Understanding Amazon Seller Central Ads Connection Resets
Amazon Seller Central’s advertising module (Sponsored Products, Sponsored Brands) is hosted on AWS with CloudFront as the CDN layer. The platform uses TLS 1.3 with ECH for all authenticated sessions. When sellers access the advertising dashboard from macOS Safari on networks with SSL inspection, the ISP gateway resets the ECH-enabled ClientHello, causing the TLS handshake to fail.
AWS CloudFront’s TLS configuration does not support TLS 1.2 fallback for authenticated sessions. When the ECH-enabled handshake fails, there is no fallback path and the connection terminates immediately with ERR_CONNECTION_RESET.
Browser Integrity Sync on Amazon’s Advertising Infrastructure
Amazon Seller Central Ads uses browser integrity sync across AWS CloudFront’s global edge network to validate seller advertising sessions and prevent unauthorized ad spend. When the TLS handshake is interrupted, the integrity sync fails, and Amazon’s security layer blocks the seller’s access, requiring re-authentication.
Fixing Amazon Seller Central Ads Connection Resets
Using Chrome with ECH Flags
Download Chrome → modify the shortcut target to include --disable-ECH. Launch Chrome with this flag and access Amazon Seller Central → Advertising. The flag forces Chrome to signal TLS 1.2 preference to CloudFront, potentially triggering a TLS 1.2 fallback.
Disabling SSL Inspection for Amazon Domains
Configure your network proxy to bypass Amazon advertising domains. In macOS, navigate to System Settings → Network → Wi-Fi → Details → Proxy. Add *.amazon.com, *.amazon.co.uk, *.advertising.amazon.com to the bypass list.
Clearing Amazon Browser Data
Open Safari → Clear History → All History. Then Settings → Privacy → Manage Website Data → remove all Amazon entries. Restart Safari and access the advertising dashboard with a fresh TLS session.
Call to Action
Use the webs.ninja network lab to verify connectivity to Amazon Seller Central Ads endpoints. The diagnostic identifies whether the reset is caused by your ISP’s gateway, a CloudFront edge node failure, or Amazon’s AWS infrastructure, directing the fix to the correct layer.