Disable SSH OS Banner on FreeBSD | By default, FreeBSD includes an SSH banner that identifies the exact OS. For best security, you may wish to disable broadcasting this information to the world. Here’s the tip!
Generate Elliptic Curve (ECDSA) SSH Keys | OpenSSH version 5.7 and later supports better Elliptic Curve key types. This offers better performance in shorter length keys vs other key types. Here is the how-to!
Two-Factor Auth Using Key and Password with OpenSSH 6.2 or Higher | Now that most distros are shipping OpenSSH 6.2 or later, check out this feature to enable two-factor auth with a key and also a password!
Install OpenSSH 6.x on Debian Wheezy from Wheezy Backports | OpenSSH 6.x has many awesome new features such as two-factor auth with key and a password. To get this newer version on Debian Wheezy, use backports. I’ll show you how!
Debian and Ubuntu Linux: Set openssh SeverKeyBits to 1024 | The upstream openssh project sets the value ServerKeyBits to 1024, but Debian and Ubuntu currently unfortunately have a lower security setting of 768 bits. I’ve filed a bug to fix this. In the meantime, here is how to make that change now!
Google Authenticator Two-Factor SSH Authentication for Debian Wheezy | Debian does not provide a package for Wheezy to use Google Authenticator as a pam module. However, you can grab and install the Jessie (Debian testing) deb. Here are some steps!
Use Google Authenticator For Two-Factor SSH Authentication in Linux | For a very secure and convenient way to add two-factor ssh auth to your Linux server, you can use Google Authenticator. I’ll show you how to set this up!
Gentoo Server – Enable X Forwarding over SSH | If running Gentoo as a server, X forwarding might not be working. The typical error you will see is: X11 forwarding request failed on channel 0 Here is the fix!