Linux service security ssh anti-brute force crack

Don't think that your server has no important data, no value, no one will be bored and attack you. The attackers are all batch-scanned with tools. You really can't help you with the hackers. So, first protect these tools. #br>

1. Always pay attention to the record of your server ssh login failure lastb

2. If you can, set it to the specified ip to log in.

3. Use some other software or method to add a malicious crack ip to the blacklist for a while, but this may bring a very bad problem. If you fake your ip login error a few times, you will log in yourself. Not on

4. Although you have set up a password that you feel is not very safe for the convenience of other people, you can rest assured that for most people, your password may be complicated. After they get it, they may change to a simple password like 123456, or add a new user and the password is still 123456. For this kind of extreme pit teammates, you must pay close attention.

5. Log in as a key file to avoid Weak passwords kind of situation

6. If you are a security conscious person can also, it must be noted that this case of pigs as teammates.