box / # curl -I
https://olegon.ru/customavatars/avatar1_18.gif HTTP/1.1 200 OK
Server: nginx
Date: Fri, 20 Feb 2015 10:29:50 GMT
Content-Type: image/gif
Content-Length: 9070
Last-Modified: Sat, 08 Nov 2014 09:42:37 GMT
Connection: keep-alive
ETag: "545de58d-236e"
Expires: Thu, 31 Dec 2037 23:55:55 GMT
Cache-Control: max-age=315360000
Public-Key-Pins: pin-sha256="base64+info1="; pin-sha256="backup+pin+here=="; max-age=15768000; includeSubDomains
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Strict-Transport-Security: max-age=15768000; includeSubDomains
Accept-Ranges: bytes
box / # curl -A "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E)" -I
https://olegon.ru/customavatars/avatar1_18.gif
HTTP/1.1 200 OK
Server: nginx
Date: Fri, 20 Feb 2015 10:29:53 GMT
Content-Type: image/gif
Content-Length: 9070
Last-Modified: Sat, 08 Nov 2014 09:42:37 GMT
Connection: keep-alive
ETag: "545de58d-236e"
Expires: Thu, 31 Dec 2037 23:55:55 GMT
Cache-Control: max-age=315360000
Public-Key-Pins: pin-sha256="base64+info1="; pin-sha256="backup+pin+here=="; max-age=15768000; includeSubDomains
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Strict-Transport-Security: max-age=15768000; includeSubDomains
Accept-Ranges: bytes