In case you have a problem with installing packages on the server and you see an error like this:

  - Curl error (60): Peer certificate cannot be authenticated with given CA certificates for https://repo.vasexperts.com/veos/8/BaseOS/x86_64/os/repodata/repomd.xml [SSL certificate problem: certificate has expired]Error: Failed to download metadata for repo «baseos»: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried

1. You need to check the date and time on the server/in the bios. The date and time must be up to date.
   
   The output of timedatectl should state: System clock synchronized: yes.
   If not specified, edit /etc/chrony.conf, then execute systemctl restart chronyd.
   
   You can also swap out the VEOS pool for the Centos pool: pool 2.veos.pool.ntp.org → pool 2.centos.pool.ntp.org
2. Verify that the root TLS certificate is not being spoofed:

   openssl s_client -connect abcdef.com:443

3. Check firewall settings — port 443 should be open.
4. Disable sslverify in /etc/dnf.conf (the line sslverify=0 should be added).