Application install using apt cannot install the latest version

[danniod]

by use default apt source http://mirrors.ustc.edu.cn/debian

❯ cat /etc/apt/sources.list
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ buster main non-free contrib
deb http://mirrors.tuna.tsinghua.edu.cn/debian-security buster/updates main
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ buster-updates main non-free contrib
deb http://mirrors.tuna.tsinghua.edu.cn/debian/ buster-backports main non-free contrib

The application fail2ban has installed version of 0.10.2-2 but the latest version is 0.11.2-1 and mirrors site (click here) has the latest version source.

❯ apt search fail2ban
Sorting... Done
Full Text Search... Done
fail2ban/stable,now 0.10.2-2.1 all [installed]
  ban hosts that cause multiple authentication errors
...
❯ sudo apt install fail2ban=0.11.2-1
[sudo] password for xxx:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '0.11.2-1' for 'fail2ban' was not found

CAN I use apt to install the latest version ?

addations:

❯ uname -a
Linux raspbian 5.4.83-OPENFANS+20210102-v8 #1 SMP Sat Jan 2 21:52:54 CST 2021 aarch64 GNU/Linux
❯ apt -v
apt 1.8.2.2 (arm64)

[aiminickwong]

@daddy-lin

Version 0.11.2-1 is newest, but it's not belongs to stable version buster, see here: https://packages.debian.org/search?keywords=fail2ban&searchon=names&suite=stable&section=all

It's belongs to unstale or testing version bullseye , see here https://packages.debian.org/search?keywords=fail2ban&searchon=names&suite=testing&section=all