DNS Gurus
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26 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=2628000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Excellent
DENY
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-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
Transfer-Encoding
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Encoding, User-Agent

Caching Headers

1 headers
Cache-Control
Caching
private, max-age=0, no-cache, no-store, must-revalidate

Content Headers

1 headers
Content-Type
Content
text/html; charset=utf-8

Server Headers

1 headers
X-Powered-By
Server
Express

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
bm_sz=C8A205C9578276369CC94F017BEE7608~YAAQips+F0WRfNWbAQAAMs69+R7yKzmLQKDVvB4D43DeC/luK+caqPQHhi/MQzY7+Q6a9JU5kUbtkE+V53o4UxJAvFjxMwRtBcftORIKjbDq/MgEJetLckmz4/6l/WRQvo0FrykH2V0kNn4l/DazHouNMMTTu+jHsPmg8hEIJfoZAspOGWEZ1JmIeWwPzDZL/T5/4jEpKCxuiSe7SaaQre9Vy5tWbz+N+dKQSKua42kvuQUbfxspsMWpZGRxnM4sQmA4tJofB4OaV75zFb8njQhVH0k0VLfK2Vcr+hALMK4mgDghdXzJA7gqsRH9DgCRlhhZLZEEq2GYH0zE1j4EMbHXcO4SPzB61Ch4+hJA~3619142~3683641; Domain=.groupon.jp; Path=/; Expires=Mon, 26 Jan 2026 13:58:44 GMT; Max-Age=14400

Other Headers

17 headers
Date
Other
Mon, 26 Jan 2026 09:58:44 GMT
Server-Timing
Other
rReq;dur=261, rCon;dur=0, rHdr;dur=260, hbi;dur=253
X-Akamai-Transformed
Other
0 - 0 -
X-B-Cookie
Other
1c0b7514-a1c1-4383-8b75-14a1c1e38377
X-B3-Traceid
Other
d7656dbb5a084367ae0a754f2869a8b4
X-Destination
Other
tls_conveyor_customer_support_itier
X-Envoy-Upstream-Service-Time
Other
261
X-External-Request-Id
Other
true
X-Forwarded-Proto
Other
https
X-Mtls-Upstream-Time
Other
253
X-Original-Request-Id
Other
d7656dbb-5a08-4367-ae0a-754f2869a8b4
X-Request-Id
Other
d7656dbb-5a08-4367-ae0a-754f2869a8b4,d7656dbb-5a08-4367-ae0a-754f2869a8b4
X-Request-Originated-From
Other
envoy-tls-side-car--ingress-https
X-Response-Served-From
Other
routing-service--public--eu-west-1--conveyor-production49
X-S-Cookie
Other
5822362a-2627-47db-a236-2a262727dba8
X-Signifyd-Cookie
Other
0a195ba7-f9c2-43eb-995b-a7f9c243ebd7
X-Ua-Compatible
Other
IE=edge,chrome=1

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology