So it looks like the -H makes it a HTTP/1.1 request. So my theory was that HTTP/1.1 requests make www.timewarnercable.com choke, but 1.1 requests work fine with curl and wget.
root@nagios:/usr/lib/nagios/plugins# ./check_http -H www.timewarnercable.com -v GET / HTTP/1.1 User-Agent: check_http/v1.4.15 (nagios-plugins 1.4.15) Connection: close Host: www.timewarnercable.com CRITICAL - Socket timeout after 10 seconds root@nagios:/usr/lib/nagios/plugins# curl -v -1 www.timewarnercable.com * About to connect() to www.timewarnercable.com port 80 (#0) * Trying 2001:1998:840:b001::7... connected * Connected to www.timewarnercable.com (2001:1998:840:b001::7) port 80 (#0) > GET / HTTP/1.1 > User-Agent: curl/7.21.0 (x86_64-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o zlib/1.2.3.4 libidn/1.15 libssh2/1.2.5 > Host: www.timewarnercable.com > Accept: */* > < HTTP/1.1 301 Moved Permanently < Date: Fri, 29 Aug 2014 18:22:50 GMT < Server: Apache < Location: http://www.timewarnercable.com/en/residential.html < Cache-Control: max-age=1800 < Expires: Fri, 29 Aug 2014 18:52:50 GMT < Content-Length: 331 < Keep-Alive: timeout=10, max=586 < Connection: Keep-Alive < Content-Type: text/html; charset=iso-8859-1 < Set-Cookie: TWC-COOKIE-webcms-twc-sg=BPEGKIEE; Path=/ < <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>301 Moved Permanently</title> </head><body> <h1>Moved Permanently</h1> <p>The document has moved <a href="http://www.timewarnercable.com/en/residential.html";>here</a>.</p> <hr> <address>Apache Server at www.timewarnercable.com Port 80</address> </body></html> * Connection #0 to host www.timewarnercable.com left intact * Closing connection #0 root@nagios:/usr/lib/nagios/plugins# root@nagios:/usr/lib/nagios/plugins# wget -6 -vvvv www.timewarnercable.com --2014-08-29 13:23:45-- http://www.timewarnercable.com/ Resolving www.timewarnercable.com... 2001:1998:840:b001::7 Connecting to www.timewarnercable.com|2001:1998:840:b001::7|:80... connected. HTTP request sent, awaiting response... 301 Moved Permanently Location: http://www.timewarnercable.com/en/residential.html [following] --2014-08-29 13:23:45-- http://www.timewarnercable.com/en/residential.html Reusing existing connection to www.timewarnercable.com:80. HTTP request sent, awaiting response... 200 OK Length: 101218 (99K) [text/html] Saving to: âindex.html.3â 100%[======================================================================= ==================================>] 101,218 --.-K/s in 0.09s 2014-08-29 13:23:46 (1.03 MB/s) - âindex.html.3â root@nagios:/usr/lib/nagios/plugins# Frank -----Original Message----- From: Help [mailto:help-bounces+frnkblk=iname....@monitoring-plugins.org] On Behalf Of zep Sent: Friday, August 29, 2014 1:14 PM To: help@monitoring-plugins.org Subject: Re: Monitoring IPv6 website curiouser and curiouser.. [root@deathstar plugins]# ./check_http -6 www.qwest.com -v GET / HTTP/1.0 User-Agent: check_http/v1.4.16 (nagios-plugins 1.4.16) Connection: close http://www.qwest.com:80/ is 376 characters STATUS: HTTP/1.1 200 OK **** HEADER **** Date: Fri, 29 Aug 2014 18:08:02 GMT Server: Apache Set-Cookie: TLTSID=6A8055762FA7102F007B8441495A6D11; Path=/ HostName: vlamardmzpd24.centurytel.com Accept-Ranges: bytes Cache-Control: max-age=0 Expires: Fri, 29 Aug 2014 18:08:02 GMT Vary: Accept-Encoding,User-Agent Content-Length: 17 Connection: close