What do I do if my traffic is blackholed?
We temporarily trigger a blackhole when a DDoS attack against a resource reaches a mitigation limit. We recommend contacting support and planning strategies to keep your resources online in the future.
Networking Support
Validated on 26 Mar 2026
My Ubuntu Droplet lost all network connectivity after a software update.
Ensure your Droplet’s public and private network interfaces are correctly named eth0 and eth1.
Are my Droplet's IP addresses static?
Addresses assigned to a Droplet remain static for the life of the Droplet.
My firewalls are not working correctly
Use this guide to gather information about your firewalls and diagnose problems.
Why is my Droplet receiving Authoritative Answer flag errors?
Our DNS recursive servers now require Authoritative Answer flags when resolving host names.
How can I allowlist the DigitalOcean metrics agent with my firewall?
Configure your firewall to allow outbound traffic on ports 80 and 443 so the DigitalOcean metrics agent can report monitoring data.
Can I have more than one domain on the same Droplet?
Yes, you can point an unlimited number of domains to a single Droplet, and you can serve multiple websites from a single Droplet.
Why is SMTP blocked?
SMTP is blocked on Droplets to prevent spam and abuse. Use a third-party email as a service provider instead.