Does DartNode block ports?

By default, DartNode does not block any ports — you're free to use any port you need. However, we do monitor for abuse and maintain protections to ensure network health.

⚠️ When Are Ports Blocked?

If your assigned IP address is listed on one or more of the blacklists we monitor, DartNode will automatically filter/block all outbound traffic on the following ports until the issue is resolved:

🔌 25     📤 SMTP (Email sending)  
🔌 137    📡 NetBIOS Name Service  
🔌 138    📡 NetBIOS Datagram Service  
🔌 139    📡 NetBIOS Session Service  
🔌 445    🧷 SMB over TCP  
🔌 1688   🔐 KMS Activation  
🔌 17     🔁 QOTD (Quote of the Day)  
🔌 19     🔁 Chargen (Character Generator)  
🔌 1900   📺 SSDP (UPnP Discovery)  
🔌 53413  📦 BitTorrent-related  
🔌 11211  💾 Memcached

🔄 How Often Are Filters Updated?

Our filter list is updated every hour, automatically.

We cannot manually override these blocks unless a compelling reason is provided — this is to protect our network and customers from abuse or potential compromise.

❓ Have Questions?

Reach out to our support team anytime at
📨 support@dartnode.com