Understanding Shopify Admin Connection Resets on Sequoia
Shopify Admin panels are fronted by AWS CloudFront with TLS 1.3 and ECH enforced at the edge. When a merchant accesses their admin panel from macOS Safari, the browser initiates a TLS 1.3 handshake with ECH. If the merchant’s ISP gateway implements SSL inspection or has a maximum segment size (MSS) limitation on TCP packets that is lower than the ECH-enabled ClientHello size, the connection is reset.
The MSS issue is particularly relevant for ISP gateways in regions with older network infrastructure, where the maximum packet size is set to 1400 bytes instead of the standard 1500 bytes. The ECH-enabled ClientHello can exceed 1400 bytes, causing the ISP gateway to drop the packet silently (without sending an ICMP Fragmentation Needed message), which results in a timeout and connection reset.
AWS CloudFront Routing Metrics and Their Role in Shopify Admin Issues
AWS CloudFront routing metrics reveal the health of the connection path between the merchant and Shopify’s CDN. When AWS CloudFront routing metrics show elevated latency or packet loss for the merchant’s region, the connection reset is infrastructure-side and no client-side fix will resolve it. However, when the metrics show normal performance but the merchant still experiences connection resets, the issue is local — ISP gateway MSS limitations or browser cache corruption.
Resolving Shopify Admin Connection Resets
Adjusting Local Network Adapter MTU
Press Win+R, type ncpa.cpl, right-click your network adapter → Properties → Configure → Advanced → MTU. Set MTU to 1400 to match the lower MSS threshold used by older ISP gateways. This ensures that all outbound packets (including ECH-enabled ClientHello messages) fit within the ISP gateway’s MSS limit and are forwarded without being dropped.
Clearing Shopify Admin Browser Cache
Open Safari → Settings → Privacy → Manage Website Data. Search for shopify.com and remove all entries. Then navigate to Safari → Clear History → All History. Restart Safari and log into Shopify Admin again. The fresh session eliminates any corrupted TLS session tickets or cache entries that may have been directing requests to a degraded CloudFront edge node.
Using a Different Network Path
If adjusting MTU does not resolve the issue, try connecting via a personal mobile hotspot or a VPN. Mobile data networks (4G/LTE) typically have higher MSS limits and do not implement SSL inspection, allowing TLS 1.3 with ECH to function without interference. A VPN encrypts all traffic and routes it through a different ISP infrastructure, bypassing the problematic gateway entirely.
Call to Action
Before adjusting MTU or clearing browser cache, check the Shopify Status Page by searching “is the platform down right now” to confirm whether Shopify is experiencing an active incident. If the platform is operational, run the webs.ninja network lab to identify whether the connection reset is coming from your ISP’s gateway, a specific CloudFront edge node, or local browser state — directing the fix to the correct layer.