WebCopy allows you to configure which security protocols to use.
Some websites can only be accessed if TLS 1.1 or 1.2 is enabled. By default, WebCopy enables all protocols, including the legacy SSL3 protocol. If trying to crawl a website fails with a "An existing connection was forcibly closed by the remote host" error, this may be due to disabling required protocols.
If the SSL certificate associated with a website is invalid or untrusted, WebCopy will refuse to copy the site. You can force such sites to be copied by ignoring certificate errors.
Due to the security risks of compromised websites, enabling this setting is not recommended