Content-Type: text/html **** CONTENT **** Hello from .42! HTTP OK: HTTP/1.1 200 OK - 376 bytes in 0.174 second response time |time=0.173939s;;;0.000000 size=376B;;;0 [root@deathstar plugins]# ./check_http -6 -H www.qwest.com -v GET / HTTP/1.1 User-Agent: check_http/v1.4.16 (nagios-plugins 1.4.16) Connection: close Host: www.qwest.com http://www.qwest.com:80/ is 589 characters STATUS: HTTP/1.1 301 Moved Permanently **** HEADER **** Date: Fri, 29 Aug 2014 18:08:08 GMT Server: Apache Set-Cookie: TLTSID=6E8BAB5C2FA7102F0019ED7BCA66AF5C; Path=/; Domain=.qwest.com HostName: vlamardmzpd24.centurytel.com Location: http://www.centurylink.com/ Vary: Accept-Encoding Content-Length: 235 Connection: close Content-Type: text/html; charset=iso-8859-1 **** CONTENT **** <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>301 Moved Permanently</title> </head><body> <h1>Moved Permanently</h1> <p>The document has moved <a href="http://www.centurylink.com/";>here</a>.</p> </body></html> HTTP OK: HTTP/1.1 301 Moved Permanently - 589 bytes in 0.179 second response time |time=0.178524s;;;0.000000 size=589B;;;0 301 for a -H and 200 for a regular request. clearly one is doing it quite differently from the other... not sure which is the 'right' way. On 08/29/2014 01:56 PM, Frank Bulk wrote: > I tested that theory a few months ago, but alas, that's not it, as 301 does > work just fine for www.qwest.com, but not for www.timerwarnercable.com > > root@nagios:/usr/lib/nagios/plugins# ./check_http -6 -H www.qwest.com > HTTP OK: HTTP/1.1 301 Moved Permanently - 589 bytes in 0.163 second response > time |time=0.163363s;;;0.000000 size=589B;;;0 > root@nagios:/usr/lib/nagios/plugins# > root@nagios:/usr/lib/nagios/plugins# ./check_http -6 -H > www.timewarnercable.com > CRITICAL - Socket timeout after 10 seconds > root@nagios:/usr/lib/nagios/plugins# > > We may need a NAGIOS developer who understands the check_http code to chime > in. > > Regards, > > Frank > > -----Original Message----- > From: Help [mailto:help-bounces+frnkblk=iname....@monitoring-plugins.org] On > Behalf Of zep > Sent: Friday, August 29, 2014 9:15 AM > To: help@monitoring-plugins.org > Subject: Re: Monitoring IPv6 website > > > On 08/29/2014 09:32 AM, Frank Bulk wrote: >> But there is! Try with a typical webbrowser or wget! >> >> root@nagios:/tmp# wget -6 www.timewarnercable.com >> --2014-08-29 08:31:57-- http://www.timewarnercable.com/ >> Resolving www.timewarnercable.com... 2001:1998:840:b001::7 >> Connecting to www.timewarnercable.com|2001:1998:840:b001::7|:80... >> connected. >> HTTP request sent, awaiting response... 301 Moved Permanently > ---------------------------------------------------^^^^^^^^^^^^^^^ >> Location: http://www.timewarnercable.com/en/residential.html >> [following] >> --2014-08-29 08:31:57-- >> http://www.timewarnercable.com/en/residential.html >> Reusing existing connection to www.timewarnercable.com:80. >> HTTP request sent, awaiting response... 200 OK >> Length: 101218 (99K) [text/html] >> Saving to: âindex.htmlâ >> > I think you may have answered your own question. > > it would seem to me that check_http only considers http response codes > in the 200 range to be successful and valid, whereas a redirect to a > different server isn't thought to be a successful test/connection. > I'd have to play with some web servers to confirm that notion > >
