[NBLUG/talk] Routing to a web proxy from an embedded device

[Tom Most]

I haven't used Fiddler in years, but based on a quick look at the current
Fiddler and Charles docs it looks like you could use their reverse proxy
modes in a manner similar to Squid's "transparent" proxy support.  You
should then be able to find docs on this pretty easily---e.g., <
http://www.tldp.org/HOWTO/TransparentProxy-6.html>.  It involves using
iptables rules to shove all traffic on port 80 through the proxy.  I
haven't done this myself, but hopefully this gives you something to go on.

---Tom

On Tue, Dec 16, 2014 at 4:53 PM, Matt Hardwick <matthew.hardwick at gmail.com>
wrote:

> Hi Everyone,
>
> I have a situation where I have an embedded device that will only allow
> itself to get an IP address via DHCP. I want to be able to somehow route
> that device through a Fiddler/Charles proxy for development purposes.
>
> Normally for most devices that support a web proxy, and manual ip
> configuration I would just setup the device to point to my development
> boxes Fiddler/Charles proxy, but in this case I can't because the device
> does not support it.
>
> If you are unfamiliar with Fiddler it is a Windows based application that
> can act as a proxy where you can auto respond to HTTP traffic, simulate all
> sorts of bad requests and latency, manipulate data, trace calls, view
> headers, etc. It is a pretty amazing tool for development, but for embedded
> devices with only DHCP abilities there isn't really a clean way to use it.
> Charles is a similar piece of software but is also available for Mac and
> Linux -- I don't have experience with it but will likely try it out because
> for the first time in a long time I don't have a dependency on Windows for
> development.
>
> The device in question does support the ability to capture pcap, but it's
> truncated, and can only be viewed after the fact, so for looking at the
> data calls in say Wireshark this is a partial solution, but the
> manipulation ability would be missing.
>
> I figured this might be a good forum to check with because I will likely
> have to setup a linux box to act as a router.
>
> Any thoughts?
>
> Thanks,
> Matt
>
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