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Port 4016 (talarian-mcast2)

IANA assigns port 4016 to talarian-mcast2: Talarian Mcast.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
talarian-mcast2 TCP Talarian Mcast - -
talarian-mcast2 UDP Talarian Mcast - -

Check what is listening on port 4016

Linux: is anything listening on TCP 4016?
sudo ss -tlnp 'sport = :4016'
Linux: UDP 4016
sudo ss -ulnp 'sport = :4016'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4016
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4016 '
Windows (Command Prompt)
netstat -ano | findstr :4016
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4016 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4016
From Windows
Test-NetConnection HOST -Port 4016
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 4016

Block port 4016 in the firewall

ufw
sudo ufw deny 4016/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4016 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4016 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4016' -Direction Inbound -Protocol TCP -LocalPort 4016 -Action Block
ufw
sudo ufw deny 4016/udp
iptables
sudo iptables -A INPUT -p udp --dport 4016 -j DROP
nftables
sudo nft add rule inet filter input udp dport 4016 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 4016' -Direction Inbound -Protocol UDP -LocalPort 4016 -Action Block

Related ports

4014taiclock4015talarian-mcast14017talarian-mcast34018talarian-mcast4

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.