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earthquake / XFLTReaT

XFLTReaT tunnelling framework
MIT License
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DNS not supported in Windows ? #6

Closed wimg closed 5 years ago

wimg commented 6 years ago

When trying to use DNS on the client on Windows, I get an error telling me that's not supported. Is there a specific reason why it wouldn't work ? Iodine and other tunneling tools seem to be able to do it.

earthquake commented 6 years ago

hi Wim!

Long story short, DNS packets are not capable to carry huge amount of data so the packets need to be fragmented. Fragmentation over a lossy protocol (DNS) is a hard problem and I had no time to solve it yet, so the operating system does it. On Linux it is easy to set the Maximum Segment Size (MSS) to a low value, I am not sure about Windows, so basically this is the reason. Iodine work a very different way and because of that it is slow but reliable. It uses EDNS which is not an option in many cases (some servers do not support it), plus I guess it does its own fragmentation. Plus: the DNS module is a PoC in XFLTReaT.