AWS Gateway Load Balancer Introduces TCP Reset for Faster Connection Failure Recovery

Gateway Load Balancer added TCP Reset feature to reduce traffic disruption by enabling quicker detection and recovery from unhealthy targets.

By Clara Morgan · Editorial pseudonym · 2026-09-03 · 1 min read

AI-ASSISTED REPORTING · RETROSPECTIVE ARCHIVE

Retrospective edition: 2026-09-03. Source published: 2026-09-03. Added to this archive: 2026-11-03. This briefing was prepared later from the linked announcement; it was not published on this website on the historical edition date.

AWS Gateway Load Balancer enhanced failure handling by supporting TCP Reset packets when targets become unhealthy, deregister, or idle timeout expires. This accelerates the recognition of failed TCP connections by endpoints, cutting recovery time from minutes to seconds, and minimizing traffic interruptions.

Previously, fail-open behavior forwarded traffic to unhealthy targets causing prolonged outages due to TCP retries. The new TCP Reset capability, configurable per target group and region-wide, improves network responsiveness with no additional cost, though it is off by default to maintain compatibility with existing deployments.

Source & further reading

AWS Gateway Load Balancer now supports TCP Reset for faster failure recovery ↗

Source published 2026-09-03. This report was prepared with AI assistance from the linked primary-source material. Claims and limitations should be checked against the original announcement or research.