Exploring systems, souls, and stories – one post at a time
A VPN is a set of tools which allow networks at different locations to be securely connected, using a public network as the transport layer. A VPN produces a virtual “dedicated circuit” over the internet and use cryptography to secure it.
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Often I am required required to run a public ssh server, so its a good idea to restrict the OpenSSH server as much as possible.
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On Unixreview.com came across a secrity tool to be used for SSH servers. Denyhost is a python script which finds out invalid login attempts from the log files and can add the IP address from where the login attempt was made to /etc/hosts.deny file automatically. Can be run manually, through command line or as a dameon. Worth giving a try.
mod_security is a an Apache module meant to work as an intrusion detection and prevention engine for web applications or a web application firewall. It is stable and worth giving it a try. It has a very beautiful way of making Apache installation in chroot jail.