u3g network problem

[Alexandre L.]

Hi,

If your DNS are changed, I think that your network card is configured in DHCP mode.
To dissallow DNS changes (in /etc/resolv.conf) by DHCP updates, you can add this line to /etc/dhclient.conf : 
prepend domain-name-servers <DNS_IP_adress_1>,<DNS_IP_adresse_2>,<DNS_IP_adresse_3>;
After you must restart your network card and voilà.

Alexandre.

--- En date de : Mer 31.3.10, Alejandro Imass <ait at p2ee.org> a écrit :

> De: Alejandro Imass <ait at p2ee.org>
> Objet: Re: u3g network problem
> À: "Patrick Lamaiziere" <patfbsd at davenulle.org>
> Cc: freebsd-questions at freebsd.org
> Date: Mercredi 31 mars 2010, 12h18
> On Tue, Mar 30, 2010 at 5:27 PM,
> Patrick Lamaiziere
> <patfbsd at davenulle.org>
> wrote:
> > (8-STABLE/i386)
> >
> > Hi,
> >
> > I've got some troubles with a 3G connection. I don't
> know which things
> > I should check to debug this:
> >
> > I use ppp to connect and it works fine. But after a
> while (not a long
> > time), I don't have any reply to DNS requests, as far
> I can see with
> > wireshark...
> >
> 
> What are you using to dial to your 3g network? (I use
> wvdial, and love it)
> 
> I've seen this happen on my 3g network as well. It seems
> that the ISP
> randomly updates the DNS to a broken one. So write down the
> DNSs when
> it's actually working (cat /etc/resolv.conf) and make
> yourself a
> little script that updates them back to the working DNSs
> here is mine
> for example (adjust to your working DNSs):
> 
> 
> # cat ./dnsdigitel
> 
> #!/bin/sh
> echo "nameserver 204.59.152.208" > /etc/resolv.conf
> echo "nameserver 57.73.127.195" >> /etc/resolv.conf
> 
> So when it stops resolving I just ./dnsdigitel and that's
> it. Of
> course, this could be easily automated, etc. but it's a
> quick fix to
> your problem. Now, the interesting this is that your ISP
> does exactly
> the same as my ISP, it changes the DNS randomly to
> non-working ones,
> curious.
> 
> Best,
> Alejandro Imass
> 
> > Then if I use an IP, it works. So it looks like it is
> a problem with
> > DNS. I've tried with an other dns server with the same
> result. I've
> > also tried with a local dns server to cache the
> requests. It looks to
> > help a bit.
> >
> > Anyway I also use a ssh tunnel to connect to my server
> and (on the
> > server) I can see a lot of CLOSED sockets with
> netstat, and a lot of
> > sshd processes stuck, even after days. So there is
> something wrong with
> > the connection.
> >
> > Any idea or suggestion?
> >
> > Thanks, regards.
> >
> >
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