No Security Risks Detected
This domain appears to be safe and secure
100%
Score
Disclaimer: This assessment is based on automated analysis of publicly available information. Results are for informational purposes only. For critical applications, consult security professionals.
Scan Information
Last checked:September 18, 2025 20:57:48
Scan Complete
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Page Information
Target URL
https://ruudvanasseldonk.com/2023/01/11/the-yaml-document-from-hell
Page Title
The yaml document from hell
Site FaviconStatus
Active
Host Information
Domain
ruudvanasseldonk.com
Server
nginx
Country
United States
IP Address
34.75.5.233
ASN Information
396982
GOOGLE-CLOUD-PLATFORM
Technologies
Nginx
Web servers
HSTS
Security
HTTP/3
Miscellaneous
SSL Certificate
HTTPS Enabled
Secure
Certificate Issuer
994m3 Gateway Proxy BISO MITM CA
Valid From
2025-09-14 06:07:49
Valid Until
2025-10-14 06:08:19
Subject Name
ruudvanasseldonk.com
Performance Statistics
9
Total Requests
1
Domains
1
IP Addresses
41.65 KB
Transfer Size
Content Size60.34 KB
HTTP Headers
alt-svc
h3=":443"; ma=2592000
cache-control
max-age=7200
cf-team
2a0037af0e0000e8865d983400000001
content-encoding
br
content-length
8241
content-security-policy
default-src 'none'; font-src 'self'; img-src 'self'; object-src 'self'; frame-src 'self'; style-src 'unsafe-inline'
content-type
text/html; charset=utf-8
date
Thu, 18 Sep 2025 20:57:56 GMT
etag
"68cb123b-2031"
expires
Thu, 18 Sep 2025 22:57:56 GMT
server
nginx
server-timing
cfReqDur;dur=1001.496
strict-transport-security
max-age=15552000
13 headers detected
Technology Stack Analysis
Nginx
Web serversReverse proxies
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
HSTS
Security
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
HTTP/3
Miscellaneous
HTTP/3 is the third major version of the Hypertext Transfer Protocol used to exchange information on the World Wide Web.
External Links 36
GitHub
github.com
Target URL
https://github.com/ruuda
Codeberg
codeberg.org
Target URL
https://codeberg.org/ruuda
The entire json spec
www.json.org
Target URL
https://www.json.org/json-en.html
its specification
yaml.org
Target URL
https://yaml.org/spec/1.2.2/
errata page
yaml.org
Target URL
https://yaml.org/spec/1.2/errata.html
two changes
youtu.be
Target URL
https://youtu.be/-C-JoyNuQJs?t=965
to have discovered it
www.youtube.com
Target URL
https://www.youtube.com/watch?v=-C-JoyNuQJs
a multi-year effort by a team of experts
yaml.com
Target URL
https://yaml.com/blog/2021-10/new-yaml-spec/
an entire website
yaml-multiline.info
Target URL
https://yaml-multiline.info/
the 63 different multi-line string syntaxes
stackoverflow.com
Target URL
https://stackoverflow.com/a/21699210/135889
sexagesimal (base 60) number literals
yaml.org
Target URL
https://yaml.org/spec/1.1/#id858600
PyYAML
pypi.org
Target URL
https://pypi.org/project/PyYAML/6.0/
tag
yaml.org
Target URL
https://yaml.org/spec/1.2.2/#3212-tags
the Norway problem
hitchdev.com
Target URL
https://hitchdev.com/strictyaml/why/implicit-typing-removed/
but not any capitalization
yaml.org
Target URL
https://yaml.org/type/bool.html
made the choice
github.com
Target URL
https://github.com/go-yaml/yaml/tree/v3.0.1#compatibility
Earlier versions behave differently
github.com
Target URL
https://github.com/go-yaml/yaml/commit/b145382a4cda47600eceb779844b8090b5807c4f
it is used in GitHub Actions
docs.github.com
Target URL
https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#on
directives
yaml.org
Target URL
https://yaml.org/spec/1.2.2/#68-directives
complex mapping key
yaml.org
Target URL
https://yaml.org/spec/1.2.2/#example-mapping-between-sequences
meme-worthily
twitter.com
Target URL
https://twitter.com/memenetes/status/1600898397279502336
tools based on such an error-prone practice
helm.sh
Target URL
https://helm.sh/docs/chart_best_practices/templates/
Toml
toml.io
Target URL
https://toml.io/en/
Json with comments
code.visualstudio.com
Target URL
https://code.visualstudio.com/docs/languages/json#_json-with-comments
Json with commas and comments
nigeltao.github.io
Target URL
https://nigeltao.github.io/blog/2021/json-with-commas-comments.html
Nix
nixos.org
Target URL
https://nixos.org/manual/nix/stable/language/index.html
Nix package manager
nixos.org
Target URL
https://nixos.org/
export to json
nixos.org
Target URL
https://nixos.org/manual/nix/stable/language/builtins.html#builtins-toJSON
Python
www.python.org
Target URL
https://www.python.org/
json.dump
docs.python.org
Target URL
https://docs.python.org/3/library/json.html?highlight=json%20dump#json.dump
Dhall
dhall-lang.org
Target URL
https://dhall-lang.org/
Cue
cuelang.org
Target URL
https://cuelang.org/
Hashicorp Configuration Language
github.com
Target URL
https://github.com/hashicorp/hcl
RCL
rcl-lang.org
Target URL
https://rcl-lang.org/
Copyleft
creativecommons.org
Target URL
http://creativecommons.org/licenses/by-sa/3.0/
Source
github.com
Target URL
https://github.com/ruuda/blog
Requested Domains 1
ruudvanasseldonk.com
Apex domain
Categories
TechnologyTechnology