# Ontology Nodes

## What is a whitelist in the context of the Ontology node network？

The official **seed nodes** of the node network are considered to be a part of the whitelist.

So as to avoid synchronizing the data on a node with other nodes that may have been compromised, or are unsafe in any manner, a node can always choose to synchronize with the **official whitelisted seed nodes** of Ontology.

This can be achieved by using the following command when synchronizing a node-

```bash
./ontology --reservedfile=./peers.rsv --reservedonly
```

Here, the `peers.rsv` file contains the whitelist details.