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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 24 via manual from US — Scanned from DE
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 5 IPs in 3 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

IP Address AS Autonomous System
2 2606:50c0:800... 54113 (FASTLY)
1 1 157.240.252.10 32934 (FACEBOOK)
1 1 2a04:fa87:fff... 2635 (AUTOMATTIC)
34 2a04:fa87:fff... 2635 (AUTOMATTIC)
1 2a00:1450:400... 15169 (GOOGLE)
2 157.240.252.13 32934 (FACEBOOK)
40 5
2    2606:50c0:8003::153 (United States)

ASN54113 (FASTLY, US)
facebookmicrosites.github.io
1    157.240.252.10 (Frankfurt am Main, Germany)

ASN32934 (FACEBOOK, US)
PTR: edge-star-shv-01-fra3.facebook.com
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    2a00:1450:4001:827::200e (Frankfurt am Main, Germany)

ASN15169 (GOOGLE, US)
www.googleoptimize.com
2    157.240.252.13 (Frankfurt am Main, Germany)

ASN32934 (FACEBOOK, US)
PTR: xx-fbcdn-shv-01-fra3.fbcdn.net
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
83 KB
2 github.io
facebookmicrosites.github.io — Cisco Umbrella Rank: 733871
1 KB
1 googleoptimize.com
www.googleoptimize.com — Cisco Umbrella Rank: 3678
68 KB
1 facebook.com
code.facebook.com
103 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		 2024-08-02 -
2024-10-31		 3 months crt.sh

This page contains 1 frames:

Primary Page: https://engineering.fb.com/
Frame ID: 7E74181FF6DF4DFA55A72C902AE7D034
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

67 %
IPv6

5
Domains

6
Subdomains

5
IPs

3
Countries

1503 kB
Transfer

2642 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
529 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
2606:50c0:8003::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, 24 Oct 2024 19:15:57 GMT
etag
"5a7c83e9-71"
expires
Thu, 24 Oct 2024 19:25:57 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
114d4e9bf6f43cd100625e0814b5f0972f439f17
x-github-request-id
718B:3524E1:D700A9:DB525E:671A9CED
x-proxy-cache
MISS
x-served-by
cache-mxp6926-MXP
x-timer
S1729797358.797931,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
073940694526053853deed0e662ae5634a850e61ced6efdc5f81cdf8bfbb0818
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, 24 Oct 2024 19:15:58 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 111 254 443

