30 November 2007 | 7,100 views

fwtest – Firewall Testing Toolkit

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The firewall test suite fwtest is a security auditing tool made up of two parts: the test control application fwtest and optionally one or two helper processes named fwagent. The test control application fwtest starts up the python interpreter with the given test script. The test script controls the packet data flow between two virtual interfaces A and B.

For this purpose the python interpreter is extended by commands which support the construction and transfer of arbitrary IP-packets. In this way it is possible to stimulate a firewall (or other relaying network nodes) connected between the interfaces A and B.

According to the interface-spec the virtual interfaces A and B are mapped on given physical interfaces on the same host the fwtest is running or to an interface on a remote host which runs the application fwagent. For the remote access the fwtest establishes a control TLS-protected connection to the fwagent on the specified host. You may use a ca structure or a fingerprint file to authenticate the peer. The shell script keymager.sh is distributed with this software to help you generate the necessary keys for both (ca structure and fingerprint) variants.

For both variants (one or two fwagents) the interfaces needs to be controlled by fwtest and fwagent on the link level. This is achieved by use of the berkely packet filter library pcap for reading and The Network Library libnet for writing of packets.

You can download fwtest source code here:

fwtest-0.5.2.tgz

Or read more here.



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5 Responses to “fwtest – Firewall Testing Toolkit”

  1. Fran 30 November 2007 at 10:07 am Permalink

    Resource not found :(

  2. Goodpeople 30 November 2007 at 10:22 am Permalink

    I’d love to read more, but like Fran said.. It ain’t there!

  3. Darknet 30 November 2007 at 10:49 am Permalink

    Sorry guys, the links had changed slightly I didn’t notice as I’ve had this in draft for a while.

    Both links are fixed now.

  4. Goodpeople 30 November 2007 at 12:10 pm Permalink

    hmm, I wanted to read more because the article above just doesn’t make much sense to me. Maybe my English is too limited, maybe lack of sleep or maybe even a hangover..

    Unfortunately there’s not much to read at the “read more’ link.

    But I did notice that fwtest is a German product. Isn’t this kind of tool illegal in Germany nowadays?

  5. Sir Henry 14 December 2007 at 4:58 pm Permalink

    This has been on my list of tools to preview for a while, especially while I was working for one of the major FW vendors. Unfortunately, I never got around to testing it out.

    @Goodpeople:

    It is unfortunate that Germany has put a stranglehold on these tools. What is their method of enforcement? I see that kismac shut down due to this law, but I have not seen what the ramifications have been to stand steadfast and defiant against this law.