DNS Gurus
Cached · just now
29 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Good
no-referrer
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Content-Type-Options: nosniff
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
close
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Encoding

Caching Headers

3 headers
Cache-Control
Caching
private, no-cache, no-store, must-revalidate
Expires
Caching
Sat, 26 Jul 1997 05:00:00 GMT
Pragma
Caching
no-cache

Content Headers

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

Server Headers

1 headers
Server
Server
Apache

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
d-l=deleted; expires=Thu, 01-Jan-1970 00:00:01 GMT; Max-Age=0; path=/; domain=.slack.com; secure; SameSite=Lax

Other Headers

15 headers
Alt-Svc
Other
h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, quic=":443"; ma=2592000
Date
Other
Tue, 13 Jan 2026 19:36:18 GMT
Timing-Allow-Origin
Other
*
Via
Other
1.1 slack-prod.tinyspeck.com, envoy-www-iad-eoymlcvy,envoy-edge-iad-mliqofwk
X-Backend
Other
main_normal
X-Edge-Backend
Other
envoy-www
X-Envoy-Attempt-Count
Other
1
X-Envoy-Upstream-Service-Time
Other
97
X-Geoname-Id
Other
notfound
X-Robots-Tag
Other
noindex,nofollow
X-Server
Other
slack-www-hhvm-main-iad-0t3sskasyy9t
X-Slack-Backend
Other
r
X-Slack-Edge-Shared-Secret-Outcome
Other
no-match
X-Slack-Shared-Secret-Outcome
Other
no-match
X-Slack-Unique-Id
Other
aWaesuIyvkR44kbLal9PyQAAAB8

Recommendations

Enable compression (gzip/brotli) to improve performance