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engineering.fb.com Open in urlscan Pro
2a04:fa87:fffd::c000:42ec  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: http://facebookmicrosites.github.io/
Effective URL: https://engineering.fb.com/
Submission: On October 31 via manual from US — Scanned from DE
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 5 IPs in 4 countries across 5 domains to perform 40 HTTP transactions. The main IP is 2a04:fa87:fffd::c000:42ec, located in Ireland and belongs to AUTOMATTIC, US. The main domain is engineering.fb.com. The Cisco Umbrella rank of the primary domain is 852180.
TLS certificate: Issued by DigiCert SHA2 High Assurance Server CA on September 16th 2024. Valid for: a year.
This is the only time engineering.fb.com was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

2    2606:50c0:8000::153 (United States)

ASN54113 (FASTLY, US)
facebookmicrosites.github.io
1    2a03:2880:f03d:12:face:b00c:0:2 (Prague, Czech Republic)

ASN32934 (FACEBOOK, US)
code.facebook.com
1    2a04:fa87:fffd::c000:421d (Ireland)

ASN2635 (AUTOMATTIC, US)
code.fb.com
34    2a04:fa87:fffd::c000:42ec (Ireland)

ASN2635 (AUTOMATTIC, US)
engineering.fb.com
1    2a00:1450:4001:810::200e (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)
www.googleoptimize.com
2    2a03:2880:f083:100:face:b00c:0:3 (Frankfurt am Main, Germany)

ASN32934 (FACEBOOK, US)
connect.facebook.net
Apex Domain
Subdomains		 Transfer
35 fb.com
code.fb.com
engineering.fb.com — Cisco Umbrella Rank: 852180
1 MB
2 facebook.net
connect.facebook.net — Cisco Umbrella Rank: 180
76 KB
2 github.io
facebookmicrosites.github.io — Cisco Umbrella Rank: 733871
1 KB
1 googleoptimize.com
www.googleoptimize.com — Cisco Umbrella Rank: 3678
69 KB
1 facebook.com
code.facebook.com
106 B
40 5
Domain Requested by
34 engineering.fb.com engineering.fb.com
2 connect.facebook.net engineering.fb.com
connect.facebook.net
2 facebookmicrosites.github.io
1 www.googleoptimize.com engineering.fb.com
1 code.fb.com 1 redirects
1 code.facebook.com 1 redirects
40 6
Subject Issuer Validity Valid
*.github.io
DigiCert Global G2 TLS RSA SHA256 2020 CA1		 2024-03-15 -
2025-03-14		 a year crt.sh
engineering.fb.com
DigiCert SHA2 High Assurance Server CA		 2024-09-16 -
2025-09-16		 a year crt.sh
*.google-analytics.com
WR2		 2024-10-07 -
2024-12-30		 3 months crt.sh
*.facebook.com
DigiCert SHA2 High Assurance Server CA		 2024-08-09 -
2024-11-07		 3 months crt.sh

This page contains 1 frames:

Primary Page: https://engineering.fb.com/
Frame ID: D74B3509C3BAB9AE489EB381906379CF
Requests: 39 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

Engineering at Meta - Engineering at Meta Blog

Page URL History Show full URLs

  1. http://facebookmicrosites.github.io/ HTTP 307
    https://facebookmicrosites.github.io/ Page URL
  2. https://code.facebook.com/ HTTP 301
    https://code.fb.com/ HTTP 301
    https://engineering.fb.com/ Page URL

Detected technologies

Overall confidence: 100%
Detected patterns
  • <link rel=["']stylesheet["'] [^>]+/wp-(?:content|includes)/
  • /wp-(?:content|includes)/
Overall confidence: 100%
Detected patterns
  • //connect\.facebook\.([a-z]+)/[^/]*/[a-z]*\.js
Overall confidence: 100%
Detected patterns
  • googleoptimize\.com/optimize\.js
Overall confidence: 100%
Detected patterns
  • prism\.js

Page Statistics

40
Requests

98 %
HTTPS

100 %
IPv6

5
Domains

6
Subdomains

5
IPs

4
Countries

1670 kB
Transfer

2786 kB
Size

0
Cookies

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

  1. http://facebookmicrosites.github.io/ HTTP 307
    https://facebookmicrosites.github.io/ Page URL
  2. https://code.facebook.com/ HTTP 301
    https://code.fb.com/ HTTP 301
    https://engineering.fb.com/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 0
  • http://facebookmicrosites.github.io/ HTTP 307
  • https://facebookmicrosites.github.io/