Redirect headers

content-type
text/html; charset=utf-8
date
Thu, 24 Oct 2024 19:15:58 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
728 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
2606:50c0:8003::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
8fd23e6883caf19eac388565c94ff9b63103e7be
content-encoding
gzip
etag
W/"5a7c83e9-46e"
age
0
x-github-request-id
6E47:D771F:15C9382:163D082:671A9CED
x-proxy-cache
MISS
x-cache
MISS
date
Thu, 24 Oct 2024 19:15:58 GMT
content-type
text/html; charset=utf-8
x-served-by
cache-mxp6926-MXP
x-cache-hits
0
vary
Accept-Encoding
strict-transport-security
max-age=31557600
x-timer
S1729797358.990076,VS0,VE105
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/ 		189 KB
68 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
2a00:1450:4001:827::200e Frankfurt am Main, Germany, ASN15169 (GOOGLE, US),
Reverse DNS
Software
Google Tag Manager /
Resource Hash
320bd1a92405af15459425fded9ecf79636cacd34ae43411f19266e36f2356bc
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, 24 Oct 2024 19:15:58 GMT
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
date
Thu, 24 Oct 2024 19:15:58 GMT
content-type
application/javascript; charset=UTF-8
vary
Accept-Encoding
last-modified
Thu, 24 Oct 2024 18:15:49 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
69430
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, 24 Oct 2024 19:15:58 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, 24 Oct 2024 19:15:58 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 111 254 443
etag
"670d5b9f-de"
accept-ranges
bytes
x-cache
HIT
content-length
222
date
Thu, 24 Oct 2024 19:15:58 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 111 254 443
accept-ranges
bytes
x-cache
HIT
date
Thu, 24 Oct 2024 19:15:58 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 111 254 443
etag
W/"668e844c-1b00"
accept-ranges
bytes
x-cache
HIT
date
Thu, 24 Oct 2024 19:15:58 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 111 254 443
accept-ranges
bytes
x-cache
HIT
date
Thu, 24 Oct 2024 19:15:58 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, 24 Oct 2024 19:15:58 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
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Full URL
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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 94 443
etag
"ded78be5dc317817"
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HIT
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content-type
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server
nginx
vary
Accept
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engineering.fb.com/wp-content/uploads/2024/08/ 		34 KB
34 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://engineering.fb.com/wp-content/uploads/2024/08/AI-@Scale-2024-YouTube-Thumbnail-WanchaoKimishEvan.webp?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
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Security Headers
Name Value
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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 109 150 443
etag
"eff69b7fb7f26e44"
accept-ranges
bytes, bytes
x-cache
HIT
content-length
34338
date
Thu, 24 Oct 2024 19:15:58 GMT
content-type
image/webp
last-modified
Fri, 23 Aug 2024 16:29:59 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, 24 Oct 2024 19:15:58 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 111 253 443
etag
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accept-ranges
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x-cache
HIT
content-length
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Thu, 24 Oct 2024 19:15:58 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
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x-cache
HIT
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date
Thu, 24 Oct 2024 19:15:58 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, 24 Oct 2024 19:15:58 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, 24 Oct 2024 19:15:58 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
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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
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388
date
Thu, 24 Oct 2024 19:15:58 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
157.240.252.13 Frankfurt am Main, Germany, ASN32934 (FACEBOOK, US),
Reverse DNS
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Software
/
Resource Hash
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Security Headers
Name Value
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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
OOC/P5B3YuME05eOKEUA8Q==
access-control-expose-headers
X-FB-Content-MD5
content-encoding
gzip
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"fd0c24a1b4254f2de144348a486bfe90"
report-to
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x-content-type-options
nosniff
expires
Thu, 24 Oct 2024 19:23:00 GMT
alt-svc
h3=":443"; ma=86400
date
Thu, 24 Oct 2024 19:15:58 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
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x-fb-content-md5
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cache-control
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timing-allow-origin
*
cross-origin-opener-policy
same-origin-allow-popups;report-to="coop_report"
x-fb-connection-quality
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x-fb-debug
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cross-origin-resource-policy
cross-origin
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document-policy
force-load-at-top
access-control-allow-origin
*
cross-origin-opener-policy-report-only
restrict-properties;report-to="coop_report"
content-length
1689
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
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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/"66e0662d-4926"
accept-ranges
bytes
x-cache
HIT
date
Thu, 24 Oct 2024 19:15:58 GMT
content-type
application/javascript
last-modified
Tue, 10 Sep 2024 15:30:53 GMT
server
nginx
vary
Accept-Encoding
sdk.js
connect.facebook.net/en_US/ 		283 KB
81 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://connect.facebook.net/en_US/sdk.js?hash=198350cfdb35bc026d0fb07dc0ed786c
Requested by
Host: connect.facebook.net
URL: https://connect.facebook.net/en_US/sdk.js
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
157.240.252.13 Frankfurt am Main, Germany, ASN32934 (FACEBOOK, US),
Reverse DNS
xx-fbcdn-shv-01-fra3.fbcdn.net
Software
/
Resource Hash
aac9e925b233eb475145b481a01a45ea0da4c3938b699e0bea6dd5995c3de811
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
NdonsiheXJhgMyE0cxVjKg==
access-control-expose-headers
X-FB-Content-MD5
content-encoding
gzip
etag
"7016fa60b1101e64aae8d35c1f6adee5"
report-to
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x-content-type-options
nosniff
expires
Fri, 24 Oct 2025 18:07:54 GMT
alt-svc
h3=":443"; ma=86400
date
Thu, 24 Oct 2024 19:15:58 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
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x-fb-content-md5
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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
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x-fb-debug
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cross-origin-resource-policy
cross-origin
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document-policy
force-load-at-top
access-control-allow-origin
*
content-length
82594
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 111 253 443
etag
W/"668e844c-15b6"
accept-ranges
bytes
x-cache
HIT
date
Thu, 24 Oct 2024 19:15:59 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/c35a080c-7e48-4031-856b-ea8ad3644363

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| FB object| twemoji object| wp object| __buffer

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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
157.240.252.10
157.240.252.13
2606:50c0:8003::153
2a00:1450:4001:827::200e
2a04:fa87:fffd::c000:421d
2a04:fa87:fffd::c000:42ec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