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 50,673
Percentage of websites that use X-Cnection header <0.1%
Total discovered header values 4
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 Security Solutions, total 245,050 websites

Distribution by websites popularity

X-Cnection detection in the top websites by popularity

Top 10k sites 16 websites
Top 100k sites 176 websites
Top 1m sites 885 websites

Websites utilizing X-Cnection

List of websites that use X-Cnection header

Domain Country Rank Contacts
www.americanexpress.com United States of America 2,635
web.mit.edu United States of America 2,680
purdue.edu United States of America 4,615
www.purdue.edu United States of America 4,615
refer.ccbill.com United States of America 5,451
app.icontact.com United States of America 5,647
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 99.97%
keep-alive, close 0.01%
close, keep-alive 0.01%
keep-alive 0.00%