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Port 48653 (robotraconteur)

IANA assigns port 48653 to robotraconteur: Robot Raconteur transport.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
robotraconteur TCP Robot Raconteur transport Wason Technology LLC -
robotraconteur UDP Robot Raconteur transport Wason Technology LLC -

Registry dates for this port: registered 2014-01-27.

Check what is listening on port 48653

Linux: is anything listening on TCP 48653?
sudo ss -tlnp 'sport = :48653'
Linux: UDP 48653
sudo ss -ulnp 'sport = :48653'
Linux / macOS: which process owns the port
sudo lsof -nP -i :48653
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':48653 '
Windows (Command Prompt)
netstat -ano | findstr :48653
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 48653 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 48653
From Windows
Test-NetConnection HOST -Port 48653
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 48653

Block port 48653 in the firewall

ufw
sudo ufw deny 48653/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 48653 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 48653 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 48653' -Direction Inbound -Protocol TCP -LocalPort 48653 -Action Block
ufw
sudo ufw deny 48653/udp
iptables
sudo iptables -A INPUT -p udp --dport 48653 -j DROP
nftables
sudo nft add rule inet filter input udp dport 48653 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 48653' -Direction Inbound -Protocol UDP -LocalPort 48653 -Action Block

Related ports

48556com-bardac-dw48619iqobject49000matahari49001nusrp, nusdp-disc

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.