bootstrapcdn.com

Mixed

Results vary across bootstrapcdn.com: of 47 URLs tested, 12 are blocked, 5 are disrupted some of the time and 30 load normally. The Great Firewall silently drops its packets so requests time out, poisons its DNS and blocks the connection outright. 1,309 tests have been run under this domain since 2013-08-08, the most recent on 2026-07-22.

Timeout / silent drop 10 DNS poisoning 9 Connection failed 4 Connection reset 3 TLS handshake failure 1

Plain HTTP and HTTPS differ here: http://bootstrapcdn.com is intermittent, https://bootstrapcdn.com is not blocked.

The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.

47URLs tested

12blocked

1,309tests all-time

2013first tested

8 d agolast tested

The site itself

http://bootstrapcdn.comas of 2026Intermittent https://bootstrapcdn.comNot blocked http://www.bootstrapcdn.comNot blocked https://www.bootstrapcdn.comas of 2026Not blocked

Pages and subdomains (43)

http://netdna.bootstrapcdn.comas of 2026Blocked http://maxcdn.bootstrapcdn.comas of 2026Not blocked https://maxcdn.bootstrapcdn.comas of 2026Not blocked https://netdna.bootstrapcdn.comas of 2026Not blocked https://stackpath.bootstrapcdn.comNot blocked http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.jsas of 2025Blocked http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.jsNot blocked http://netdna.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.jsas of 2025Blocked http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.jsas of 2025Blocked https://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.jsNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.jsas of 2025Blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.jsNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.jsas of 2025Blocked http://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.cssNot blocked http://netdna.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.cssas of 2025Blocked http://maxcdn.bootstrapcdn.com/bootstrap/2.3.1/css/bootstrap.min.cssNot blocked http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.cssas of 2025Blocked https://netdna.bootstrapcdn.com/bootstrap/3.0.2/css/bootstrap.min.cssNot blocked http://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/cs+s/bootstrap.min.cssNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.1/css/bootstrap.min.cssNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.cssas of 2025Blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.cssNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.cssas of 2025Intermittent https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.cssas of 2025Blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.cssas of 2026Not blocked http://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.cssNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/3.3.2/cs+s/bootstrap.min.cssNot blocked https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.jsNot blocked https://stackpath.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.jsNot blocked https://netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.cssas of 2026Not blocked https://netdna.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.cssas of 2025Intermittent https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.cssas of 2026Not blocked https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.cssas of 2025Blocked https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/+css/bootstrap.min.cssas of 2025Intermittent https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.cssNot blocked https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.bundle.min.jsas of 2026Not blocked https://netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.min.cssNot blocked https://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.cssas of 2025Intermittent https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.cssNot blocked https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.cssas of 2025Blocked https://stackpath.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.bundle.min.jsas of 2026Not blocked https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css?ver=2.10.3Not blocked https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/fonts/fontawesome-webfont.woff2?v=4.6.3as of 2026Not blocked

About bootstrapcdn.com and the Great Firewall

Is bootstrapcdn.com blocked in mainland China?

Results vary across bootstrapcdn.com: of 47 URLs tested, 12 are blocked, 5 are disrupted some of the time and 30 load normally. The Great Firewall silently drops its packets so requests time out, poisons its DNS and blocks the connection outright. 1,309 tests have been run under this domain since 2013-08-08, the most recent on 2026-07-22.

Why does http://bootstrapcdn.com behave differently from https://bootstrapcdn.com?

Plain HTTP and HTTPS differ here: http://bootstrapcdn.com is intermittent, https://bootstrapcdn.com is not blocked. The two are filtered by different means — an unencrypted request by the address and keywords it carries in the clear, an encrypted one by the server name in its TLS handshake — so one working while the other does not is normal.

How can I reach bootstrapcdn.com from mainland China?

A VPN or another circumvention tool routes the request outside mainland China, past the filtering that blocks bootstrapcdn.com. GreatFire runs GreatFire VPN; the Analyzer also tests the domains of many VPN and proxy providers, so you can check whether one is reachable before relying on it.

Elsewhere on the site

Most-blocked .com domains Every tested URL under bootstrapcdn.com

Each URL's status is its verdict over the last 90 days, the same one its own page headlines.