I have my own server running lighttpd. When viewing the headers with "curl -I ..." on my laptop through my standard / regular internet connection, I get this:
HTTP/1.1 200 OK Content-Type: application/zip ETag: "546653951" Last-Modified: Wed, 08 May 2013 15:35:42 GMT Content-Length: 28166067 Date: Wed, 08 May 2013 19:07:36 GMT Server: lighttpd/1.4.28
When I switch my laptop over to my cell phone connection (wifi hotspot), I run the exact same command in the exact same terminal to the exact same server, I get back this:
HTTP/1.1 200 OK Content-Type: application/zip Accept-Ranges: bytes ETag: "546653951" Last-Modified: Wed, 08 May 2013 15:35:42 GMT Content-Length: 28166067 Date: Wed, 08 May 2013 19:09:23 GMT Server: lighttpd/1.4.28
Note that "Accept-Ranges: bytes" is present in the second case but not the first.
What can possibly be causing this? I desperately need this pause / resume capability, it's been missing on my connection for as long as I can remember and just never investigated why (not just to my own server, but to ANY server / file that I wanted to download)... From a different computer I have access to, running the same curl command shows that Accept-Ranges: bytes is present, so I'm assuming there is something wonky with my regular ISP here at home.
Would network hardware cause this? Incompatible router / switch maybe? Or would it be the ISP itself?
As requested by Dennis, here is the output:
echo > tempfile; wget -d -c -O tempfile redtwitz.com Setting --continue (continue) to 1 Setting --output-document (outputdocument) to tempfile DEBUG output created by Wget 1.13.4 on linux-gnu. URI encoding = `UTF-8' --2013-05-10 12:20:48-- http://redtwitz.com/ Resolving redtwitz.com (redtwitz.com)... 184.108.40.206 Caching redtwitz.com => 220.127.116.11 Connecting to redtwitz.com (redtwitz.com)|18.104.22.168|:80... connected. Created socket 4. Releasing 0x00000000013d1310 (new refcount 1). ---request begin--- GET / HTTP/1.1 Range: bytes=1- User-Agent: Wget/1.13.4 (linux-gnu) Accept: */* Host: redtwitz.com Connection: Keep-Alive ---request end--- HTTP request sent, awaiting response... ---response begin--- HTTP/1.1 200 OK Date: Fri, 10 May 2013 16:21:56 GMT Server: Apache/2.2.14 (Ubuntu) Last-Modified: Thu, 02 Aug 2012 13:41:17 GMT ETag: "a819c40-d-4c64890da1940" Content-Length: 13 Vary: Accept-Encoding Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Content-Type: text/html ---response end--- 200 OK Registered socket 4 for persistent reuse. Length: 13 [text/html] Saving to: `tempfile' 100%[================================================================>] 13 --.-K/s in 0s 2013-05-10 12:20:49 (783 KB/s) - `tempfile' saved [13/13] more tempfile edtwitz.com