looking for software to harden TCP/IP client-server application

Polytropon freebsd at edvax.de
Thu May 21 11:50:57 UTC 2015

On Thu, 21 May 2015 08:02:04 +0200, Matthias Apitz wrote:
> Hello,
> I'm working for a company which develops since "ages" a client-server
> application: Windows/UNIX Java or Perl written clients are connecting to
> defined TCP ports where C/C++ written servers are doing LISTEN and serving the
> connecting clients. The designed protocol is human readable and an
> example is in clear text (normally SSL is used to protect the
> data against network sniffing) here: http://www.unixarea.de/slnp.txt
> What I'm looking for is some (hopefully FreeBSD) software to harden the
> server side against attacks of all kind of buffer overflow, SQL injection,
> etc.
> Any ideas?

Fuzzing tools are the first things I would think of. Because
this is _not_ a web application, tools designed to harden
web-based systems probably don't work here (Burp Suite, for

The ports collection has security/fuzz, security/fuzzdb, and
security/honggfuzz. AFL is also worth lookin at - try if it
compiles on FreeBSD (it's a Linux program). Here's the source:


Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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