Renew AD FS Service Communications certificate
SSL Certification renew If your communication with another APP is encrypted with a trusted third part CA cert, and the […]
Blacklisted IPs
Some organization blacklist IPs which have bad reputation. https://www.team-cymru.org/Services/Bogons/fullbogons-ipv4.txt https://www.team-cymru.org/Services/Bogons/fullbogons-ipv6.txt
DoS – TCP SYN cookies attack
The TCP Syn is DoS (Denial of Service) attack. It consumes resources on your Linux server. The attacker begin with […]
Mask your email from Spam
Masking by character encoding Common character encoding, used when masking email addresses in the source code, is based on HTML […]
CredSSP Encryption Oracle Remediation issue for RDP
An update released by Microsoft (KB 4093492)on May 8, 2018, for Windows 10 Operation System was targeted to change the default […]
Integrate Certbot to 3CX on Debian
1. install snapd on Debian $ sudo apt update $ sudo apt install snapd $ snap install core […]
L2TP/IPSec VPN dropped silently
You may come across the issue that the MAC users are able to connect to windows VPN server, but windows […]
Block IP addresses by Country in 3CX
You may want to block the login or phone registration by IP address in 3CX if you are sure your […]
IPBAN – Windows
In Linux we can use fail2ban to prevent brute attack based on the login failure attempt. Windows has a similar […]
Cisco WLAN controller password cracking
First you need to get a copy of the configuration file, how ? Use your sniffing skills, which I will […]