Great... can you answer my question? What client side dns libraries did source port randomization in 2006? AFAIK it wasn't until 2008 when most things were fi

Great... can you answer my question? What client side dns libraries did source port randomization in 2006? AFAIK it wasn't until 2008 when most things were fixed. People keep talking about the good old days before systemd where everything worked perfectly, but that ignores the fact that things were pretty broken. If you care about things like local caching and failover, things are still pretty broken. Most unix systems are horribly fragile out of the box. You either run something like dnsmasq or unbound locally or use a hack like https://github.com/kvz/nsfailover https://github.com/kvz/nsfailover. A large number of distributed systems completely grind to a halt when the primary name server fails (if only everyone used anycast...)