The 565 Proxy Handshake Failed error happens when the connection between the proxy and the destination or target website cannot be established successfully. This handshake failure can happen for several reasons, including:
High proxy load: The proxy may be under heavy usage, causing delays or failures in establishing connections.
Website rejection: The target website might be actively rejecting connections from the proxy, often due to anti-bot measures or IP restrictions.
Excessive parallel requests: If you’ve sent a large number of simultaneous requests through the same sticky session, the proxy or website may struggle to handle the load, leading to connection failures.
To resolve this issue, try the following steps:
Reduce the number of parallel requests to ease the load on the proxy.
Verify that the target website is not blocking proxy connections.
If using a sticky session, consider releasing it and retrying with a new proxy.