nginx 的默认服务器这么写，可以实现 http 无 Host 时直接断开连接，https 无 SNI 时返回 ERR_SSL_UNRECOGNIZED_NAME_ALERT，同时 http 请求错误地发到 https 端口时也会直接断开连接。
server {
server_name _;
listen 80 default_server;
listen 443 ssl http2 default_server;
ssl_reject_handshake on;
error_page 497 =444 /;
return 444;
}BY FlyingSky's Channel
Importantly, that investor viewpoint is not new. It cycles in when conditions are right (and vice versa). It also brings the ineffective warnings of an overpriced market with it.Looking toward a good 2022 stock market, there is no apparent reason to expect these issues to change.
n the U.S. people generally use Bitcoin as an alternative investment, helping diversify a portfolio apart from stocks and bonds. You can also use Bitcoin to make purchases, but the number of vendors that accept the cryptocurrency is still limited. Big companies that accept Bitcoin include Overstock, AT&T and Twitch. You may also find that some small local retailers or certain websites take Bitcoin, but you’ll have to do some digging. That said, PayPal has announced that it will enable cryptocurrency as a funding source for purchases this year, financing purchases by automatically converting crypto holdings to fiat currency for users. “They have 346 million users and they’re connected to 26 million merchants,” says Spencer Montgomery, founder of Uinta Crypto Consulting. “It’s huge.”
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