Port 6506 (badm-pub, badm_pub)

IANA assigns port 6506 to badm-pub, badm_pub: BoKS Admin Public Port IANA assigned this well-formed service name as a replacement for "badm_pub"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

badm-pub TCP BoKS Admin Public Port IANA assigned this well-formed service name as a replacement for "badm_pub". Magnus Nystrom -

badm_pub TCP BoKS Admin Public Port
This entry is an alias to "badm-pub". This entry is now historic, not usable for use with many common service discovery mechanisms. Magnus Nystrom -

badm-pub UDP BoKS Admin Public Port IANA assigned this well-formed service name as a replacement for "badm_pub". Magnus Nystrom -

badm_pub UDP BoKS Admin Public Port
This entry is an alias to "badm-pub". This entry is now historic, not usable for use with many common service discovery mechanisms. Magnus Nystrom -

Check what is listening on port 6506

Linux: is anything listening on TCP 6506?

sudo ss -tlnp 'sport = :6506'

Linux: UDP 6506

sudo ss -ulnp 'sport = :6506'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6506

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6506 '

Windows (Command Prompt)

netstat -ano | findstr :6506

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6506 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 6506

From Windows

Test-NetConnection HOST -Port 6506

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

nc -vzu -w 5 HOST 6506

Block port 6506 in the firewall

ufw

sudo ufw deny 6506/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6506 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6506 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6506' -Direction Inbound -Protocol TCP -LocalPort 6506 -Action Block

ufw

sudo ufw deny 6506/udp