The domain troubleshooting guide can help with most custom domain configuration issues. You might be able to use that guide to solve it before a human is available to help you. Then you can come back here and share the answer for bonus points.

https://vercel.com/docs/projects/domains/troubleshooting

You can also use v0 to narrow down the possibilities.

Can you have the user run the vercel-debug script? I know that might be inconvenient, but it’s the best way for us to identify whether the problem is related to their network configuration, Internet service provider, or another factor outside of Vercel’s infrastructure (there are no blocks in place to prevent users from accessing the site from our end).

I've sent a DM to you with the script and instructions

It appears to be a network connectivity issue related to your internet service provider. You said VPN works and the script showed that DNS resolution works. SSL certificate is valid ( i just checked again to be sure).

However, when trying to connect you see "connection reset by peer". There are also DNS inconsistencies, which can indicate ISP-level DNS manipulation or filtering.

Since this works with VPN, your ISP might be blocking or throttling connections to some international servers. You can contact your ISP to request help with that. Or you could try using different DNS servers, like Google Public DNS, in your network settings.

This is unfortunately a common issue in some regions where ISPs have restrictions on some international services. The good news is that the domain and Vercel configuration appear to be working correctly based on your debug output.

Hi @arsalanstack! 🔔

This thread's been quiet for a while. If you're still facing issues, please share any relevant details (logs, screenshots, error messages) so we can take another look!