Can I use Cloudflare 1.1.1.1 Portable with a VPN?

Yes, you can generally use Cloudflare 1.1.1.1 Portable with a VPN. Some VPNs have built-in DNS settings that override your system-wide DNS configuration. If you're using a VPN that manages DNS, you might need to configure the VPN app to use 1.1.1.1 as its DNS server, or adjust the VPN settings to allow Cloudflare 1.1.1.1 to function correctly. Some VPNs have built-in Cloudflare integration that simplifies this.