40 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
/
facebookmicrosites.github.io/
Redirect Chain
  • http://facebookmicrosites.github.io/
  • https://facebookmicrosites.github.io/
113 B
534 B 		Document
General
Check archive.org
Download Go to
Full URL
https://facebookmicrosites.github.io/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:50c0:8000::153 , United States, ASN54113 (FASTLY, US),
Reverse DNS
Software
GitHub.com /
Resource Hash
867954431ea93425cb69b7fcbbfe5cb30155fa750a561bd222825886d3d77bff
Security Headers
Name Value
Strict-Transport-Security max-age=31557600

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Response headers

accept-ranges
bytes
access-control-allow-origin
*
age
0
cache-control
max-age=600
content-length
113
content-type
text/html; charset=utf-8
date
Thu, 31 Oct 2024 13:29:59 GMT
etag
"5a7c83e9-71"
expires
Thu, 31 Oct 2024 13:39:59 GMT
last-modified
Thu, 08 Feb 2018 17:07:53 GMT
permissions-policy
interest-cohort=()
server
GitHub.com
strict-transport-security
max-age=31557600
vary
Accept-Encoding
via
1.1 varnish
x-cache
MISS
x-cache-hits
0
x-fastly-request-id
f84dbebc5ba5be21de26404701f15bfdaaa69e4b
x-github-request-id
C76C:30FE7C:4930310:4B2EF2C:67238656
x-proxy-cache
MISS
x-served-by
cache-fra-eddf8230055-FRA
x-timer
S1730381399.269968,VS0,VE105

Redirect headers

Location
https://facebookmicrosites.github.io/
Non-Authoritative-Reason
HttpsUpgrades
Primary Request /
engineering.fb.com/
Redirect Chain
  • https://code.facebook.com/
  • https://code.fb.com/
  • https://engineering.fb.com/
72 KB
14 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx / WordPress VIP <https://wpvip.com>
Resource Hash
ffc348d26eea5f98b45aba3f663b4fe1a40c0234abc7568599821a15e64bf77b
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

Referer
https://facebookmicrosites.github.io/
Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36

Response headers

accept-ranges
bytes
cache-control
max-age=300, must-revalidate
content-encoding
br
content-type
text/html; charset=UTF-8
date
Thu, 31 Oct 2024 13:29:59 GMT
host-header
a9130478a60e5f9135f765b23f26593b
link
<https://engineering.fb.com/wp-json/>; rel="https://api.w.org/" <https://wp.me/a0Lhq>; rel=shortlink
server
nginx
strict-transport-security
max-age=31536000;includeSubdomains;preload
vary
Accept-Encoding, accept, content-type
x-cache
HIT
x-hacker
If you're reading this, you should visit wpvip.com/careers and apply to join the fun, mention this header.
x-powered-by
WordPress VIP <https://wpvip.com>
x-rq
hhn2 111 253 443

Redirect headers

content-type
text/html; charset=utf-8
date
Thu, 31 Oct 2024 13:29:59 GMT
location
https://engineering.fb.com/
server
nginx
strict-transport-security
max-age=31536000;includeSubdomains;preload
x-cache
EXPIRED
x-rq
hhn1 111 254 443
favicon.ico
facebookmicrosites.github.io/ 		1 KB
706 B 		Other
General
Check archive.org
Download Go to
Full URL
https://facebookmicrosites.github.io/favicon.ico
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2606:50c0:8000::153 , United States, ASN54113 (FASTLY, US),
Reverse DNS
Software
GitHub.com /
Resource Hash
Security Headers
Name Value
Strict-Transport-Security max-age=31557600

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://facebookmicrosites.github.io/

