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Port 38201 (galaxy7-data)

IANA assigns port 38201 to galaxy7-data: Galaxy7 Data Tunnel.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
galaxy7-data TCP Galaxy7 Data Tunnel Tatham Oddie -
galaxy7-data UDP Galaxy7 Data Tunnel Tatham Oddie -

Registry dates for this port: registered 2002-09.

Check what is listening on port 38201

Linux: is anything listening on TCP 38201?
sudo ss -tlnp 'sport = :38201'
Linux: UDP 38201
sudo ss -ulnp 'sport = :38201'
Linux / macOS: which process owns the port
sudo lsof -nP -i :38201
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':38201 '
Windows (Command Prompt)
netstat -ano | findstr :38201
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 38201 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 38201
From Windows
Test-NetConnection HOST -Port 38201
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 38201

Block port 38201 in the firewall

ufw
sudo ufw deny 38201/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 38201 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 38201 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 38201' -Direction Inbound -Protocol TCP -LocalPort 38201 -Action Block
ufw
sudo ufw deny 38201/udp
iptables
sudo iptables -A INPUT -p udp --dport 38201 -j DROP
nftables
sudo nft add rule inet filter input udp dport 38201 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 38201' -Direction Inbound -Protocol UDP -LocalPort 38201 -Action Block

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38001ivs-insertion38002cresco-control, crescoctrl-disc38202fairview38203agpolicy

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