{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://www.manongdao.com/data/attach/logo/logo.png', '推荐 戒情不戒烟 的问题《Rubygems blocked by Norton DNS》','https://www.manongdao.com/q-1056578.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
I ran
$ gem fetch -V github-linguist
GET http://rubygems.org/latest_specs.4.8.gz
302 Moved Temporarily
GET http://production.s3.rubygems.org/latest_specs.4.8.gz
200 OK
ERROR: While executing gem ... (Zlib::GzipFile::Error)
not in gzip format
then to my shock I opened the link in my browser and see this message
Norton DNS Malicious Web Site Blocked You attempted to access: production.s3.rubygems.org This is a known malicious web site. It is recommended that you do NOT visit this site. This site points to production.s3.rubygems.org.s3.amazonaws.com, which is malicious.
On pencil’s suggestion I ran namebench and have switched to OpenDNS-2.
Probably someone used AWS to distribute malware and some buggy automatism now blockes *.amazonaws.com
Must be a filter anywhere between you and Amazon (Router/Firewall, Proxy, ISP, Name Server, ...). Start by using different name servers (like Google's 8.8.8.8).