Deny incoming proxy ?

Hy, i want to deny all incoming proxy connections is it possible? And how i do it?

add firewall rule to block traffic going to your proxy.

I don’t have proxy.
For example someone is trying to enter to my website using proxy, the router job is to block him ( drop pachets ).
Is it posible ?

It is not possible that router would know if client request is coming from proxy or not.

if you have an address list with addresses of proxies, use

/ip firewall filter add chain=forward src-address-list=proxies action=reject