首先用root账户命令行登录，fail2ban需要centos7和centos8系统安装，低版本不支持

首先查看setuptools版本号，太高的版本不支持fail2ban

[root@izt4nhy3mj62nkq6xnraplz ~]# btpip list|grep setuptools

setuptools                61.2.0

WARNING: You are using pip version 21.3.1; however, version 22.0.4 is available.

You should consider upgrading via the '/www/server/panel/pyenv/bin/python3.7 -m pip install --upgrade pip' command.

[root@izt4nhy3mj62nkq6xnraplz ~]#

[root@izt4nhy3mj62nkq6xnraplz ~]# setuptools                61.2.0

-bash: setuptools: command not found

[root@izt4nhy3mj62nkq6xnraplz ~]# WARNING: You are using pip version 21.3.1; however, version 22.0.4 is available.

-bash: WARNING:: command not found

-bash: however,: command not found

[root@izt4nhy3mj62nkq6xnraplz ~]# You should consider upgrading via the '/www/server/panel/pyenv/bin/python3.7 -m pip install --upgrade pip' command.

-bash: You: command not found

[root@izt4nhy3mj62nkq6xnraplz ~]#
卸载它

[root@izt4nhy3mj62nkq6xnraplz ~]# btpip uninstall setuptools -y

Found existing installation: setuptools 61.2.0

Uninstalling setuptools-61.2.0:

  Successfully uninstalled setuptools-61.2.0

WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
安装低版本

[root@izt4nhy3mj62nkq6xnraplz ~]# btpip install setuptools==57.5.0

Collecting setuptools==57.5.0

  Downloading setuptools-57.5.0-py3-none-any.whl (819 kB)

     |████████████████████████████████| 819 kB 24.6 MB/s

Installing collected packages: setuptools

Successfully installed setuptools-57.5.0

WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.
.io/warnings/venv

WARNING: You are using pip version 21.3.1; however, version 22.0.4 is available.

You should consider upgrading via the '/www/server/panel/pyenv/bin/python3.7 -m pip install --upgrade pip' command.
下面重启面板

[root@izt4nhy3mj62nkq6xnraplz ~]# bt reload

Reload Bt-Panel..       done
下面语句查看fail2ban状态

[root@izt4nhy3mj62nkq6xnraplz ~]# fail2ban-client status

Status

|- Number of jail:      2

`- Jail list:   ftpd, sshd

状态2表示没问题了，您就可以使用了