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Fri, 15 Mar 2024 04:13:12 +0000 Date: Fri, 15 Mar 2024 04:13:10 +0000 (UTC) From: Sreenath Battalahalli To: Chris Cc: freebsd-net@freebsd.org Message-ID: <1813027035.5041661.1710475990554@mail.yahoo.com> In-Reply-To: References: <962395829.4561667.1710400340452.ref@mail.yahoo.com> <962395829.4561667.1710400340452@mail.yahoo.com> Subject: Re: Sporadic DNS failure List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_5041660_1565120402.1710475990553" X-Mailer: WebService/1.1.22129 YMailNodin X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:36646, ipnet:66.163.184.0/21, country:US] X-Rspamd-Queue-Id: 4TwrT72hCHz4Lx7 ------=_Part_5041660_1565120402.1710475990553 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable =20 Hi Chris, Thanks for your message. The wifi continues to be associated with access point, and I can ping 1.1.1= .1 as well. My USB wifi interface is rtwn(earlier urtwn) It is just that DNS queries fail, even when 1.1.1.1 is accessible, at least= to ping. Is it possible that UDP communication is failing?=20 Is there any log information that can shed more light on the issue? thanks, Sreenath On Friday, March 15, 2024 at 12:48:47 AM GMT+5:30, Chris wrote: =20 =20 On 2024-03-14 00:12, Sreenath Battalahalli wrote: > Hi, >=20 > I have been using freebsd as my primary OS on my ACER laptop for many yea= rs=20 > now. > My laptop has 802.11AC card for which there is no kernel driver available= . I=20 > am I > use a USB wifi adapter to access the wifi router. >=20 > I am having sporadic DNS failures . >=20 > After reboot, everything works fine but after some time (30 minutes to a= =20 > couple of > hours), Internet > connections start to fail. >=20 > When this happens, I am able to ping 1.1.1.1, my DNS server. >=20 > However, > # drill yahoo.com (or any other name) fails with following error: >=20 > Error: error sending query: Could not send or receive, because of network= =20 > error >=20 > Other devices connected to same Wifi router continue to work fine. >=20 > I ran drill under truss and it appears after sendto to 1.1.1.1, no respon= se=20 > comes. >=20 > After this error occurs, it stays like that for many some time (20-30=20 > minutes) and > sometimes it gets resolved by itself. >=20 >=20 > #uname -a > FreeBSD bsd12 13.0-RELEASE-p13 FreeBSD 13.0-RELEASE-p13 #0: Mon Aug 29=20 > 19:52:47 > UTC 2022=C2=A0 =C2=A0 root@amd64-builder.d > aemonology.net:/usr/obj/usr/src/amd64.amd64/sys > /GENERIC=C2=A0 amd64 >=20 > Can someone please help me debug this problem? I'm going to suggest that this might be a symptom of your usb port/hub=20 hanging-up/ disconnecting due to inactivity. Your BIOS setup may have a setting=20 associated with that. OTOH I don't know what NIC driver you're using for your USB=20 network adapter. When you discover you can't perform DNS lookups, are you still=20 associated? eg; does the output of ifconfig still show associated? What are the setting= s in rc.conf(5) related to your network setup? >=20 > Thanks, > Sreenath HTH --Chris =20 ------=_Part_5041660_1565120402.1710475990553 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Hi Chris,

Thanks for your message.
The w= ifi continues to be associated with access point, and I can ping 1.1.1.1 as= well.
My USB wifi interface is rtwn(earlier urtwn)

It is just th= at DNS queries fail, even when 1.1.1.1 is accessible, at least to ping.
=
Is it possible that UDP communication is failing?
Is there any log = information that can shed more light on the issue?

thanks,
Sreena= th

=
On Friday, March 15, 2024 at 12:48:47 A= M GMT+5:30, Chris <bsd-lists@bsdforge.com> wrote:


=
On 2024-03-14 00:12, Sreenath Battalahalli wrote= :
> Hi,
>
>= I have been using freebsd as my primary OS on my ACER laptop for many year= s
> now.
> My laptop has 802.11A= C card for which there is no kernel driver available. I
= > am I
> use a USB wifi adapter to access the wifi = router.
>
> I am having sporadic= DNS failures .
>
> After reboot= , everything works fine but after some time (30 minutes to a
> couple of
> hours), Internet
> connections start to fail.
>
> When this happens, I am able to ping 1.1.1.1, my DNS server.
>
> However,
> # d= rill yahoo.com (or any other name) fails with following error:
>
> Error: error sending query: Could not se= nd or receive, because of network
> error
>
> Other devices connected to same Wifi ro= uter continue to work fine.
>
> = I ran drill under truss and it appears after sendto to 1.1.1.1, no response=
> comes.
>
&= gt; After this error occurs, it stays like that for many some time (20-30 <= br clear=3D"none">> minutes) and
> sometimes it get= s resolved by itself.
>
>
> #uname -a
> FreeBSD bsd12 13.0-RELEA= SE-p13 FreeBSD 13.0-RELEASE-p13 #0: Mon Aug 29
> 19:5= 2:47
> UTC 2022    root= @amd64-builder.d
> aemonology.net:/usr/obj/usr/src= /amd64.amd64/sys
> /GENERIC  amd64
>
> Can someone please help me debug this prob= lem?
I'm going to suggest that this might be a symptom of= your usb port/hub
hanging-up/
disconn= ecting due to inactivity. Your BIOS setup may have a setting
associated
with that. OTOH I don't know what NIC dri= ver you're using for your USB
network
= adapter. When you discover you can't perform DNS lookups, are you still associated?
eg; does the output of ifconf= ig still show associated? What are the settings
in rc.con= f(5) related to your network setup?

>
> Thanks,
> Sreenath


HTH

--Chris

=
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