Question

what is the purpose of network 10.17.0.0/16 on eth0?

while configuring firewall rules for a new (ubuntu 18.04 in nyc3) droplet today, i noticed that the output of route (below) shows three networks instead of the normal two (public, private).

can anyone tell me why the network 10.17.0.0 exists in our droplets?

104.131.0.0 - public 10.132.0.0 - private 10.17.0.0 - ???

root@104:~# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         _gateway        0.0.0.0         UG    0      0        0 eth0
10.17.0.0       0.0.0.0         255.255.0.0     U     0      0        0 eth0
10.132.0.0      0.0.0.0         255.255.0.0     U     0      0        0 eth1
104.131.0.0     0.0.0.0         255.255.192.0   U     0      0        0 eth0

thanks! -lee

Subscribe
Share

Submit an answer
You can type!ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

ok. got it. thanks!

so apparently, even when a droplet has no floating ip enabled at the time of it’s creation, the anchor ip will be configured for the droplet regardless, to ease the process of enabling floating ip at a later time.

Your public network interface has an “Anchor IP” associated with it for the use of a floating IP:

https://www.digitalocean.com/community/tutorials/how-to-use-floating-ips-on-digitalocean#getting-anchor-and-floating-ip-information

Thanks for the speedy reply ryanpq!

Nope, it’s just a basic droplet with private networking, so no floating IPs or load balancing. Also no backup plan, monitoring, cloud-firewall or IPv6.

Are you using any floating IPs or a load balancer with your droplet? Floating IPs will appear as another local network interface rather than an interface with the public floating ip shown.