Linux Forums unreachable.

[Ray Parrish]

Karl Auer wrote:
> On Mon, 2010-02-22 at 00:56 -0800, Ray Parrish wrote:
>   
>> I do not think it is a DNS problem, as I used the following Python code 
>> to retrieve the ip address of lunuxforums.org as 174.132.123.98, and 
>> attempted to connect to that ip address with my web browser [Firefox], 
>> and was unable to connect.
>>     
>
> The browser found the desired site, but could not connect. That suggests
> strongly that it is not a DNS problem.
>
> You can completely exclude a DNS problem (or show that it IS a DNS
> problem) with three simple steps.
>
> 1: Attempt to resolve the problem name using dig.
>
>       dig www.linuxforums.org
>
>    If you get back an answer, then the DNS is working for you, and
>    the problem is almost certainly NOT a DNS problem.
>
>    If dig does NOT return an answer, then you almost certainly DO have
>    a DNS problem.
>
> 2: If dig did NOT return an answer, try tracing the DNS lookup:
>
>       dig +trace www.linuxforums.org
>
>    If you get an answer with this, but did not in step 1, then someone
>    is caching bad data. There is little you can do about it unless you
>    run your own caching nameserver in which case try clearing its cache.
>    Otherwise you can wait - but it could be quite a long time; hours or
>    even days.
>
> 3. Now add an entry for the name into /etc/hosts:
>
>       174.132.123.98   www.linuxforums.org
>
>    You will need to be root to do this.
>
>    Does your browser now find the desired site? If yes, it is
>    *definitely* a DNS problem. Remember to remove the new entry
>    from /etc/hosts before further testing!
>
> How to fix a DNS problem is a bigger question :-)
>
> Regards, K.
>   
ray at RaysComputer:~$ dig www.linuxforums.org

; <<>> DiG 9.4.2-P2.1 <<>> www.linuxforums.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37961
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.linuxforums.org.        IN    A

;; ANSWER SECTION:
www.linuxforums.org.    300    IN    CNAME    linuxforums.org.
linuxforums.org.    300    IN    A    174.132.123.98

;; Query time: 219 msec
;; SERVER: 192.168.0.1#53(192.168.0.1)
;; WHEN: Mon Feb 22 05:12:02 2010
;; MSG SIZE  rcvd: 67

ray at RaysComputer:~$ dig +trace www.linuxforums.org

; <<>> DiG 9.4.2-P2.1 <<>> +trace www.linuxforums.org
;; global options:  printcmd
;; Received 17 bytes from 208.67.220.220#53(208.67.220.220) in 60 ms

And adding the ip address to the hosts file made no difference.

Thanks, Ray Parrish


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