Windows: Disable DES and Triple DES (3DES)

Hi,

a measure to protect your Windows System against Sweet32 attacks is to disable the DES and Triple DES.

To do this, add 2 Registry Keys to the SCHANNEL Section of the registry.
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Openssl: Setup an intermediate CA

Hi,

first ramp up your root CA as described in my previous post.
Steps to create a intermediate CA. Create the intermediate CA structure in filesystem
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Openssl: Create a root CA

Hi,

steps to create a CA. Create the CA structure in filesystem
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Mail: Connect TLS encrypted to a smtp server by telnet

Hi,

the SMTP protocol is ASCII based. In the past, the SMTP protocol goes unencrypted over the wire means you can simply send email by connecting to the SMTP port 25 and enter some SMTP commands via telnet:

michael@debdev ~ # telnet smtp.yourdomain.org 25
EHLO test.example.com
MAIL FROM:info@yourdomain.org
RCPT TO:receiver@receiversdomain.org
DATA
Subject: Testmessage
<ENTER>
<ENTER>
This is a test message. End with <ENTER><ENTER> and point

.
QUIT

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OpenSSL: Check if a certificate belongs to a private key

Hi,

if you want to check if a certificate has it s origin in a specific private key respectively the signing request use the following openssl commands:
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