It sounds like you're dealing with a classic DNS regional resolution or misconfiguration problem—S3 static site domain binding can often trip up users with hidden details, especially when some users can access the site while others can't. Let's break down the most likely causes and fixes step by step:

1. Verify Your DNS Record Points to the Correct S3 Endpoint #

This is the most common culprit here:

• You mentioned that pinging your domain returns an IP, but accessing that IP shows the default S3 landing page. That means your DNS record is pointing to the S3 REST API endpoint (e.g., example.com.s3.amazonaws.com) instead of the static website hosting endpoint (e.g., example.com.s3-website-us-east-1.amazonaws.com). These are two distinct endpoints with different IPs—only the static site endpoint serves your website content.
• To fix this:
  1. Go to your S3 console, open the example.com bucket, navigate to the Static website hosting tab, and copy the endpoint URL listed under "Bucket website endpoint".
  2. In Namecheap's DNS settings:
     • For www.example.com: Set a CNAME record pointing directly to that static site endpoint.
     • For the root domain example.com: If Namecheap supports alias records (some providers call this "CNAME flattening"), use an alias record to point to the static site endpoint. If alias records aren't available, you can use A records pointing to the IPs of the static site endpoint—but note that S3 static site IPs can change over time, so this isn't a long-term solution (consider switching to Route 53 or a DNS provider that supports root-domain CNAMEs if possible).

2. Check DNS Cache & Regional Resolution Differences #

Since your boyfriend can access the site but you and your mother can't, this points to inconsistent DNS resolution across networks/regions:

• On your device and your mother's device, run nslookup example.com or dig example.com and compare the returned IPs with what your boyfriend gets. If your results show the REST endpoint IP instead of the static site IP, your local DNS cache or ISP's DNS server hasn't updated to the new records (even 48 hours can sometimes be too slow for certain ISPs with long TTL settings).
• Test by switching your device's DNS server to a public one like Google's 8.8.8.8 or Cloudflare's 1.1.1.1, then clear your browser cache again and try accessing the site. This bypasses your ISP's cached DNS records.

3. Validate Bucket Redirect & Permissions #

Double-check your www.example.com bucket's redirect configuration:

• In the www.example.com bucket's Static website hosting settings, ensure you've selected "Redirect requests for an object", set the target domain to example.com (or the root domain's static site endpoint), and matched the protocol (HTTP/HTTPS) to your main site's setup.
• Also confirm that AWS's Block public access settings are disabled for both buckets: Go to each bucket's Permissions tab, check the "Block public access (bucket settings)" section, and make sure all four toggle options are turned off. Even if your bucket policy allows public read, these block settings can override it.

4. Rule Out HTTPS Configuration Issues (If Applicable) #

If you're using HTTPS for your custom domain:

• Ensure your SSL certificate covers both example.com and www.example.com (if you're using AWS Certificate Manager, make sure you requested a wildcard certificate or included both domains).
• If you're using a CDN like Cloudflare, verify that the SSL mode is set correctly (e.g., "Flexible" if your S3 site uses HTTP, or "Strict" if you've configured HTTPS directly on S3 via CloudFront). Mismatched SSL settings can cause connection timeouts or errors for some users.

内容的提问来源于stack exchange，提问作者ecrb