Response headers

x-fastly-request-id
33e06344f3b4923e1d418fe526178825710b9bbb
content-encoding
gzip
etag
W/"5a7c83e9-46e"
age
0
x-github-request-id
C764:2F3FB4:33FA1D1:357F227:67238656
x-proxy-cache
MISS
x-cache
MISS
date
Thu, 31 Oct 2024 13:29:59 GMT
content-type
text/html; charset=utf-8
x-served-by
cache-fra-eddf8230055-FRA
x-cache-hits
0
vary
Accept-Encoding
strict-transport-security
max-age=31557600
x-timer
S1730381399.434023,VS0,VE114
via
1.1 varnish
permissions-policy
interest-cohort=()
accept-ranges
bytes
access-control-allow-origin
*
content-length
559
server
GitHub.com
optimize.js
www.googleoptimize.com/ 		190 KB
69 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://www.googleoptimize.com/optimize.js?id=OPT-TPNDQC5
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a00:1450:4001:810::200e Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
Google Tag Manager /
Resource Hash
aabce4ec0dd893a7fc606b1f0ad26ffd315858781892c35def3d158e19af6fa8
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; includeSubDomains
X-Xss-Protection 0

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

content-encoding
br
report-to
{"group":"coop_reporting","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/scaffolding/ascgcycc:1169:0"}],}
expires
Thu, 31 Oct 2024 13:30:00 GMT
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/javascript; charset=UTF-8
vary
Accept-Encoding
last-modified
Thu, 31 Oct 2024 12:00:00 GMT
access-control-allow-headers
Cache-Control
strict-transport-security
max-age=31536000; includeSubDomains
cache-control
private, max-age=900
cross-origin-resource-policy
cross-origin
access-control-allow-credentials
true
content-security-policy-report-only
script-src 'none'; form-action 'none'; frame-src 'none'; report-uri https://csp.withgoogle.com/csp/scaffolding/ascgcycc:1169:0
access-control-allow-origin
*
cross-origin-opener-policy-report-only
same-origin; report-to=coop_reporting
content-length
69590
x-xss-protection
0
server
Google Tag Manager
style.min.css
engineering.fb.com/wp-includes/css/dist/block-library/ 		110 KB
15 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-includes/css/dist/block-library/style.min.css?m=1729616464g
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
fb3a89cc6347e098063bd15f285bc90411846ddce6f17812364feedab67a67f5
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 253 443
etag
W/"6717da50-1b72b"
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:29:59 GMT
content-type
text/css
last-modified
Tue, 22 Oct 2024 17:01:04 GMT
server
nginx
vary
Accept-Encoding
/
engineering.fb.com/_static/ 		15 KB
4 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/_static/??-eJzTLy/QzcxLzilNSS3WzyrWz01NyUxMzUnNTc0rQeEU5CRWphbp5qSmJyZX6uVm5uklFxfr6OPTDpRD5sM02efaGpobWZoZmpmYmQIARN8u6g==
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
3d2c10cf69410c10177fc6e56937d05151b182841fa6aee36f651d587d91fbb8
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 254 443
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
text/css;charset=utf-8
vary
Accept-Encoding
server
nginx
last-modified
Tue, 22 Oct 2024 17:01:05 GMT
related-posts-block-styles.min.css
engineering.fb.com/wp-content/mu-plugins/search/elasticpress/dist/css/ 		222 B
456 B 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-content/mu-plugins/search/elasticpress/dist/css/related-posts-block-styles.min.css?m=1728928671g
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
9790593b4acafa770479511a888914881594976c5dcad980c82e781c5625ff44
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 253 443
etag
"670d5b9f-de"
accept-ranges
bytes
x-cache
HIT
content-length
222
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
text/css
last-modified
Mon, 14 Oct 2024 17:57:51 GMT
server
nginx
/
engineering.fb.com/_static/ 		462 KB
58 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/_static/??/wp-content/plugins/wp-gdpr-consent/dist/gdprconsent.css,/wp-content/themes/code-fb-com/dist/css/child-theme.min.css?m=1720616012
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
8eded96561f20dbfc6d1a779163b7f22fc09b9172fa06091b3bcd6ba6f1d7b65
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 253 443
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
text/css;charset=utf-8
vary
Accept-Encoding
server
nginx
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
gdprconsent.js
engineering.fb.com/wp-content/plugins/wp-gdpr-consent/dist/ 		7 KB
3 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-content/plugins/wp-gdpr-consent/dist/gdprconsent.js?ver=2.0.0
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
28d7cefcb8d905642b38655f85c9c3ff9ab995b8ccb9e4d4533ff0be0f4df530
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 253 443
etag
W/"668e844c-1b00"
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/javascript
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
vary
Accept-Encoding
/
engineering.fb.com/_static/ 		118 KB
41 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/_static/??-eJzTLy/QzcxLzilNSS3WzwKiwtLUokoopZebmaeXVayjj0+Rbm5melFiSSqy4uT8vJLUvBL9kozUXKCW0ryU1KLikqLEApDugvyCgtQiqHL7XFtDcyNLM0MzEzPTLAD4IjQL
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
3bd47bed84470b3207347025097bc09de1d98f29b1de9e7f7539819f55a2f307
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 253 443
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/javascript
vary
Accept-Encoding
server
nginx
last-modified
Tue, 22 Oct 2024 17:01:05 GMT
FacebookReader-Medium.woff2
engineering.fb.com/wp-content/themes/code-fb-com/fonts/ 		35 KB
35 KB 		Font
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/fonts/FacebookReader-Medium.woff2
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
3308641936bc2eac40fb9c9df0cfd27211c5a59bfb7be229f4f6b152b0e07a9d
