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a while back when i was still involved in this stuff heavily i had read about a new way to send data by tunneling it over ICMP. people would have chats to and fro simply by putting whatever they wanted to say into an ICMP packet hoping it would bypass any firewall that did not have packet analysis available (if you notice on a typical type 8 echo, all you see for data is the alphabet and then 1-9 i believe---someone realized that that data could be changed to anything)a while after that, a new form of data tunneling technique came across some forums i was in and i was wondering how many of you knew about it. it was a concept of tunneling any type of data using DNS packets. is this still in use today? i remember reading about the concept, new at the time, and it was pretty revolutionary. the idea is that you can piggyback any data onto the DNS packet and that will go right through a typical firewall. i believe the rest of that DNS portion is then stripped off. i am not sure of the rest, like i said, it was something i read about years ago that seemed to be the rage