Re: Python - CGI-BIN - Apache Timeout Problem

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From	Dennis Lee Bieber <wlfraed@ix.netcom.com>
Subject	Re: Python - CGI-BIN - Apache Timeout Problem
Date	Fri, 02 Mar 2012 22:35:31 -0500
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On Fri, 2 Mar 2012 13:43:11 -0800, "Sean Cavanaugh (scavanau)"
<scavanau@cisco.com> declaimed the following in
gmane.comp.python.general:

> 
> The way the code works if you want to send through the firewall (i.e.   SERVER->FIREWALL->SERVER)  I split the process into two threads.  One is listening on the egress, then I send on the ingress.  The main waits until the thread finishes (it times out after 2 seconds).  I had to do this b/c scapy (the library I used) won't let me send pcaps while I receive them.  This lets me see packets on both sides (i.e. did that sort of internet traffic go through the firewall).   The reason I think this could be a problem is when I ran a test where I sent to the firewall (rather than through it) and my program does not need to thread the webserver works fine......   
> 
> Suggestions anyone?
>

	Other than the simplistic "don't do that"...

	You may be encountering the style of situation that FTP PASSIVE mode
is most used for -- getting past a firewall that is blocking inbound
connections (as I recall, much simplified, plain FTP initiates a
connection outbound, and then the server responds by initiating a
connection back; passive mode has the server responding on the same
connection that was used for the initial outbound traffic) 

{It has been way too long since I've coded any low-level network
traffic}
-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
        wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/

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Re: Python - CGI-BIN - Apache Timeout Problem Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-03-02 22:35 -0500

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