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Origin
https://engineering.fb.com
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=300, must-revalidate
x-rq
hhn2 111 253 443
etag
"668e844c-8aa0"
access-control-allow-methods
GET, HEAD
accept-ranges
bytes
access-control-allow-origin
*
x-cache
HIT
content-length
35488
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/font-woff2
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
FacebookReader-Regular.woff2
engineering.fb.com/wp-content/themes/code-fb-com/fonts/ 		34 KB
35 KB 		Font
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/fonts/FacebookReader-Regular.woff2
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
98e066f80b90afe0dd247b303b1be67b9870fae8fac6df38bcb03bc75af36478
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Origin
https://engineering.fb.com
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=300, must-revalidate
x-rq
hhn2 111 253 443
etag
"668e844c-89a4"
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Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 109 140 443
etag
"81c92cb2939607f4"
accept-ranges
bytes, bytes
x-cache
HIT
content-length
73430
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/webp
last-modified
Sun, 27 Oct 2024 00:06:54 GMT
server
nginx
vary
Accept
Eng-Blog-Self-Serve-Hero-Images-DATACENTERS-501-Blue.jpg
engineering.fb.com/wp-content/uploads/2022/08/ 		48 KB
49 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/uploads/2022/08/Eng-Blog-Self-Serve-Hero-Images-DATACENTERS-501-Blue.jpg?w=580&h=326&crop=1
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
5fd1af20aaa26ab8fde465056a862d05b024d21276ca2c052263416d0be38383
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 109 206 443
etag
"d0e4c26a5db0f514"
accept-ranges
bytes, bytes
x-cache
HIT
content-length
49640
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/webp
last-modified
Sun, 27 Oct 2024 00:34:32 GMT
server
nginx
vary
Accept
meta_logo.png
engineering.fb.com/wp-content/themes/code-fb-com/img/ 		14 KB
14 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/img/meta_logo.png
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
50e7e31d30ee2ce7b70c0fa524c2c270245a42fc1f6842a24d73b2d6e45d0e00
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 254 443
etag
"668e844c-3791"
accept-ranges
bytes
x-cache
HIT
content-length
14225
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/png
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
android.png
engineering.fb.com/wp-content/themes/code-fb-com/img/ 		2 KB
2 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/img/android.png
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
d2bec5f5316d88ccd7002de34073446f76ca5d7f40d04a999bc743cc42345cdf
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 254 443
etag
"668e844c-911"
accept-ranges
bytes
x-cache
HIT
content-length
2321
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/png
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
ios.png
engineering.fb.com/wp-content/themes/code-fb-com/img/ 		1 KB
1 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/img/ios.png
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
a307103cb2b2b6949644369c9a229f412901c9c8546fd677459f14948a02a629
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 253 443
etag
"668e844c-421"
accept-ranges
bytes
x-cache
HIT
content-length
1057
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/png
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
web.png
engineering.fb.com/wp-content/themes/code-fb-com/img/ 		487 B
722 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/img/web.png
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
580605d3ce0000bcf1f48a04b908a7d6d4a6bd8bb37b988d85768dea93ab02ac
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 253 443
etag
"668e844c-1e7"
accept-ranges
bytes
x-cache
HIT
content-length
487
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/png
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
backend.png
engineering.fb.com/wp-content/themes/code-fb-com/img/ 		2 KB
2 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/img/backend.png
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
19284533915784ca8dab4f71230450f0a71789ea2efc70c3e750cf2dca542bb2
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 254 443
etag
"668e844c-899"
accept-ranges
bytes
x-cache
HIT
content-length
2201
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/png
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
hardware.png
engineering.fb.com/wp-content/themes/code-fb-com/img/ 		388 B
624 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/img/hardware.png
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
7fdc47e6ee4d23f0b2cfd864b6a6e2480e93de89519fe31e0a964e7a0a6aff1f
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
x-rq
hhn2 111 254 443
etag
"668e844c-184"
accept-ranges
bytes
x-cache
HIT
content-length
388
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/png
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
sdk.js
connect.facebook.net/en_US/ 		3 KB
2 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://connect.facebook.net/en_US/sdk.js
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/_static/??/wp-content/themes/code-fb-com/dist/js/child-theme.min.js,/wp-content/themes/code-fb-com/js/prism.js?m=1720616012j
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
2a03:2880:f083:100:face:b00c:0:3 Frankfurt am Main, Germany, ASN32934 (FACEBOOK, US),
Reverse DNS
Software
/
Resource Hash
83f6c06ccb56212338e36f0bc05035b97916b23505015cd0d2662de5ae512886
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; preload; includeSubDomains
X-Content-Type-Options nosniff
X-Frame-Options DENY

