[Nagiosplug-devel] [ nagiosplug-Bugs-3434735 ] check_http failing with proxy server

Bryan Irvine bryair01 at noa.nintendo.com
Thu Jun 28 03:47:05 CEST 2012

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I pasted the exact same command you used and it worked on my proxy.

The name difference is because I'm using it with zenoss, which includes check_http from 1.4.13 in the same dir.
$ /opt/zenoss/libexec/check_http_proxy -I proxysg -p 8080 -u http://www.google.com.au/ -t 40 -H 74.125.237.16
HTTP OK: HTTP/1.1 200 OK - 14679 bytes in 0.131 second response time |time=0.130708s;;;0.000000 size=14679B;;;0

My guess is that the proxy is trying to get the remote site also using port 8080.

See if this works for you. 
./check_http -I 10.1.0.228 -p 8080 -u http://www.google.com.au/ -t 40 -H 74.125.237.16:80


-----Original Message-----
From: SourceForge.net [mailto:noreply at sourceforge.net] 
Sent: Wednesday, June 27, 2012 1:31 AM
To: SourceForge.net
Subject: [Nagiosplug-devel] [ nagiosplug-Bugs-3434735 ] check_http failing with proxy server

Bugs item #3434735, was opened at 2011-11-07 18:21
Message generated for change (Comment added) made by piccilli
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=397597&aid=3434735&group_id=29880

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: Interface (example)
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Stuart Bryson (bigc9heese)
Assigned to: Holger Weiss (hweiss)
Summary: check_http failing with proxy server

Initial Comment:
I've been using v1.4.11 of the check_http plugin to check the Internet via the proxy as such:
./check_http -I 10.1.0.228 -p 8080 -u http://www.google.com.au/ -t 40 -H 74.125.237.16
This worked great, see below:

GET http://www.google.com.au/ HTTP/1.0
User-Agent: check_http/v1861 (nagios-plugins 1.4.11)
Connection: close
Host: 74.125.237.16


http://10.1.0.228:8080http://www.google.com.au/ is 10873 characters
STATUS: HTTP/1.1 200 OK
**** HEADER ****
Via: 1.1 companyscm
Date: Tue, 08 Nov 2011 02:20:04 GMT
Expires: -1
Cache-Control: private, max-age=0
Content-Type: text/html; charset=ISO-8859-1
Server: gws
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN
Connection: close
**** CONTENT ****
(...)

When I upgraded to v1.4.15 - it fails:

GET http://www.google.com.au/ HTTP/1.1
User-Agent: check_http/v1.4.15 (nagios-plugins 1.4.15)
Connection: close
Host: 74.125.237.16:8080

http://10.1.0.228:8080http://www.google.com.au/ is 232 characters
STATUS: HTTP/1.1 503 Service Unavailable
**** HEADER ****
Retry-After: 10
**** CONTENT ****
<HTML><HEAD><TITLE>502 Bad Gateway</TITLE>
<H2>Bad Gateway</H2>
<H4>The following error occurred:</H4>
<H4>
The host name was not found during the DNS lookup
</H4>
</HTML>

HTTP CRITICAL: HTTP/1.1 503 Service Unavailable - 232 bytes in 21.016 second response time |time=21.016469s;;;0.000000 size=232B;;;0

Something changed that stopped this. Is it possible to be fixed?
If it isn't a bug, please let me know what I'm doing wrong.
Thanks.

----------------------------------------------------------------------

Comment By: Leandro Piccilli (piccilli)
Date: 2012-06-27 01:28

Message:
You can try a patch I created for a similar issue:
https://sourceforge.net/mailarchive/message.php?msg_id=29399782

It adds a new option '--force-http-1.0' to use same behavior as previous
check_http versions. 

----------------------------------------------------------------------

Comment By: Ferenc Wágner (wferi)
Date: 2011-11-08 08:15

Message:
A guess: your proxy blindly tries to resolve 74.125.237.16:8080 from DNS
(notice that the newer plugin sticks the port number in the Host header).
The HTTP protocol version in the request may also make a difference.
Experiment with telnet 10.1.0.228 8080 to find out what matters for your
proxy.

----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=397597&aid=3434735&group_id=29880

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