Re: [Dorset] Strange Network Behaviour

[Terry Coles]

On Tuesday, 26 June 2018 17:52:49 BST Ralph Corderoy wrote:
> The PoS doesn't broadcast a DNS request, but sends it to its configured
> DNS servers, none of which should be router-pi's Internet-side interface
> and so it won't even see packet.  If PoS had the router-pi's
> captive-side IP address as a DNS server for some reason then it wouldn't
> know how to get it to there without a route via Internet-side interface.

OK Thanks.

> It's not a server that's pinged, but an interface.  Often, they're the
> same, but you have two of interest, plus loopback.  You need to try
> pinging both from both sides, so four pings.

Well I think I've done that.  I've pinged from the Home network side to eth1 
(from a PC connected to the Home Router), which works, to eth0 (which is 
connected to the AP), which doesn't and from the AP side (my phone) to eth0 
which works, and to eth1, which doesn't.

I can ping 8.8.8.8 from the AP side too.

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Re: [Dorset] LUG Meets World Cup.

[Tim Waugh]

On Tue, 26 Jun 2018 at 17:25, Terry Coles  wrote:

> 2. Postpone this months meeting until after the Football is finished (the
> Final is on the 15th).
>

I vote for 2, especially because I can't make the original date.

For this option, are we saying it would be Tuesday 17th July or is that not
decided?

Tim.
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Re: [Dorset] Strange Network Behaviour

[Ralph Corderoy]

Hi Terry,

> my concern wsa that if I got my routing tables wrong then my server
> could respond to a DNS Request from the PoS equipment instead of the
> ISP defined Routers.

The PoS doesn't broadcast a DNS request, but sends it to its configured
DNS servers, none of which should be router-pi's Internet-side interface
and so it won't even see packet.  If PoS had the router-pi's
captive-side IP address as a DNS server for some reason then it wouldn't
know how to get it to there without a route via Internet-side interface.

> Presumably, if I've got the setup right, I shouldn't be able to ping the 
> server from the Internet side of eth1 (eg my PC), only the AP side (eg my 
> phone)?

It's not a server that's pinged, but an interface.  Often, they're the
same, but you have two of interest, plus loopback.  You need to try
pinging both from both sides, so four pings.

Cheers, Ralph.

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Re: [Dorset] LUG Meets World Cup.

[Ralph Corderoy]

> 2. Postpone this months meeting until after the Football is finished
> (the Final is on the 15th).

2.

Cheers, Ralph.

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Re: [Dorset] LUG Meets World Cup.

[Natalie Masse Hooper]

I vote 2.

On Tue, 26 Jun 2018, 17:25 Terry Coles,  wrote:

> On Monday, 25 June 2018 14:02:29 BST Ralph Corderoy wrote:
> > I'd be happy to ditch the beer on tap, especially if there was the
> > option of `BYO'.  Meeting rooms in libraries are no good as they close
> > too early.  A pub with a `function room'?  The community hall option,
> > but we'd need a key to lock up as we leave.
> >
> > It would be nice to be able to open up the format a bit beyond very
> > localised chat with immediate neighbours.
>
> So.  In the short term; what are we going to do?  There haven't been many
> suggestions for alternative venues yet and the Broadway will undoubtedly
> be
> packed and noisy.
>
> I suggest that we take a poll on two alternatives (short term solution):
>
> 1.  Cancel this months meeting.
>
> 2. Postpone this months meeting until after the Football is finished (the
> Final is on the 15th).
>
> If we chose Number 2., there aren't any other upcoming events that might
> impact the pub availability after the 15th. (There are some, but the Tour
> de
> France and the Golf Open shouldn't fill the place :-)
>
> Place your bets please!
>
> --
>
>
>
> Terry Coles
>
>
>
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Re: [Dorset] LUG Meets World Cup.

[Hamish MB]

I vote #2 - I think it's likely that any other place will be completely 
packed too.

Hamish

On 26/06/18 17:24, Terry Coles wrote:
> On Monday, 25 June 2018 14:02:29 BST Ralph Corderoy wrote:
>> I'd be happy to ditch the beer on tap, especially if there was the
>> option of `BYO'.  Meeting rooms in libraries are no good as they close
>> too early.  A pub with a `function room'?  The community hall option,
>> but we'd need a key to lock up as we leave.
>>
>> It would be nice to be able to open up the format a bit beyond very
>> localised chat with immediate neighbours.
> So.  In the short term; what are we going to do?  There haven't been many
> suggestions for alternative venues yet and the Broadway will undoubtedly be
> packed and noisy.
>
> I suggest that we take a poll on two alternatives (short term solution):
>
> 1.  Cancel this months meeting.
>
> 2. Postpone this months meeting until after the Football is finished (the
> Final is on the 15th).
>
> If we chose Number 2., there aren't any other upcoming events that might
> impact the pub availability after the 15th. (There are some, but the Tour de
> France and the Golf Open shouldn't fill the place :-)
>
> Place your bets please!
>

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Re: [Dorset] LUG Meets World Cup.

