On 01/09/13 08:39, Daniele wrote:
2013/1/9 Phil Mayers <p.may...@imperial.ac.uk
<mailto:p.may...@imperial.ac.uk>>
On 09/01/13 13:53, Daniele wrote:
This is the scenario.
I installed BIND9 via `apt-get` on a newly installed UBUNTU 12.04,
virtualized on VirtualBox.
The network works properly because if I indicate a different
server from
my own BIND9 (the first line of '/etc/resolv.conf' is, for
example,
`nameserver 8.8.8.8`) the lookups and any action on the
Internet succeed.
No, this assumption is not valid.
I meant that I can reach the Internet and, vice versa, the Internet
can reach my terminal.
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Recursive queries that named does for a client are different than your
machine as a dns client reaching out to Google's recursive service.
You need to have UDP & TCP port 53 open to your recursive server(the one
running named) first of all. And if any network element within your
network limits the size of UDP packets, you will have problems with
EDNS0 queries.
On this box running named, try this:
dig +trace www.msn.com
dig +trace imperial.ac.uk
After dig gets a copy of the root servers from the local named, it will
do the same type of queries that a recursive name server does.
Lyle Giese
LCR Computer Services, Inc.
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