Here is the translation with formatting preserved:

1. [BRAS][PPPoE] Fixed: ping of inactive client with Echo requests
2. Support for service profiles 19 (DNS response substitution). Description
3. For service 19, ability to specify AAAA records and support for wildcard (*) for domains. Description
4. Fixed: for profile 18, it is not required to set both DSCP and TBF simultaneously

You can check the current installed version with the command below

yum info fastdpi

If you have CentOS 6.x or CentOS 8.x installed, then switch the repository once with the command:

sed -i -e '/^mirrorlist=http:\/\//d' -e 's/^# *baseurl=http:\/\/mirror.centos.org/baseurl=http:\/\/vault .centos.org/' /etc/yum.repos.d/CentOS-*.repo

and then update as usual.

To install the test version, you should issue the following command:

yum --enablerepo vasexperts-beta update fastdpi

Downgrade to 13.1:

yum downgrade fastdpi-13.1 fastpcrf-13.1