Internal Server Error when Firefox is pointed to http://xxx.xxx.x.x/cgi-bin/FlowViewer_4.6/FV.cgi

[Paul Cliff]

When I type the following into firfox address bar http://xxx.xxx.xxx.xxx/cgi-bin/FlowViewer_4.6/FV.cgi

I receive the following error>

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, prcliff@yahoo.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
Apache/2.2.14 (Ubuntu) Server at 192.168.2.9 Port 80

Here is the error log

BEGIN failed--compilation aborted at /usr/lib/cgi-bin/FlowViewer_4.6/FV.cgi line 31.
[Tue Dec 22 11:36:36 2015] [error] [client 192.168.2.6] Premature end of script headers: FV.cgi

Here is lines 26-31 in the FV.cgi file

BEGIN EXECUTABLE STATEMENTS

use FlowViewer_Configuration;

Here is the server information -
Linux Server 2.6.32-38-generic #83-Ubuntu SMP Wed Jan 4 11:13:04 UTC 2012 i586 GNU/Linux
Ubuntu 10.04.4 LTS.

/usr/lib/apache2
group - root
owner - root
permisions 755

$ sudo chown root:root /usr/lib/cgi-bin/FlowViewer_4.6
$ sudo chown 755 /usr/lib/cgi-bin/FlowViewer_4.6

I am new to Ubuntu and apache web server.

[Joe Loiacono]

Paul -

My guess is that you have made a syntax error when configuring your environment in the FlowViewer_Configuration.pm file.

You could try 'perl -e FlowViewer_Configuration.pm' to see if that is the case. This should be done CLI in the /usr/lib/cgi-bin/FlowViewer_4.6 directory.

Joe

[Paul Cliff]

Joe,

I do not know what I am looking for, here is the syntex I entered at the CLI.

$ cd /usr/lib/cgi-bin/FlowViewer_4.6 directory
:/usr/lib/cgi-bin/FlowViewer_4.6$ perl -e FlowViewer_Configuration.pm
:/usr/lib/cgi-bin/FlowViewer_4.6$ sudo perl -e FlowViewer_Configuration.pm
[sudo] password for paul:
paul@Server:/usr/lib/cgi-bin/FlowViewer_4.6$

[Joe Loiacono]

Paul,

[Hmm SourceForge UI is not acting normally]

My mistake. The command should be:

'perl -c FlowViewer_Configuration.pm'

Also, check whether FV.cgi compiles:

'perl -c FV.cgi'

Thanks, Joe

[Paul Cliff]

Joe,

Thanks for the help. Here was the issue.

:/usr/lib/cgi-bin/FlowViewer_4.6$ perl -c FlowViewer_Configuration.pm
syntax error at FlowViewer_Configuration.pm line 70, near ""ipfix-probes_S0";"

Here is line 70 in the config
@devices = ("ipfix-probes_S0"; # for flow-tools

Change the line to:
@devices = ""; # for flow-tools

:/usr/lib/cgi-bin/FlowViewer_4.6$ perl -c FlowViewer_Configuration.pm
FlowViewer_Configuration.pm syntax OK
:/usr/lib/cgi-bin/FlowViewer_4.6$ perl -c FV.cgi
FV.cgi syntax OK

Type the following into the web browser address bar

http://192.168.2.9/cgi-bin/FlowViewer_4.6/FlowViewer.cgi

Brought me to the dash board - success

[Joe Loiacono]

Paul,

The trouble is a missing right parenthese ")".

INCORRECT: @devices = ("ipfix-probes_S0";
CORRECT: @devices = ("ipfix-probes_S0");

If you are going to use SiLK, which it looks like you are, you will have to correct the above line.

Also, SiLK doesn't like underscores ( _ ) in device names. (Unforunately I just discovered my examples have underscores ... sheesh)

Joe