Port 3017 (event-listener, event_listener)

IANA assigns port 3017 to event-listener, event_listener: Event Listener IANA assigned this well-formed service name as a replacement for "event_listener"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

event-listener TCP Event Listener IANA assigned this well-formed service name as a replacement for "event_listener". Ted Tronson -

event_listener TCP Event Listener
This entry is an alias to "event-listener". This entry is now historic, not usable for use with many common service discovery mechanisms. Ted Tronson -

event-listener UDP Event Listener IANA assigned this well-formed service name as a replacement for "event_listener". Ted Tronson -

event_listener UDP Event Listener
This entry is an alias to "event-listener". This entry is now historic, not usable for use with many common service discovery mechanisms. Ted Tronson -

Check what is listening on port 3017

Linux: is anything listening on TCP 3017?

sudo ss -tlnp 'sport = :3017'

Linux: UDP 3017

sudo ss -ulnp 'sport = :3017'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3017

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3017 '

Windows (Command Prompt)

netstat -ano | findstr :3017

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3017 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3017

From Windows

Test-NetConnection HOST -Port 3017

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

nc -vzu -w 5 HOST 3017

Block port 3017 in the firewall

ufw

sudo ufw deny 3017/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3017 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3017 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3017' -Direction Inbound -Protocol TCP -LocalPort 3017 -Action Block

ufw

sudo ufw deny 3017/udp