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You should definitely try setting up IPv6. Essentially, your problem is rooted in the limited number of IPv4 addresses. With IPv6, you most certainly can have more than one IPv6 address on every VPS for free. Using IPv6 wherever possible tackles the root issue.
This would only work if all nameservers support IPv6, no? I would still need to use IPv4 for the nameservers that don't, which means continuing to pay for the extra IPv4. What I'm thinking of doing is choosing a single reliable exit in each geographic location that I run, and using it as the upstream DNS resolver for all the other relays in the region. Thus I can use one relay in the USA to serve my relay in Canada, and one relay in Moldova to serve other relays in Europe. I would only need to pay for an extra IPv4 for each geographic region, and wouldn't have to suffer from the nasty >200ms latency incurred through transoceanic cables. Regards, forest -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEvLrj6cuOL+I/KdxYBh18rEKN1gsFAmj7ch4ACgkQBh18rEKN 1gu6jBAArMfWI6mXe6Ce+9UUQ8FQPgxDYjiySBij3QqN3NmM2N0TGxU/+wjldLrP wE/1zFjuTTQfZsOXJcLd13kmiqpt4jFRVAe+d0vpdfMkIppbDRmYRlcGrn7k1YwI Sdac1Dd3bUxRU3XLF/tVKeDjAsU55qu7el7qkd7RdhPjQ1IYV6GIzJPANcaREzv1 m6DBkkTAgkqvBVAQTFbOWLkLYL8KGXYTSjp14ZxB0SH8wrDKaZ/Hb0ASHlDYO7J8 lgjgR1fjfj13IlyjyRLlSeZiXmvHgi1W3NBLwp6nR2V1uwQ+VB7IIkjg+TJ3EN3x wMt1xCmqX9wqsfUgjR5wHJMFNu1maAgdMRUTSWDj0g1P4A4Dvvq1zQJUPtRViZsM 7NzgyrEqWd9gXHAxbP/82eM8QYbzflXEwtz5YFLDhFnXx1sQfE911pE3fklYMnEX SnyslYhK76Xg+E59Q6sGgKYnWyJSPIr88/KouTYKdqbywmg3duEM8a0tp/lLte6o nuA/HI83+sGrSnxGF8cZy8GOY6+MepzUEwX8uQlYSE9RNu/owqF3pCRpyJ6E6udz QvlSzQy6a8d8CewUQ6G8cQETAoSadaEsPdZzaEAj/6jgThTcZKnMnUFx3G/6VM2c ykHHoe6dBLlmesiqirXOiT99Hel09yvlI07H82kmT2JmRcqgUak= =M4IK -----END PGP SIGNATURE-----