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

content-md5
eMW7wOyEY+xLz3vgZcpo7A==
access-control-expose-headers
X-FB-Content-MD5
content-encoding
gzip
etag
"5c7340fa8157282e7511277f4bd77e72"
report-to
{"max_age":2592000,"endpoints":[{"url":"https:\/\/www.facebook.com\/browser_reporting\/coop\/?minimize=0"}],"group":"coop_report","include_subdomains":true}, {"max_age":86400,"endpoints":[{"url":"https:\/\/www.facebook.com\/browser_reporting\/coep\/?minimize=0"}],"group":"coep_report"}, {"max_age":21600,"endpoints":[{"url":"https:\/\/www.facebook.com\/ajax\/browser_error_reports\/"}],"group":"permissions_policy"}
x-content-type-options
nosniff
expires
Thu, 31 Oct 2024 13:30:33 GMT
alt-svc
h3=":443"; ma=86400
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/x-javascript; charset=utf-8
vary
Accept-Encoding
cross-origin-embedder-policy-report-only
require-corp;report-to="coep_report"
priority
u=3,i
x-frame-options
DENY
strict-transport-security
max-age=31536000; preload; includeSubDomains
reporting-endpoints
coop_report="https://www.facebook.com/browser_reporting/coop/?minimize=0", coep_report="https://www.facebook.com/browser_reporting/coep/?minimize=0", permissions_policy="https://www.facebook.com/ajax/browser_error_reports/"
x-fb-content-md5
9c054664377cc56f96742dc1316dee04
cache-control
public,max-age=1200,stale-while-revalidate=3600
timing-allow-origin
*
cross-origin-opener-policy
same-origin-allow-popups
x-fb-connection-quality
EXCELLENT; q=0.9, rtt=20, rtx=0, c=23, mss=1232, tbw=4472, tp=9, tpl=0, uplat=0, ullat=-1
x-fb-debug
dy8TBIeBy9Hx8pwqYXclcT89wV9BnKGpTz0Vp4sAQuV3lHytEqLMCv/huRul+F+ivlfkX83u2QnaTtPdD7GvCA==
cross-origin-resource-policy
cross-origin
permissions-policy
accelerometer=(), attribution-reporting=(), autoplay=(), bluetooth=(), camera=(), ch-device-memory=(), ch-downlink=(), ch-dpr=(), ch-ect=(), ch-rtt=(), ch-save-data=(), ch-ua-arch=(), ch-ua-bitness=(), ch-viewport-height=(), ch-viewport-width=(), ch-width=(), clipboard-read=(), clipboard-write=(), compute-pressure=(), display-capture=(), encrypted-media=(), fullscreen=(self), gamepad=(), geolocation=(), gyroscope=(), hid=(), idle-detection=(), interest-cohort=(), keyboard-map=(), local-fonts=(), magnetometer=(), microphone=(), midi=(), otp-credentials=(), payment=(), picture-in-picture=(), private-state-token-issuance=(), publickey-credentials-get=(), screen-wake-lock=(), serial=(), shared-storage=(), shared-storage-select-url=(), private-state-token-redemption=(), usb=(), unload=(self), window-management=(), xr-spatial-tracking=();report-to="permissions_policy"
document-policy
force-load-at-top
access-control-allow-origin
*
content-length
1688
origin-agent-cluster
?1
wp-emoji-release.min.js
engineering.fb.com/wp-includes/js/ 		18 KB
5 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-includes/js/wp-emoji-release.min.js?ver=6.6.2
Requested by
Host: engineering.fb.com
URL: https://engineering.fb.com/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
4e6ce5444c7f396cef0eb1fa3611034151e485dd06fbe5573a5583e1eebc98c3
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 253 443
etag
W/"6717da51-4926"
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/javascript
last-modified
Tue, 22 Oct 2024 17:01:05 GMT
server
nginx
vary
Accept-Encoding
sdk.js
connect.facebook.net/en_US/ 		251 KB
74 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://connect.facebook.net/en_US/sdk.js?hash=13255c62324eb226d75411929ecaa251
Requested by
Host: connect.facebook.net
URL: https://connect.facebook.net/en_US/sdk.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
2a03:2880:f083:100:face:b00c:0:3 Frankfurt am Main, Germany, ASN32934 (FACEBOOK, US),
Reverse DNS
Software
/
Resource Hash
159b8f46295af9765180a1a3b8fc46d26791dfd269e749ef9cb7a1c164c212be
Security Headers
Name Value
Strict-Transport-Security max-age=31536000; preload; includeSubDomains
X-Content-Type-Options nosniff
X-Frame-Options DENY

