twimg.com 好像一直(或大多数)都没有被墙的吧
curl
https://pbs.twimg.com/media/CkfhtlvWYAIgdMb.jpg:orig -v > /dev/null
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Trying 104.244.43.135...
0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* Connected to
pbs.twimg.com (104.244.43.135) port 443 (#0)
* TLS 1.2 connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate: *.twimg.com
* Server certificate: DigiCert SHA2 High Assurance Server CA
* Server certificate: DigiCert High Assurance EV Root CA
> GET /media/CkfhtlvWYAIgdMb.jpg:orig HTTP/1.1
> Host:
pbs.twimg.com> User-Agent: curl/7.43.0
> Accept: */*
>
< HTTP/1.1 200 OK
< Date: Thu, 09 Jun 2016 17:23:15 GMT
< Server: Apache
< access-control-allow-origin: *
< cache-control: max-age=604800, must-revalidate
< content-md5: ppYsQlEEfam1trtSfEdeww==
< content-type: image/jpeg
< last-modified: Thu, 09 Jun 2016 07:32:44 GMT
< x-connection-hash: 03d3d915f1e9daee68c580e95d73d63a
< x-response-time: 18
< Content-Length: 35924
< Accept-Ranges: bytes
< Via: 1.1 varnish
< Age: 34261
< X-Served-By: cache-tw-lax1-cr1-17-TWLAX1
< X-Cache: HIT
< Expires: Fri, 24 Jun 2016 17:23:15 GMT
< X-Content-Type-Options: nosniff
<
0 35924 0 0 0 0 0 0 --:--:-- 0:00:01 --:--:-- 0{ [7451 bytes data]
100 35924 100 35924 0 0 9606 0 0:00:03 0:00:03 --:--:-- 9605
* Connection #0 to host
pbs.twimg.com left intact