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OpenSSH common mistakes, tips, and tricks

Posted 10-14-2014 at 11:09 PM by sag47
Here's a post about common mistakes I see made with SSH. A few shortcuts to being more productive when you have a complicated server network. And other neat tips and tricks.

authorized_keys Permissions

The most common problem I see new users attempting to use public key auth is to get the permissions wrong either on their home directory, .ssh directory, or authorized_keys file. Luckily, the openssh project provides a helpful FAQ answer.

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My iptables firewall

Posted 10-14-2014 at 10:33 PM by sag47
Tags iptables
Recently I posted about my firewall. Here I'm reposting that to my blog.

Here's a redacted version of my firewall rules. I'll point out a couple of things. This firewall is designed similarly to how the new RHEL7 firewalld behaves. When evaluating RHEL7 I saw some cool firewall tricks and incorporated it into my firewall (this way you can take advantage of doing things like dynamically adding and removing rules without having to refresh the firewall).

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