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Origin
https://engineering.fb.com
Referer
https://engineering.fb.com/

Response headers

content-md5
Of7IhPhh8LVw2I2q/xI5pQ==
access-control-expose-headers
X-FB-Content-MD5
content-encoding
gzip
etag
"6c757a0bd91deb490b4093396f87d6a7"
report-to
{"max_age":2592000,"endpoints":[{"url":"https:\/\/www.facebook.com\/browser_reporting\/coop\/?minimize=0"}],"group":"coop_report","include_subdomains":true}, {"max_age":86400,"endpoints":[{"url":"https:\/\/www.facebook.com\/browser_reporting\/coep\/?minimize=0"}],"group":"coep_report"}, {"max_age":21600,"endpoints":[{"url":"https:\/\/www.facebook.com\/ajax\/browser_error_reports\/"}],"group":"permissions_policy"}
x-content-type-options
nosniff
expires
Fri, 31 Oct 2025 11:48:02 GMT
alt-svc
h3=":443"; ma=86400
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
application/x-javascript; charset=utf-8
vary
Accept-Encoding
cross-origin-embedder-policy-report-only
require-corp;report-to="coep_report"
priority
u=3,i
x-frame-options
DENY
strict-transport-security
max-age=31536000; preload; includeSubDomains
reporting-endpoints
coop_report="https://www.facebook.com/browser_reporting/coop/?minimize=0", coep_report="https://www.facebook.com/browser_reporting/coep/?minimize=0", permissions_policy="https://www.facebook.com/ajax/browser_error_reports/"
x-fb-content-md5
7c6ab70f752c2e90e8e36d8b32c9d628
cache-control
public,max-age=31536000,stale-while-revalidate=3600,immutable
timing-allow-origin
*
cross-origin-opener-policy
same-origin-allow-popups
x-fb-connection-quality
UNKNOWN; q=-1, rtt=-1, rtx=0, c=20, mss=1232, tbw=1825, tp=5, tpl=0, uplat=1, ullat=-1
x-fb-debug
RnuflDdNIqCs/P2Rbrhxwlbd5O/sBfC5w/7vRAOYDDFlyZjnq+gLUy4PUtTW2jcF32oMXW5VLfOdeBNeajlJWA==
cross-origin-resource-policy
cross-origin
permissions-policy
accelerometer=(), attribution-reporting=(), autoplay=(), bluetooth=(), camera=(), ch-device-memory=(), ch-downlink=(), ch-dpr=(), ch-ect=(), ch-rtt=(), ch-save-data=(), ch-ua-arch=(), ch-ua-bitness=(), ch-viewport-height=(), ch-viewport-width=(), ch-width=(), clipboard-read=(), clipboard-write=(), compute-pressure=(), display-capture=(), encrypted-media=(), fullscreen=(self), gamepad=(), geolocation=(), gyroscope=(), hid=(), idle-detection=(), interest-cohort=(), keyboard-map=(), local-fonts=(), magnetometer=(), microphone=(), midi=(), otp-credentials=(), payment=(), picture-in-picture=(), private-state-token-issuance=(), publickey-credentials-get=(), screen-wake-lock=(), serial=(), shared-storage=(), shared-storage-select-url=(), private-state-token-redemption=(), usb=(), unload=(self), window-management=(), xr-spatial-tracking=();report-to="permissions_policy"
document-policy
force-load-at-top
access-control-allow-origin
*
content-length
75451
origin-agent-cluster
?1
favicon.ico
engineering.fb.com/wp-content/themes/code-fb-com/ 		5 KB
2 KB 		Other
General
Check archive.org
Download Go to
Full URL
https://engineering.fb.com/wp-content/themes/code-fb-com/favicon.ico
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2a04:fa87:fffd::c000:42ec , Ireland, ASN2635 (AUTOMATTIC, US),
Reverse DNS
Software
nginx /
Resource Hash
b96d739c3a8ac4ef0b34212c8a2b7f23dcb7b039e0dd14ef170d8e9232972bf7
Security Headers
Name Value
Strict-Transport-Security max-age=31536000;includeSubdomains;preload

