br.freebsd.org - DNS issue

[Giovanni Tirloni]

Hi,

 It seems both DNS servers are not working as expected and this is
 causing problems to connect to the mirrors in Brazil.

> server ns1.isc-sns.net         
> set q=ns
> br.freebsd.org
Server:         ns1.isc-sns.net
Address:        72.52.71.1#53
Non-authoritative answer:
*** Can't find br.freebsd.org: No answer

Authoritative answers can be found from:
br.freebsd.org  nameserver = ns.br.freebsd.org.
br.freebsd.org  nameserver = styx.iqm.unicamp.br.
ns.br.freebsd.org       internet address = 143.106.13.62

> server styx.iqm.unicamp.br.
Default server: styx.iqm.unicamp.br.
Address: 143.106.51.37#53
> set q=a
> ftp.br.freebsd.org
Server:         styx.iqm.unicamp.br.
Address:        143.106.51.37#53
** server can't find ftp.br.freebsd.org: REFUSED

> server 143.106.13.62
> set q=a
> ftp.br.freebsd.org
;; connection timed out; trying next origin

 Anyone here with access to fix/investigate this?

Thanks,
Giovanni