I want to allow host-2 to copy a file securely from host-1, so the easiest way is to use “scp” command which use “ssh” as a transport to copy the file.

If you want to do it manually it is straight forward “scp” invocation:

host-2$ scp host-1:data.csv .

But if you want to automate it you have to use “ssh” keys, but this means leaving a private ssh key on host-2 that can access host-1 without any restriction, i.e.

Fail2ban is a program that scan your log files for any malicious behavior, and automatically block the offending IP.

PuTTY Tray is an improved version of PuTTY. It features some cosmetic changes, and a number of addons to make it more useful and much more fun to use.

The features that I really like:

• Minimizing to the system tray
• Portability: optionally stores session configuration in files (for example: on a USB drive) like portaPuTTY
• Reconnects when your PC wakes up from stand-by / Attempts to reconnect when the connection fails

http://www.xs4all.nl/~whaa/putty/