Port 4132 (nuts-dem, nuts_dem)

IANA assigns port 4132 to nuts-dem, nuts_dem: NUTS Daemon IANA assigned this well-formed service name as a replacement for "nuts_dem"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

nuts-dem TCP NUTS Daemon IANA assigned this well-formed service name as a replacement for "nuts_dem". - -

nuts_dem TCP NUTS Daemon
This entry is an alias to "nuts-dem". This entry is now historic, not usable for use with many common service discovery mechanisms. - -

nuts-dem UDP NUTS Daemon IANA assigned this well-formed service name as a replacement for "nuts_dem". - -

nuts_dem UDP NUTS Daemon
This entry is an alias to "nuts-dem". This entry is now historic, not usable for use with many common service discovery mechanisms. - -

Check what is listening on port 4132

Linux: is anything listening on TCP 4132?

sudo ss -tlnp 'sport = :4132'

Linux: UDP 4132

sudo ss -ulnp 'sport = :4132'

Linux / macOS: which process owns the port

sudo lsof -nP -i :4132

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':4132 '

Windows (Command Prompt)

netstat -ano | findstr :4132

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4132 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 4132

From Windows

Test-NetConnection HOST -Port 4132

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

nc -vzu -w 5 HOST 4132

Block port 4132 in the firewall

ufw

sudo ufw deny 4132/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 4132 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 4132 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 4132' -Direction Inbound -Protocol TCP -LocalPort 4132 -Action Block

ufw

sudo ufw deny 4132/udp