[vox-tech] Fwd: Very slow off net

[Richard Harke]

Sorry. I was trying to keep it short.
Linux, of course. Debian etch for amd-64

/etchosts has a 127.0.0.1 localhost grassmann
line plus a line 192.168.0.21 grassmann.harke.org grassmann
and similar for my other machines on this lan
every thing on this lan has fixed IP address

One mystery solved. /etc/resolv.conf has the IP addresses for openDNS
But I don't know how they got there. The file is dated 10/20 so it might be
from when I used the wifi at Borders. I had to change my interfaces file
and do a ifup ath0=borders to get connected. Could that have given
permission to rewrite /etc/resolv.conf?
I guess I could check this out the next time I'm at Borders.

I used wireshark to trace the net happenings. I just retried with the net
connected
to see if there was any follow up to the DNS query.  For firfox, er
iceweasel,
there was but for a card game no follow up.

On Tue, Oct 27, 2009 at 1:46 AM, Bill Broadley <bill at broadley.org> wrote:

> Bill Kendrick wrote:
> >    When I use my laptop without a network connection, it becomes very,
> very
> >    slow launching applications. I've done some tracing and apparently it
> >    sends
>
> Very strange.  Operating system?  Distribution?  Anything unusual?  What
> does
> hostname report?  What is in /etc/hosts?
>
> My best guess (with very little info) is that you are trying to find
> localhost
> and failing.
>
> >    some kind of request to a DNS server. Not just any DNS but openDNS in
>
> Apparently?  Strace?  Wireshark?  How you tracked it down would be helpful.
>
> >    particular. When its off net, it waits for the time-out before
> continuing.
>
> Ugly.  Try adding your hostname to the /etc/hosts entry for 127.0.0.1
>
> >    So two quesions Why contact DNS for any app launch? (This includes
> >    apps that have no possibility of using the net)
>
> Anything that displays X (or runs inside of a new xterminal) needs to find
> the
> $DISPLAY, which might well do a hostname lookup to set/check the display.
>
> >    2nd. Why openDNS? I had never heard of them before and certainly
> >    haven't signed up for their service.
>
> I'm a fan, certainly much faster on average than what pacbell provides.
>  Where
> does your laptop/router get it's IP?  Static?  DHCP from your network
> provider?  If it's dhcp then you are getting the DNS servers from your dhcp
> provider, if not then someone likely followed the opendns directions for
> your
> router/laptop.
>
> I wouldn't be terribly surprised if say a linksys router installed with a
> community linux distribution like openwrt defaulted to using opendns as a
> server.
>
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