Why Uniqlo Supplier Portal Resets Connections on Sequoia
Uniqlo’s supplier and vendor portal is hosted on Amazon Web Services (AWS) with CloudFront as the CDN layer. The portal enforces TLS 1.3 with ECH for all authenticated sessions. When suppliers access the portal from macOS Safari on networks with SSL inspection (common in Japan, China, and Southeast Asia), 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, meaning that when the ECH-enabled handshake fails, there is no fallback path and the connection terminates immediately.
Browser Integrity Sync on AWS CloudFront Infrastructure
Uniqlo’s supplier portal uses browser integrity sync across AWS CloudFront’s global edge network. When the TLS handshake is interrupted, the integrity sync fails, and AWS’s security layer blocks the supplier’s access, requiring re-authentication.
Fixing Uniqlo Supplier Portal Connection Resets
Using Chrome with ECH Flags
Download Chrome → modify the shortcut target to include --disable-ECH. Launch Chrome and access Uniqlo Supplier Portal. The flag forces Chrome to signal TLS 1.2 preference to CloudFront, potentially triggering a TLS 1.2 fallback.
Using VPN with Japan or Singapore Endpoints
Uniqlo’s AWS CloudFront configuration is optimized for Japan and Southeast Asia traffic. Use a VPN with endpoints in Tokyo or Singapore to route your traffic through ISP infrastructure that supports TLS 1.3 with ECH in those regions.
Clearing Browser State for Uniqlo
Open Safari → Clear History → All History. Then Settings → Privacy → Manage Website Data → remove all Uniqlo entries. Restart Safari and access the supplier portal with a fresh TLS session.
Call to Action
Use the webs.ninja network lab to run a TLS handshake diagnostic for Uniqlo’s supplier portal. The diagnostic identifies whether the reset is caused by your ISP’s gateway, a CloudFront edge node failure, or Uniqlo’s AWS infrastructure, directing the fix to the correct layer.