How can I exclude Access Denied and reCapcha Page from Proxy Cached?

[channchetra]

I'm deployed shieldon on all my site with different server but all visitor are visited throw single proxy and on proxy I was cached all page but some time an IP was banned by Shieldon and that IP try to access other page and all page and banned but it cached on proxy too so other visitor they see banned page too I want to exclude that page from proxy caching what should I do? which page I need to add in proxy configure?