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From <>
Subject RE: [users@httpd] Apache 2.2.32 failing F5 health check
Date Tue, 07 Feb 2017 01:40:00 GMT
broken apache httpd version 2.2.32:
openssl s_client -connect <server>:<port> -pause
when paused input this.
GET /login/healthcheck/content_check.wecv HTTP/1.0
Host: <server name>

You get bad request back from apache httpd
HTTP/1.1 400 Bad Request
Working  apache httpd version 2.2.31:
openssl s_client -connect <server name>:<port> -pause
when paused input this.
GET /login/healthcheck/content_check.wecv HTTP/1.0
Host: <server name>

You get content_check.wecv page from webserver with http code 200.

Bharath Kolla

From: Daniel []
Sent: Monday, February 06, 2017 1:50 PM
To: <>
Subject: Re: [users@httpd] Apache 2.2.32 failing F5 health check

Oh really? Enable mod_dumpio and show us the GET from your F5 "pings".

2017-02-06 21:34 GMT+01:00 <<>>:
This issue is different from the CR LF issue. We checked for any delimiters/spaces etc. The
F5 health checks work fine with 2.2.31 on the same server, without any change in the configuration,
but when we upgrade to 2.2.32, apache reports a 400 error.

Bharath Kolla

-----Original Message-----
From: Eric Covener [<>]
Sent: Saturday, February 04, 2017 5:00 PM
Subject: Re: [users@httpd] Apache 2.2.32 failing F5 health check

On Sat, Feb 4, 2017 at 4:56 PM,  <<>>
> We recently upgraded to Apache 2.2.32 and are facing issues with F5
> health check. The openssl s_client from F5 to check Apache web
> server’s health is being returned by the 2.2.32 server as 400 error.
> We don’t see the issue with 2.2.31 however. The application can be
> accessed with web server listen address, but when accessed through the
> VIP, it sends a 400. Any help in debugging this issue will be much appreciated.

Someone recently reported a subset of their F5 health checks were using LF line endings instead
of CR LF.

Eric Covener<>

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Daniel Ferradal
IT Specialist

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