Port 4846 (contamac-icm, contamac_icm)

IANA assigns port 4846 to contamac-icm, contamac_icm: Contamac ICM Service IANA assigned this well-formed service name as a replacement for "contamac_icm"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

contamac-icm TCP Contamac ICM Service IANA assigned this well-formed service name as a replacement for "contamac_icm". Abdullah Obeid -

contamac_icm TCP Contamac ICM Service
This entry is an alias to "contamac-icm". This entry is now historic, not usable for use with many common service discovery mechanisms. Abdullah Obeid -

contamac-icm UDP Contamac ICM Service IANA assigned this well-formed service name as a replacement for "contamac_icm". Abdullah Obeid -

contamac_icm UDP Contamac ICM Service
This entry is an alias to "contamac-icm". This entry is now historic, not usable for use with many common service discovery mechanisms. Abdullah Obeid -

Registry dates for this port: registered 2008-03-20.

Check what is listening on port 4846

Linux: is anything listening on TCP 4846?

sudo ss -tlnp 'sport = :4846'

Linux: UDP 4846

sudo ss -ulnp 'sport = :4846'

Linux / macOS: which process owns the port

sudo lsof -nP -i :4846

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':4846 '

Windows (Command Prompt)

netstat -ano | findstr :4846

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4846 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 4846

From Windows

Test-NetConnection HOST -Port 4846

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

nc -vzu -w 5 HOST 4846

Block port 4846 in the firewall

ufw

sudo ufw deny 4846/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 4846 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 4846 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 4846' -Direction Inbound -Protocol TCP -LocalPort 4846 -Action Block

ufw

sudo ufw deny 4846/udp