Подключаем репозиторий
dnf install http://repo.okay.com.mx/centos/9/x86_64/release/okay-release-1-10.el9.noarch.rpm
Устанавливаем Sngrep
dnf install sngrep
dnf install http://repo.okay.com.mx/centos/9/x86_64/release/okay-release-1-10.el9.noarch.rpm
dnf install sngrep
