It seems noone mentioned the solution.

Give the UA a cookie jar if you want it to remember cookies.

Tell it it's "ok" to redirect POST requests if you need it to redirect POST requests (although it's not really ok).

Excellent. So 1. Post Redirects: @{$ua->request_redirectable}. 'POST';

2. Cookies: $ua->cookie_jar(HTTP::Cookies->new(file => "lwpcookies.txt", autosave => 1)); Do I need to dig deeper about saving/updating the cookie or is it good from there?

3. Encapsulation: From Wireshark it appears the redirect also encapsulates the data via: application/x-www-form-urlencoded. How do I do this? The default seems to place the data on a single line.

BTW The Live HTTP header program which plugs into FireFox is excellent at cutting through the minutia and getting to the meat of the calls. Much easier and quicker than the sniffer trace.

To set the encoding of your HTML::Form object, look at the ->enctype method of HTML::Form.