Internet: browsers fails to connect to SOME sites, not all, for no reason.

[NoOp]

On 01/27/2009 11:44 PM, Vincent Trouilliez wrote:

> 
> My e-mail client (Sylpheed) fails to connect to my ISP's POP server,
> (pop.numericable.fr). Sylpheed has a "debugging" window, where I can
> see that it might be a DNS issue:
> 
> ********
> * Connecting to POP3 server: pop.numericable.fr...
> ** LibSylph-WARNING: DNS lookup failed
> ** LibSylph-WARNING: sock_connect_address_list_async: connection to
> pop.numericable.fr:110 failed
> ** LibSylph-WARNING: can't connect to server.
> ** LibSylph-WARNING: [08:32:11] Connection failed.
> ** Connection failed.
> ********
> 
>> Or can you only use web-mail?
> 
> I can't use the web interface for my e-mail account, because as luck
> has it, the web site of my ISP happens to be part of the sites I can't
> connect to !
> 
> I am not so sure if it's really DNS, because I did this experiment :
> 
> I chose a site which I can't connect to with FF/Epiphany :
> www.ubuntu.com. I opened up a terminal window to "ping" it. The ping
> utility displays the IP address resolved from the host name, in this
> case it reports 91.189.94.156
> So, I put that IP in the address bar of FF, and despite not needing DNS
> anymore in this case, well it still says it can't find the site ! 
> Completely weird isn't it ?! :-/
> 
> Well at least I have now got Opera to get me going without resorting to
> using a Windows VM, while we investigate the FF/epiphany/elinks
> problem...
> 
> 
> --
> Vince
> 

You might check to see if your dns servers are listed in
/etc/resolv.conf. They should be 82.216.111.75 and 82.216.111.76.

;; ANSWER SECTION:
numericable.fr.		548	IN	A	82.216.111.15
numericable.fr.		548	IN	NS	ns1.numericable.fr.
numericable.fr.		548	IN	NS	ns2.numericable.fr.

ns1.numericable.fr.	317122	IN	A	82.216.111.75
ns2.numericable.fr.	312318	IN	A	82.216.111.76

So, your 'cat /etc/resolv.conf' should look like this:

$ cat /etc/resolv.conf
nameserver 82.216.111.75
nameserver 82.216.111.76