Jim's Depository

Give a Debian LAN IPv6 connectivity without waiting for native ISP support, using 6to4, radvd, and ip6tables. It helps gateway operators test dual-stack services while avoiding the security gap created when IPv6 bypasses an IPv4-only firewall.

Track down beachballs that ordinary cache clearing and Disk Utility can miss, from slow sector remapping to Safari’s overlooked Top Sites preview cache. The diagnostic steps offer a practical way to distinguish a failing drive from a fixable software stall before lost data makes the choice for you.