Test SSH Key Locally Without Server

Tags: January 4, 2014 12:54 AM
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To test a generated ssh private/public key-pair without having to connect to a SSH server we can use ssh-keygen. Here's the example:

# ssh-keygen -y -f /location/of/the/private-key
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How To Block IP Address using IPTABLES

Tags: January 3, 2014 11:17 PM
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Make sure running the iptables command as root. Example below shows how to block traffic coming from IP 1.2.3.4.

# iptables -I INPUT -s 1.2.3.4 -j DROP
Turn on some logging on those rule, we insert it at line two. Assuming the first iptables command was the at line one.
# iptables -I INPUT 2 -s 1.2.3.4 -j LOG --log-prefix "Dropped an As*hole"
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