ldoughty

I don’t use webmaster tools, so I don’t know what the problem with that tool is, or how it knows what URL’s are being requested on your wordpress site

https://www.regular-expressions.info/modifiers.html

Regex is a “language” for text matching. Checking the box does nothing (or ensures the failure) of the matching if you don’t actually provide the Regex.

You need to either put in the various case-sensitive options without selecting Regex, or look online to find out how to make your string case-insensitive by regex

You need to provide more technical details if you’d like help. For instance

1) What are the settings for the redirection plugin for this entry (source, destination, settings)
2) What are the values being passed in from the source
3) What’s broken, in more detail then “doesn’t work”… how does it not work?

you should either:
1) Have 2 entries in the Redirection plugin for each post, one with trailing slash, one without, or:
2) Use regex

There is no other practical solution

You should probably mention what you’ve tried (specifically) for the matching fields.

To do wild-card matching, you need to do Regex as stated in the setup guide for the plugin. I don’t see regex listed in your post.

If this is random traffic you’re getting, you can’t really do anything to stop that… People hammer websites every day trying to find vulnerabilities. I wouldn’t try to catch/fix these types of requests unless it was expected traffic

That looks like an error straight out of IIS.

This is not a bug/problem with the Plugin, the request is not passing through the web server to the WordPress code to process (let alone this plugin).

What Regex string are you using?