Port 3016 (notify-srvr, notify_srvr)

IANA assigns port 3016 to notify-srvr, notify_srvr: Notify Server IANA assigned this well-formed service name as a replacement for "notify_srvr"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

notify-srvr TCP Notify Server IANA assigned this well-formed service name as a replacement for "notify_srvr". Hugo Parra -

notify_srvr TCP Notify Server
This entry is an alias to "notify-srvr". This entry is now historic, not usable for use with many common service discovery mechanisms. Hugo Parra -

notify-srvr UDP Notify Server IANA assigned this well-formed service name as a replacement for "notify_srvr". Hugo Parra -

notify_srvr UDP Notify Server
This entry is an alias to "notify-srvr". This entry is now historic, not usable for use with many common service discovery mechanisms. Hugo Parra -

Check what is listening on port 3016

Linux: is anything listening on TCP 3016?

sudo ss -tlnp 'sport = :3016'

Linux: UDP 3016

sudo ss -ulnp 'sport = :3016'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3016

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3016 '

Windows (Command Prompt)

netstat -ano | findstr :3016

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3016 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3016

From Windows

Test-NetConnection HOST -Port 3016

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

nc -vzu -w 5 HOST 3016

Block port 3016 in the firewall

ufw

sudo ufw deny 3016/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3016 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3016 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3016' -Direction Inbound -Protocol TCP -LocalPort 3016 -Action Block

ufw

sudo ufw deny 3016/udp