Re: 建议合作确定sourceforge.net及slashdot不能访问的地域

[yuwen <yuwen@micetek.com.cn>]

Zhang Weiwu wrote:

> yuwen wrote:
>
> > But there're many root servers, for example f.root-servers.net can be
> > reached, why slashdot.org can be resovled?  Try these two commands:
> >
> > leo:~# dig www.slashdot.org
> >
> > ; <<>> DiG 9.2.1 <<>> www.slashdot.org
> > ;; global options:  printcmd
> > ;; connection timed out; no servers could be reached
> > leo:~#
> > leo:~#
> > leo:~#
> > leo:~#
> > leo:~#
> > leo:~# dig wwwwww.slashdot.org
> >
> > ; <<>> DiG 9.2.1 <<>> wwwwww.slashdot.org
> > ;; global options:  printcmd
> > ;; Got answer:
> > ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 32251
> > ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
> >
> > ;; QUESTION SECTION:
> > ;www.slashdot.org.              IN      A
> >
> > ;; Query time: 4063 msec
> > ;; SERVER: 202.96.209.133#53(202.96.209.6)
> > ;; WHEN: Wed Mar 31 09:40:08 2004
> > ;; MSG SIZE  rcvd: 34 
>
>
> I don't really get it ;`) What do you mean? 
I just mean something really weird and evil happened.  202.96.209.133 
is dns of my ISP.  When I dig www.slashdot.org, why the error message 
is "no servers could be reached"? When I dig an non-existed site 
wwwwww.slashdot.org, why  the server show up again?

Do you mean I should set my
> /etc/resolv.conf to use a root server like 192.5.5.241 
> (f.root-servers.net.)?
No.


> zhangweiwu@thinkpad:~>dig @202.96.209.133 www.slashdot.org
>
> ; <<>> DiG 8.3 <<>> @202.96.209.133 www.slashdot.org
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; res_nsend: Operation timed out
> Exit 9
> zhangweiwu@thinkpad:~>dig @202.96.209.133 wwwwww.slashdot.org
>
> ; <<>> DiG 8.3 <<>> @202.96.209.133 wwwwww.slashdot.org
> ; (1 server found)
> ;; res options: init recurs defnam dnsrch
> ;; res_nsend: Operation timed out
> Exit 9