Free or public proxy servers are often slow, unreliable, and frequently blocked. Premium services offer:
For premium filtering, with Xray-core is recommended. danlwd fyltr shkn V2ray nskhh qdymy
I notice the text you provided ("danlwd fyltr shkn V2ray nskhh qdymy") appears to be in a cipher or encoded format, possibly a keyboard shift cipher (like each letter is shifted on a QWERTY keyboard). Free or public proxy servers are often slow,