I think that a lot of offensive tools to tunnel IP over DNS actually overcame these limitations in real time, at the expensive of throughput [1]. It obviously

I think that a lot of offensive tools to tunnel IP over DNS actually overcame these limitations in real time, at the expensive of throughput [1]. It obviously does require agreeing on some sort of protocol on both sides though. [1] https://github.com/yarrick/iodine https://github.com/yarrick/iodine