Validators need a Sentry? What's the required architectural setup?

Hi,

I am new to Cosmos network.
I read the docs and I would like to setup a validator.
However I would like to know if for a Cosmos Validator we need to employ a setup which requires a Sentry computer.
I have seen other cryptocurrencies setup require a sentry computer in order that the node producer is never connected to the internet.
I could not find any reference in the Cosmos docs that a Sentry is required.

I would appreciate if someone has some time to clarify this for me.
Please receive my thanks in advance.

All the best,
Alex

It is not required but recommended.
The purpose is to have redundancy, and also a layer of protection.

Here’s a detailed discussion on the topic:

Sentry Node Architecture Overview Validation

Overview The Sentry Node Architecture (referred to as SNA in this document) is an infrastructure example for DDoS mitigation on Gaia / Cosmos Hub network validator nodes. Disclaimer It is important to understand that this is only one example of solving DDoS mitigation for validator nodes. For diversity in the network, validators are encouraged to implement their own solutions. Each validator is responsible for their own solution. This example might be missing crucial security features that need…