Port 6672 (vision-server, vision_server)

IANA assigns port 6672 to vision-server, vision_server: vision_server IANA assigned this well-formed service name as a replacement for "vision_server"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

vision-server TCP vision_server IANA assigned this well-formed service name as a replacement for "vision_server". Chris Kramer -

vision_server TCP vision_server
This entry is an alias to "vision-server". This entry is now historic, not usable for use with many common service discovery mechanisms. Chris Kramer -

vision-server UDP vision_server IANA assigned this well-formed service name as a replacement for "vision_server". Chris Kramer -

vision_server UDP vision_server
This entry is an alias to "vision-server". This entry is now historic, not usable for use with many common service discovery mechanisms. Chris Kramer -

Check what is listening on port 6672

Linux: is anything listening on TCP 6672?

sudo ss -tlnp 'sport = :6672'

Linux: UDP 6672

sudo ss -ulnp 'sport = :6672'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6672

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6672 '

Windows (Command Prompt)

netstat -ano | findstr :6672

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6672 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 6672

From Windows

Test-NetConnection HOST -Port 6672

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

nc -vzu -w 5 HOST 6672

Block port 6672 in the firewall

ufw

sudo ufw deny 6672/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6672 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6672 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6672' -Direction Inbound -Protocol TCP -LocalPort 6672 -Action Block

ufw

sudo ufw deny 6672/udp