Oct 3 2014

Protect Servers Against Shellshock Bash Vulnerability.

On September 24, 2014, a GNU Bash vulnerability (Shellshock or “Bash Bug”), was discovered and published.
The vulnerability allows remote attackers to execute arbitrary code given specific conditions, by injecting strings of code following environment variable assignments.
Because of Bash’s large utilization (Ex: Linux, BSD, OsX), many computers are vulnerable to Shellshock Bash Bug.
All unpatched Bash versions between 1.14 through 4.3 seems to be compromised.
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Sep 26 2014

VirtualHost settings upgrading from Apache 2.2 to Apache 2.4.

Upgrading from Apache 2.2 to 2.4 is simply but some configuration updates are necessary, because a working Apache 2.2 VirtualHost setup will break silently when you upgrade to Apache 2.4.
A full and comprehensive guide to updating from Apache 2.2 to 2.4 is available in the apache.org website.
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Sep 12 2014

PGP Key Security generating and using SubKeys.

Loosing the private key it’s bad, but if someone steals the private key, it’s a disaster.
Thieves can not only decrypt personal data, they can also impersonate the owner by signing messages with his private key.
Yes, it is possible to revoke the stolen key, but that would mean probably loose years of signatures and basically creating a massive inconvenience to redistribute a new public key to the world. SubKeys can help to prevent this disaster.

Having separate SubKeys makes key management easier and protects you in certain occasions, for example it is possible to create a new SubKey when a previous one gets stolen, without losing previous signatures.
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Sep 11 2014

SSH Authentication with PGP Keys.

PGP keys and SSH keys can share the same RSA algorithm and for this reason, with some little tuning it is possible to use a PGP SubKey to authenticate users into SSH Servers.
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Aug 14 2014

Paperkey, a good way to print your PGP Private Key.

A reasonable way to achieve a long term backup of Cryptographic Keys (OpernPGP, GnuPG, PGP, etc) is to print them out on paper.
This because printed paper (choosing the best ink type), has amazingly long retention qualities, absolutely longer than magnetic or optical media generally used to Back-UP data.
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