It's the year 2020. Why are you still using OpenVZ 6 VPSes? Because they only cost one dollar per year. Since the kernel of OpenVZ 6 is extremely old (Linux 2.6.32), newer systems cannot function normally on an old kernel, so I had to stick to Debian 8 with my previous OpenVZ VPSes. But I found a modified Glibc (C language runtime library) that allows running Debian 10 normally on OpenVZ 6. WARNING I don't guarantee that the steps below are suitable for all OpenVZ VPSes, nor do I ensure the safety/integrity of this Glibc (I didn't look into its modifications, but speaking of security, the end-of-life OpenVZ 6 is probably the farthest thing from security). Backup your data , since in worst scenarios, you need to reinstall the OS. Steps The author only provided DEB packages,...

Configuring Hurricane Electric IPv6 Tunnel on OpenVZ, Enabling the Entire Address Pool and Using it Alongside Native IPv6
AlphaRacks is a cost-effective hosting provider, offering VPS with 1 CPU, 512MB RAM, and 10GB storage for just $9.9/year. However, this provider is quite stingy with IPv6 addresses, requiring users to justify their need for IPv6. It's said they provide up to 20 addresses? But they may not allocate the full amount. For example, when I explained I needed IPv6 to serve IPv6-only users, the provider replied: We've added 1 IPv6 address to your VPS. A single IPv6 address is insufficient for my needs. Fortunately, Hurricane Electric in the US offers IPv6 tunneling services , providing each user with 5 tunnels. Each tunnel includes a /64 address pool, and users can instantly activate a /48 address pool with one click. Despite this generous service, using it on OpenVZ VPS requires extra effort....