Re: Novice Questions: Non-Standard Service Listening on Port/Firewalls

From: Ant (not_at_home.today)
Date: 08/19/04 

Date: Thu, 19 Aug 2004 01:54:00 +0100

"sammy" wrote...
> Hi,
>
> I'm just getting into this network security stuff and have a few basic
> questions:
>
> 1.) If ALL ports are closed except ONE, and...
>
> on that one port I have listening a custom service that I wrote in C, and...
>
> the server is directly connected to the Internet for all to see, ...
>
> am I right in assuming the only way someone can get in from the Internet is
> through exploiting a buffer overflow in my code after making a basic socket
> connection?

In general, yes, but it would depend on what your custom prog is doing.

Consider also the Windows socket library you are using. Can you be sure
the functions you use in that dll are free of such bugs?

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