HTTP response header

X-Cnection: close header is added to server-side connections utilizing an existing Keep-Alive connection if the client request included the Connection: close header. The BIG-IP uses the X-Cnection: close header to track client-side connections that want to close the connection after receiving a response through a virtual server utilizing the OneConnect feature.

Header usage statistics

X-Cnection response header information and usage statistics.

Websites using header X-Cnection 4,642
Percentage of websites that use X-Cnection header <0.1%
Total discovered header values 3
Header uses directives No
Header values are unique or random No
Most popular in the country United States of America

Connected technologies

Technologies that utilize the header

F5 BigIP, category Reverse Proxy, total 27,236 websites

Distribution by websites popularity

X-Cnection detection in the top websites by popularity

Top 10k sites 18 websites
Top 100k sites 58 websites
Top 1m sites 573 websites

Websites utilizing X-Cnection

List of websites that use X-Cnection header

Domain Country Rank Contacts
www.americanexpress.com United States of America 911
ceneo.pl Poland 1,149
www.klm.com United States of America 2,324
iberia.com Spain 2,410
chanel.com France 2,871
www.chanel.com United States of America 2,871
See full domain list
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Geographical Distribution

Header usage distribution by websites across the globe.

Common header values

List of top common X-Cnection header values

Header value Value prevalence
close 99.89%
close, keep-alive 0.06%
keep-alive, close 0.04%