Yaroslav Polyakov

Linux (since 1997), networking, security (penetration testing, audits). Big fan of Jamstack and modern static websites. I enjoy creating new tools to myself and share it with community

Novosibirsk, Russia Joined on Oct 27, 2022 https://github.com/yaroslaff/

Work

Founder of www-security.com (mostly freelance), ready for hire.

Yaroslav Polyakov

Jan 29

Your own Certificate Authority (CA) in ONE simple command

#ssl #tls #https #openssl

1 min read

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Yaroslav Polyakov

Jan 25

Great design trick I learned in X.509 (critical extension)

#ssl #softwareengineering #x509 #rfc5280

1 min read

Yaroslav Polyakov

Dec 18 '23

Simple decorator to retry after exception

#python #decorator #exception #requests

1 min read

Yaroslav Polyakov

Oct 12 '23

apache2 allows CORS with credentials for any address

#apache2 #cors #security #webdev

1 min read

Yaroslav Polyakov

Jan 18 '23

Mix static & client-side rendering on same page with SvelteKit

#jamstack #static #csr #sveltekit

2 min read

Yaroslav Polyakov

Jan 12 '23

Shell oneliner to generate passwords

#password #generate #oneline #shell

1 min read

Yaroslav Polyakov

Jan 12 '23

Drop [almost] all outbound mail in postfix for tests

#postfix #testing #mailman #blackhole

2 min read

Yaroslav Polyakov

Jan 9 '23

How to get country by IP address

#geolocation #country #ip

1 min read

Yaroslav Polyakov

Jan 4 '23

Every C program has main()? (False)

#c #main #myth

1 min read

Yaroslav Polyakov

Jan 4 '23

apt-file: which deb package to install to get X?

#apt #aptfile #debian

1 min read

Yaroslav Polyakov

Jan 1 '23

fail2ban regex works as CLI param, but not as file (Solution)

#fail2ban #solution #troubleshooting

1 min read

Yaroslav Polyakov

Dec 25 '22

Svelte-kit (vite) with HMR over NGINX (Solution)

#sveltekit #nginx #hmr #vite

1 min read

Yaroslav Polyakov

Dec 3 '22

Create-react-app and apt freezes + script to enable/disable IPv6

#ipv6 #react #wireguard #apt

1 min read

Yaroslav Polyakov

Nov 25 '22

sql-export - create .md / .json files from database content

#hugo #json #markdown #sql

2 min read

Yaroslav Polyakov

Oct 27 '22

ws-emit: easy websocket microservice

#websocket #socketio #python #webdev

1 min read

Yaroslav Polyakov

Oct 27 '22

topip: who abusing your server?

#security #logs #mail #web

1 min read

Yaroslav Polyakov

Oct 27 '22

evalidate: secure eval() for python

#python #security #eval

1 min read

Yaroslav Polyakov

Oct 27 '22

showcert: human-friendly openssl

#openssl #security #webdev #certificate

2 min read

Yaroslav Polyakov

Oct 27 '22

My first post

#helloworld

1 min read

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Yaroslav Polyakov

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Your own Certificate Authority (CA) in ONE simple command

Want to connect with Yaroslav Polyakov?

Great design trick I learned in X.509 (critical extension)

Simple decorator to retry after exception

apache2 allows CORS with credentials for any address

Mix static & client-side rendering on same page with SvelteKit

Shell oneliner to generate passwords

Drop [almost] all outbound mail in postfix for tests

How to get country by IP address

Every C program has main()? (False)

apt-file: which deb package to install to get X?

fail2ban regex works as CLI param, but not as file (Solution)

Svelte-kit (vite) with HMR over NGINX (Solution)

Create-react-app and apt freezes + script to enable/disable IPv6

sql-export - create .md / .json files from database content

ws-emit: easy websocket microservice

topip: who abusing your server?

evalidate: secure eval() for python

showcert: human-friendly openssl

My first post