OpenBSD Implementation
The TIME_WAIT problem

Detailed analysis from Michael Silberstack
"Improving TCP/IP Security Through Randmization Without Sacrificing Interoperability"

On extremely busy systems, the same (src ip, src port, dest ip, dest port) tuple can get reused
before the TIME_WAIT limit has expired
Different OSs deal with this differently
Some OSs (Windows XP, FreeBSD) will stall the connection