DNS Gurus

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for a248.e.akamai.net, *.akamaized.net, *.akamaized-staging.net, *.akamaihd.net, *.akamaihd-staging.net, not for groupon-content.net

Cached · just now
12 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=15768000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

2 headers
Connection
Performance
close
Vary
Performance
Accept-Encoding, User-Agent

Caching Headers

2 headers
Cache-Control
Caching
no-cache, no-store, must-revalidate
Expires
Caching
0

Content Headers

2 headers
Content-Length
Content
2138
Content-Type
Content
text/html

Server Headers

1 headers
Server
Server
Groupon

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
ak_bmsc=F6FBF17A5294AFC6496732D33170DF2C~000000000000000000000000000000~YAAQasgwF/QFchycAQAAfVlVHh773VU/kYHsxzhfEmyDdI2zRGy5RDKfZMFPgOW41tFKTeP4C5g4mdbn7uip6vs174JIys3y5qZfW/7v9f1yf6cjC+zKa3Ik0qwohCdlMlCfrb419/ZHenMFAqqJvT0Iz7coLap6BiVNbooC82eDtAThgLjHy2tUEToW+TBPEUvtZ6xT1eTPUQF2TrR0HMzy7XikT8LdHlCr0qfXM5aPZbwLhN++uaCBuxB6UHkMjaeElPq4kKzaXD3qtsAHtAMp/GGZX+oSaoyvX6GlZiy0fh2tSYJXonpb+B9hRcLi8RlrU2f/14M5ujWFE6LJCr6qeF75cq0q/XIPLrxaauQWklMVLOeDNVxH4qHhV4a7D42q4PY61sp8edTYBPu/XCjYLupN; Domain=.groupon.com; Path=/; Expires=Mon, 02 Feb 2026 14:30:35 GMT; Max-Age=7200; HttpOnly

Other Headers

3 headers
Date
Other
Mon, 02 Feb 2026 12:30:35 GMT
Mime-Version
Other
1.0
X-Reference-Error
Other
18.6ac83017.1770035435.25d929c5

Recommendations

Enable compression (gzip/brotli) to improve performance