[aklug] Oddity in network connection related to DNS

[Christopher Howard]

Sorry, after some reboots, everything started working fine again, and I
couldn't reproduce the original problem. Owing to time constraints I
had to go ahead and ship that system. So, hopefully it was just a
transient issue!

On Tue, 2017-09-12 at 19:56 -0800, Patrick Clark wrote:
> do NSLOOKUPS work?  Just making sure it's binding the DNS server
> correctly.  Does manually assigning your DNS server(8.8.8.8) work?
> 
> On Tue, Sep 12, 2017 at 7:23 PM, <bryanm at gci.net> wrote:
> > General techniques:
> > check logs
> > turn on verbose reporting
> > inspect network traffic
> > 
> > as a start.
> > 
> > --
> > Bryan Medsker
> > bryan at gnomon.xyz 
> > 
> > 
> > 
> > ----- Original Message -----
> > From:
> > "Christopher Howard" <christopher at alaskasi.com>
> > 
> > To:
> > "AKLUG at aklug.org" <AKLUG at aklug.org>
> > Cc:
> > 
> > Sent:
> > Tue, 12 Sep 2017 11:05:18 -0800
> > Subject:
> > Re: [aklug] Oddity in network connection related to DNS
> > 
> > 
> > 
> > Hmm, I cleared the browser cache and now have no browse either...
> > This
> > smells of some kind of firewall problem not allowing the dns to get
> > through.
> > 
> > On Tue, 2017-09-12 at 11:01 -0800, Christopher Howard wrote:
> > > Hi list, I'm testing an Sat Int system before sending to field,
> > and
> > > I'm
> > > running into something strange. My main test systems are a Debian
> > > Jessie notebook, and then a Debian Squeeze laptop I pull out to
> > > confirm
> > > a problem is not just related to one system only. So, for the
> > most
> > > part
> > > everything looks fine with this connection:
> > > 
> > > The Good
> > > - Getting the right IP address from DHCP server on modem
> > > - Getting the right default gw from DHCP on modem
> > > - getting correct DNS server from DHCP on modem (checked
> > > /etc/resolv.conf)
> > > - I have no trouble browsing any site on the Internet through
> > Firefox
> > > (I don't use a proxy)
> > > - I can ping any IP address I want from the command line
> > > - Firewall is wide-open (for testing purposes)
> > > 
> > > The Bad:
> > > - If I try to do anything else on the command line involving a
> > DNS
> > > name
> > > (google.com, etc.) the command fails, acting like it cannot query
> > > DNS.
> > > So, for example, I cannot "wget google.com" (unable to resovle
> > host
> > > address...) and I cannot ping google.com, and I can not even "dig
> > > @8.8.8.8 google.com" (same for other Web sites).
> > > 
> > > I don't have this problem on any of our other connections, so I'm
> > > nervous something is wrong with the configuration of my modem.
> > Does
> > > anybody have any suggestions as to what might be going on, or how
> > to
> > > narrow it down?
> > > 
> > -- 
> > Christopher Howard
> > Computer Assistant
> > Alaska Satellite Internet
> > 3239 La Ree Way
> > Fairbanks, Alaska 99709
> > 1-888-396-5623
> > https://alaskasatelliteinternet.com
> > personal web site: https://qlfiles.net
> > https://emailselfdefense.fsf.org/en/
> > 
> > 
> > 
> > 
> > _______________________________________________
> > aklug mailing list
> > aklug at aklug.org
> > https://lists.aklug.org/mailman/listinfo/aklug
> > 
> 
> 
> 
> _______________________________________________
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> aklug at aklug.org
> https://lists.aklug.org/mailman/listinfo/aklug
-- 
Christopher Howard
Computer Assistant
Alaska Satellite Internet
3239 La Ree Way
Fairbanks, Alaska 99709
1-888-396-5623
https://alaskasatelliteinternet.com
personal web site: https://qlfiles.net
https://emailselfdefense.fsf.org/en/


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