SNI Proxy 超时尝试多次后才成功，有没有遇到同样问题的？

我用 SNI Proxy 代理 Github 全站，不知道为什么过段时间就连不上，需要尝试多次才能连接，使用 telnet 连接端口也是这样。

但是浏览器访问完全没问题

wget 执行结果，尝试 8 次才成功，ping 200ms 左右。

--2017-09-17 13:31:43--  (try: 7)  https://github.com/typecho/typecho/releases/download/v1.0-14.10.10-release/1.0.14.10.10.-release.tar.gz
Connecting to github.com (github.com)|0.0.0.0|:443... failed: Connection timed out.
Retrying.

--2017-09-17 13:31:53--  (try: 8)  https://github.com/typecho/typecho/releases/download/v1.0-14.10.10-release/1.0.14.10.10.-release.tar.gz
Connecting to github.com (github.com)|0.0.0.0|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://github-production-release-asset-2e65be.s3.amazonaws.com/11467667/1a550a0e-5105-11e4-85ca-664dbf315ccc?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20170917%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20170917T053154Z&X-Amz-Expires=300&X-Amz-Signature=11ce79015455a653a1f6ef31ae39085eda008e43a6e06444e53bd638ddf6e574&X-Amz-SignedHeaders=host&actor_id=0&response-content-disposition=attachment%3B%20filename%3D1.0.14.10.10.-release.tar.gz&response-content-type=application%2Foctet-stream [following]

配置文件

user nobody

resolver {
    nameserver 8.8.8.8
    mode ipv4_only
    #mode ipv4_first
}

access_log {
    filename /tmp/sniproxy-access.log
}

error_log {
    filename /tmp/sniproxy-error.log
}

listen 0.0.0.0:443 {
  proto tls
  table https_hosts
}

table https_hosts {
    # Github
    (.*.|)github.com$ *
    (.*.|)githubusercontent.com$ *
    github(.*).s3.amazonaws.com$ *
}

连接超时时无日志，好像是根本没连上端口，但端口确实在监听。