Configuring Backend Firewalls to Allow NodeBalancer Traffic
My NodeBalancer is not able to reach the private IP address of one of my backend Linodes.
I've allowed inbound connections from the NodeBalancer's public IP address within my backend's firewall, but it still isn't able to connect to the backend Linode. Any idea why?
As mentioned in our NodeBalancer Reference Guide, our NodeBalancers communicate with their backends over a private network. As such, you'd want to allow connections for the NodeBalancer's private IP address in your backends' firewalls.
It's important to note that while your NodeBalancer's public IP address will never be altered, its private IP address may change over time. To ensure that your NodeBalancer will always be able to communicate with its backends over the private network, you'll want to allow connections for the entire IP address range that we use for NodeBalancers.