```curl -x proxy.crawlera.com:8010 -U my_api_key: http://httpbin.org/ip```
successfully returns me a page but not every time.
It can work well for 20 minutes then 5 minutes it returns:
```curl: (52) Empty reply from server```
This works this way all the time.
In not working periods I can establish connection with
"telnet proxy.crawlera.com 8010"
but didn't get a reply. Connection is closing after typing just first line.
Connected to proxy.crawlera.com.
Escape character is '^]'.
GET http://httpbin.org/ip HTTP/1.1
Connection closed by foreign host.
I can see this behaviour only on machine where my scrapy crawler works with ip: 220.127.116.11
It has 100% uptime from machines with another ip address.
So I assume your proxy filters my IP somehow.
Please help me to figure out what happens.