Internet communication through a Firewall

[Alejandro Tejada]

on Fri, 24 Sep 2004
Chipp Walters wrote:
> Firewalls and proxies can be a big problem for
> software developers. 
> There is a setting called "the httpProxy" you might
> want to take a look 
> at in Rev (don't know if it exists in MC).

Sure it does! I have tested some code with it,
without good results.

> Also, the latest version of libURL supports Basic
> Authentication and 
> NTLM authentication (PC only, using our NTLM.dll).
> You need to find out 
> from your sysAdmin what type of authentication you
> are using and then 
> see if you can authenticate against it.

I suspect that the Firewall intercept every
application
that tries to communicate over the net. If the app
has permissions, then it allows the communication.

on Sat, 25 Sep 2004
david at anon.nu wrote:

> Also (which may well not be the prob in your case)
> +- may be saying the 
> obvious - it depends which port your app is using to
> communicate?  
> Standar HTTP goes over port 80 which is usually left
> open by the 
> firewall and therefore OK to use. 

So it's possible, that Metacard uses this port
to download the stack tools.metacard.com

I had to look the scripts of the MC IDE but this 
has always look to me as Brain surgery with the
patient wake up (by the way, i've read somewhere
that THIS is possible, maybe in Scientific American
or somewhere else... Ahrgg!!)

Could Richard or Wilhem or Klaus put in a new
message the script that MC IDE uses to call the 
stack "tools.metacard.com" from the internet?

> Ftp etc is another
> issue and the 
> firewall may block. Not too hot on Firewalls myself,
> but I think some 
> even go as far as to look at the protocol being
> used, and also only 
> provide access to safe IP addresses. Good to share
> the experiences so we 
> can all learn though.

Yes, FTP is another issue as you say.
I think that i'll provide a webpage to
upload the stacks from there.

Thanks a lot for your answers,
David and Chipp!

al

=====
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http://www.geocities.com/capellan2000/


		
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