---
title: backend.socket.tcpi_segs_in
summary: null
url: >-
  https://www.fastly.com/documentation/reference/vcl/variables/backend-connection/backend-socket-tcpi-segs-in
---

**Type:** INTEGER  
**Access:** read-only

**Available in:** fetch

Received SYN are accounted on the listener, but sent SYNACK are not accounted.