FW_Traversal

This is the Directory Transversal protection in the Firewall Options. This feature prevents the submission of any variable that contains ../ in the value, which protects you against the potential exploitation of some themes and plugins that might otherwise allow a hacker to read or write to an arbitrary file on your server.

You can look into the contents of the form that you posted on your site that got redirected and see if you can spot the usage of ../ in one of that field values, or you can just turn this feature off on the Firewall Options page in your wp-admin (but understand that you may be leaving your site open to a directory transversal attack if you have any vulnerable plugins or theme feature that could be exploitable if you turn off this option).

Feel free to write back with more detail if figure out why this form was getting blocked or if you need more help to figure it out.

Maybe it was something like /etc/ or maybe it was a hidden field.

If this is a consistent and repeatable occurrence then maybe you could provide me with HTML of the completed form that is getting blocked/redirected so that I can check it against the current firewall pattern to see what it causing it to be flagged as a directory transversal?

You can email me with any content examples if you don’t want it to be posted on this public forum:
eli AT gotmls DOT net

I have not seen any emails from you yet and I look forward to helping you find the solution to this issue. Please let me know if you figure it out or if you need more help.