[Bro] Questions about Bro's DNS Parser

Vern Paxson vern at icir.org
Sat Feb 6 21:03:00 PST 2010

> Anyhow, I have attached a sample capture from the trace file, which  
> contains DNS packets with returned errors (some response packets). I  
> also took a look at dns.bro, if I'm not mistaken the parser does not  
> have any error code interpreting feature, it seems all to be group  
> into Weird::WEIRD_FILE.

Do you mean errors based on the analyzer's parsing failing, or errors
indicated via the DNS protocol?  The latter are logged in the DNS log file.
For the former, when I run on the file all I get in the weird file is IP
checksums.  If I use -C to ignore these then I get a bunch of DNS log file
output that seems reasonable, so I'm not immediately seeing the problem.


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