ContributionsMost RecentMost LikesSolutionsRe: Is my connection using CGNAT? I know it's a bit late. But I thought I reply with an straight forward answer to this. No. Virgin Media does not use CGNAT for fiber optic. I know this as I had no issues port forwarding my plex streaming and pc for Web hosting. If you are having issues, consult a pc network advisor or YouTube videos.