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Port 11001 (metasys)

IANA assigns port 11001 to metasys: Metasys.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
metasys TCP Metasys Tobin Schuster -
metasys UDP Metasys Tobin Schuster -

Check what is listening on port 11001

Linux: is anything listening on TCP 11001?
sudo ss -tlnp 'sport = :11001'
Linux: UDP 11001
sudo ss -ulnp 'sport = :11001'
Linux / macOS: which process owns the port
sudo lsof -nP -i :11001
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':11001 '
Windows (Command Prompt)
netstat -ano | findstr :11001
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 11001 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 11001
From Windows
Test-NetConnection HOST -Port 11001
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 11001

Block port 11001 in the firewall

ufw
sudo ufw deny 11001/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 11001 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 11001 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 11001' -Direction Inbound -Protocol TCP -LocalPort 11001 -Action Block
ufw
sudo ufw deny 11001/udp
iptables
sudo iptables -A INPUT -p udp --dport 11001 -j DROP
nftables
sudo nft add rule inet filter input udp dport 11001 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 11001' -Direction Inbound -Protocol UDP -LocalPort 11001 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.