North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: how to protect name servers against cache corruption
In article <[email protected]>, you wrote: >_details_. Paul has written papers on DNS security, along with BIND >itself, and I'm inclined to believe him when he says there are no more >trivial fixes. If you know of one, why don't you share it? I'm not Fair enough. Here's a simple piece of input. If BIND 8.1.1 receives a DNS query response with an invalid query ID, it logs it and drops the packet. However, the invalid query ID is evidence of an attack in progress. Why doesn't BIND parse the packet, find out what question is being answered, and immediately re-issue the query with a different ID? In other words, it's possible for BIND to detect that it is under attack (in a response-forged query-ID guessing situation). BIND doesn't do anything about this. Why? Just the simplest suggestion I can come up with (without having this go into multiple pages) to convey the idea that I am trying to be constructive here. I'm not sure this is the appropriate forum for this discussion (*copout*Ididn'tstartthisthread*copout*), but if you want further details as to my harebrained suggestions, I'm happy to give them! -- ---------------- Thomas Ptacek at EnterAct, L.L.C., Chicago, IL [[email protected]] ---------------- exit(main(kfp->kargc, argv, environ));
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