Bind 9.0.0 and FormErr

[Mark.Andrews at nominum.com]

	They are just EDNS probes.

	Mark

> To start playing with bind 9.0.0 I set up a caching only server on a
> RedHat 7.0 machine. When running tcpdump to get something to resolve
> I observe a lot of DNS traffic with FormErr error code, as reported
> by tcpdump.  According to the html manual pages, section 4.4.6 this is
> the result if signed queries are sent to non-TSIG servers.  However the
> setup I am using is completely minimal and no keys are defined at all.
> 
> In practice the cahing server seems to work well, but the error codes
> worry me. Any ideas?
> 
> A sample query as reported by tcpdump:
> 
> toy.P52.hio.no.1409 > b.root-servers.net.domain: 61170 [b2&3=0x30] [1au] PTR?
>  107.0.9.128.in-addr.arpa. (53)
> b.root-servers.net.domain > toy.P52.hio.no.1409: 61170 FormErr- [0q] 0/0/0 (1
> 2) (DF)
> 
> -psi
> 
> 
--
Mark Andrews, Nominum Inc.
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at nominum.com