Bug ID 1024225: BIG-IP sends "Transfer-Encoding: chunked" to http/2 client after HEAD request

Last Modified: May 29, 2024

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6

Fixed In:
17.0.0,,, 14.1.5

Opened: Jun 09, 2021

Severity: 3-Major


BIG-IP proxying http2 -> http1.1. In response to a HEAD request, pool member sends response with "Transfer-Encoding: chunked" header without chunked payload. BIG-IP sends "Transfer-Encoding: chunked" header back to http2 client which generates RST_STREAM, PROTOCOL_ERROR. According to RFC 7450 a proxy SHOULD remove such headers.


Http2 connection is reset


1) H2 <-> H1 is configured on virtual server 2) HEAD request over http2->http1.1 gateway getting chunked response.


iRule to remove "Transfer-Encoding: Chunked" header from response.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips