt)

netstat -ano | findstr :24003

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 24003 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 24003

From Windows

Test-NetConnection HOST -Port 24003

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

nc -vzu -w 5 HOST 24003

ufw

sudo ufw deny 24003/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 24003 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 24003 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 24003' -Direction Inbound -Protocol TCP -LocalPort 24003 -Action Block

ufw

sudo ufw deny 24003/udp

iptables

sudo iptables -A INPUT -p udp --dport 24003 -j DROP

nftables

sudo nft add rule inet filter input udp dport 24003 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 24003' -Direction Inbound -Protocol UDP -LocalPort 24003 -Action Block

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