Shell scripts to prevent sshd from being violently cracked

1, Tail-f/var/log/secure

You will find a lot of login errors. This means that your machine is being violently cracked.

2. Create a new shell script

Save exit.

3, join the timing CRONTAB-E

I'm judging every 10 minutes here, you can put a little longer.

4. Take a look at/etc/hosts.deny

At this point, an IP is blocked from the outside.

5. Check secure again

Tail-f/var/log/secure

The instructions were successful.

Shell scripts to prevent sshd from being violently cracked