Enable hardware crypto acceleration on your Via Nano dedi
VIA PadLock Advanced Cryptography Engine (VIA PadLock ACE) is a technology used in many VIA processors that provides very fast hardware encryption and decryption.
Via Nano used in Online.net Kidechires and SCGen2 does support the Padlock extensions as well. In my tests enabling them in OpenSSL improves SHA1 performance by almost 4x, and drops the CPU load from HTTPS by 3x.
See my howto on rebuilding OpenSSL in Debian with Padlock support.
Let me know if it worked or not for you, also if it needs any clarifications or corrections.