* 2018-11-06, [https://www.redhat.com/en/blog/using-criu-upgrade-vpn-servers-kernel-without-dropping-connections Using CRIU to upgrade a VPN server's kernel without dropping connections] | * 2018-11-06, [https://www.redhat.com/en/blog/using-criu-upgrade-vpn-servers-kernel-without-dropping-connections Using CRIU to upgrade a VPN server's kernel without dropping connections] |