On 16.06.2011 08:35, Moshe Ben-Shoham wrote:
> But this is not the case - the request was perfectly OK, just took the 
> backend server too long to handle (note that I am less worried about bogus 
> requests because this Apache is behind firewall and only serves requests 
> coming from another component in the system, which is under our control).
> 
> I would like to focus on my original question: Why did Apache return 200 to 
> the client in case of proxy timeout?

It could be because of CVE-2010-2068, which was fixed in 2.2.16. Please
try again with 2.2.latest.

You should also fix your configuration before restesting. Read the most
recent online docs about workers in mod_proxy carefully.

I expect that your ProxySet seetings are not functional the way you
configured them.

Regards,

Rainer

> From: Jeroen Geilman [mailto:jer...@adaptr.nl]
> Sent: Wednesday, June 15, 2011 10:19 PM
> To: users@httpd.apache.org
> Subject: Re: [users@httpd] Apache returns 200 to client in case of proxy 
> timeout
> 
> On 06/15/2011 09:32 AM, Moshe Ben-Shoham wrote:
> Hi,
> 
> Thanks for the comment about the ProxyMatch syntax. I will look into it, 
> although it works.
> 
> Regarding the proxy hit, I know for sure that the request should be proxied 
> because is usually does. It matches the following rewrite rule (again, URL 
> was changed):
> 
>   RewriteRule  ^/x/y(.*)  http://localhost:9003$1           [P]
> 
> In addition, every time the timeout occurs, I see the following message in 
> the Apache error log, exactly 300 seconds after the request arrives:
> 
> [Sat Jun 11 09:00:54 2011] [error] [client 192.168.131.11] (OS 10060)A 
> connection attempt failed because the connected party did not properly 
> respond after a period of time, or established connection failed because 
> connected host has failed to respond. : proxy: error reading status line from 
> remote server localhost
> 
> 
> It means what it says.
> 
> Your rule allows bogus constructions like http://localhost:9003002001/foobar/.
> 
> ALWAYS include slashes at ambiguous locations!
> 
> 
> 
> 
> Thanks,
> Moshe Ben Shoham
> Perfecto Mobile
> 
> From: Jeroen Geilman [mailto:jer...@adaptr.nl]
> Sent: Wednesday, June 15, 2011 10:18 AM
> To: users@httpd.apache.org<mailto:users@httpd.apache.org>
> Subject: Re: [users@httpd] Apache returns 200 to client in case of proxy 
> timeout
> 
> On 06/15/2011 08:52 AM, Moshe Ben-Shoham wrote:
> Hi,
> 
> We're using Apache 2.2.15, with mod_proxy_http for proxying requests to 
> backend processes.
> 
> Here's the relevant configuration we use:
> 
>   <ProxyMatch  http://localhost:9001>
> 
> That is not valid syntax for ProxyMatch, which requires a regular expression.
> Please see http://httpd.apache.org/docs/2.2/mod/mod_proxy.html#proxymatch for 
> details.
> 
> 
>     ProxySet smax=5 max=20 ttl=120 keepalive=On
>   </ProxyMatch>
> 
> Hence, the value of "timeout" is 300 seconds. When the timeout occurs, we see 
> Apache returning 200 to the client (just changed the URL):
> 
> 1181: 192.168.131.11 - - [11/Jun/2011:10:58:53 +0100] "POST /x/y/z HTTP/1.1" 
> 200 - 300515625
> 
> 
> No way to know that the proxy is being hit.
> 
> 
> 
> 
> 
> Is that the expected behavior? I would expect an error code, maybe 504.
> 
> Thanks,
> Moshe Ben Shoham
> Perfecto Mobile

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