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Port 16000 (fmsas)

IANA assigns port 16000 to fmsas: Administration Server Access.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
fmsas TCP Administration Server Access Mark Davidson -

Registry dates for this port: registered 2010-10-06.

Check what is listening on port 16000

Linux: is anything listening on TCP 16000?
sudo ss -tlnp 'sport = :16000'
Linux / macOS: which process owns the port
sudo lsof -nP -i :16000
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':16000 '
Windows (Command Prompt)
netstat -ano | findstr :16000
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 16000 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 16000
From Windows
Test-NetConnection HOST -Port 16000

Block port 16000 in the firewall

ufw
sudo ufw deny 16000/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 16000 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 16000 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 16000' -Direction Inbound -Protocol TCP -LocalPort 16000 -Action Block

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159982ping15999programmar16001fmsascon16002gsms

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