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Calvin's Dev Logs
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Warning: connection is not using a post-quantum key exchange algorithm
#Security
#OpenSSH
#MacOS
#234
26 Mar 2026
Operations
Adding a catch all black hole blocks in Nginx
#Nginx
#Security
#228
05 Jan 2026
Operations
SSH hardening on Ubuntu
#Security
#Ubuntu
#SSH
#fail2ban
#145
24 Aug 2024
Operations
Check server TLS protocol support
#OpenSSL
#Security
#109
23 Nov 2021
Operations
How to set CAA DNS record?
#Security
#SSL
#DNS
#71
21 Mar 2018
Operations
SPF validation for your mail server
#Email
#SEO
#Security
#DNS
#19
29 Aug 2016
Operations
Hiding server identity and signature for Nginx and Passenger
#Security
#Nginx
#Passenger
#8
22 Aug 2016
Operations
Blocking malicious crawler in nginx
#Security
#Nginx
#Crawler
#Blacklist
#3
18 Aug 2016
Operations
Using custom DH Param in Nginx
#Security
#SSL
#Nginx
#DH Param
#1
18 Aug 2016
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