Request headers

User-Agent
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36
Referer
https://engineering.fb.com/

Response headers

strict-transport-security
max-age=31536000;includeSubdomains;preload
cache-control
max-age=31536000
content-encoding
br
x-rq
hhn2 111 254 443
etag
W/"668e844c-15b6"
accept-ranges
bytes
x-cache
HIT
date
Thu, 31 Oct 2024 13:30:00 GMT
content-type
image/x-icon
last-modified
Wed, 10 Jul 2024 12:53:32 GMT
server
nginx
vary
Accept-Encoding

Failed requests

These URLs were requested, but there was no response received. You will also see them in the list above.

Domain
engineering.fb.com
URL
blob:https://engineering.fb.com/285670ee-3747-4f93-a4bc-2b43e98e9aa1

Verdicts & Comments Add Verdict or Comment

50 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

object| _wpemojiSettings object| _domassistevents function| gdprSafeTrack function| jQuery function| Popper object| loadmore_params object| search_params function| LazyLoad function| createLightbox function| createFacebookPlayer function| checkFacebookUrl function| twitterSharePopup function| fbShare function| shareHackerNews function| twitterFollow function| tabHandler function| loadPosts function| newPostsInit object| jQuerynavbarSearchbarToggler object| jQuerynavbarMenuToggler object| jQuerynavbarMobileSearch object| jQuerysearchContainer object| jQuerynavContainer function| hideSearchContainer function| showSearchContainer function| hideNavContainer function| showNavContainer function| truncateTitle function| validateAndSanitize function| jobEvents function| jobEventTracking function| readMoreInTracking function| videoAjaxHandler function| createVideoPlayer function| resetPlaylist function| setPlaylists function| setActivePlaylist function| categoryDropdownInit function| videoInit object| _self object| Prism function| DOMPurify object| bootstrap object| google_tag_manager object| google_tag_data object| dataLayer object| twemoji object| wp object| FB object| __buffer

0 Cookies

1 Console Messages

Source Level URL
Text
network error URL: https://facebookmicrosites.github.io/favicon.ico
Message:
Failed to load resource: the server responded with a status of 404 ()

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header Value
Strict-Transport-Security max-age=31557600

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

code.facebook.com
code.fb.com
connect.facebook.net
engineering.fb.com
facebookmicrosites.github.io
www.googleoptimize.com
engineering.fb.com
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