[Terry Coles]

On Monday, 25 June 2018 14:02:29 BST Ralph Corderoy wrote:
> I'd be happy to ditch the beer on tap, especially if there was the
> option of `BYO'.  Meeting rooms in libraries are no good as they close
> too early.  A pub with a `function room'?  The community hall option,
> but we'd need a key to lock up as we leave.
> 
> It would be nice to be able to open up the format a bit beyond very
> localised chat with immediate neighbours.

So.  In the short term; what are we going to do?  There haven't been many 
suggestions for alternative venues yet and the Broadway will undoubtedly be 
packed and noisy.

I suggest that we take a poll on two alternatives (short term solution):

1.  Cancel this months meeting.

2. Postpone this months meeting until after the Football is finished (the 
Final is on the 15th).

If we chose Number 2., there aren't any other upcoming events that might 
impact the pub availability after the 15th. (There are some, but the Tour de 
France and the Golf Open shouldn't fill the place :-)

Place your bets please!

-- 



Terry Coles



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Re: [Dorset] I have lost sound

[Tim]

On 23/06/18 10:57, Ralph Corderoy wrote:

Hi Tim,


I have been able to get sound out of VLC media player by selecting
Audio from the menu bar and then selecting Audio Device and then from
the list select

 HDA INTEL PCH ALC887-VD Analog Default Audio Device

I can then play audio or video track and I can hear the sound

Look through `pactl list' output to see if anything seems odd or
missing?  Compare it to same command's output on another live-USB boot
where browser-sound works?

Cheers, Ralph.


Taken from the Debian Forum

After all that it was a *bug in TiMidity of all things. The new version 
takes control of the sound chip before PulseAudio can, effectively 
locking it out. So I used "systemctl stop timidity" followed by 
"pulseaudio -k" and wouldn't you know it? Fully restored sound. I'd 
advise everyone else to try the same to see if you're being affected by 
this too.


*https://bugs.debian.org/cgi-bin/bugrepo ... bug=901148 



I simply deleted Timidity and my sound started working


Tim


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Re: [Dorset] Strange Network Behaviour

[Terry Coles]

On Tuesday, 26 June 2018 15:01:17 BST Ralph Corderoy wrote:
> DNS for raspberrypi.org has been intermittently failing to resolve since
> my last email.  I wouldn't bother investigating your work whilst it's
> still flaky.

Yes.  I've also found quite a few postings about it on the web.  I agree with 
what you say about trying to work on my Webserver / Router, but I have my 
Mother down next week and i was hoping to deploy this week.

> DNS servers don't dish up routes, and you're right, your DNS server will
> elect to only listen on the interface where there's incoming requests
> from the paying public.

I understand that DNS Servers have nothing to do with routes in themselves, 
but my concern wsa that if I got my routing tables wrong then my server could 
respond to a DNS Request from the PoS equipment instead of the ISP defined 
Routers.

Presumably, if I've got the setup right, I shouldn't be able to ping the 
server from the Internet side of eth1 (eg my PC), only the AP side (eg my 
phone)?

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Re: [Dorset] Strange Network Behaviour

[Ralph Corderoy]

Hi Terry,

> I can't connect to it again, even though the Pi hasn't been connected
> since yesterday.  I was connecting OK earlier today.  So it's maybe
> nothing to do with the Pi.

DNS for raspberrypi.org has been intermittently failing to resolve since
my last email.  I wouldn't bother investigating your work whilst it's
still flaky.

> I have NAT on eth1, so presumably a machine on the Internet side of
> the Pi Router would not inadvertently pick up the route from my DNS
> server when I have set it up.

DNS servers don't dish up routes, and you're right, your DNS server will
elect to only listen on the interface where there's incoming requests
from the paying public.

Cheers, Ralph.

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Re: [Dorset] Strange Network Behaviour

[Terry Coles]

On Tuesday, 26 June 2018 13:44:23 BST Ralph Corderoy wrote:
> About fifteen minutes ago I couldn't open that URL from home, and dig(1)
> couldn't resolve the domain name to an address to use.  dig also failed
> on a server in the USA.  Now it's OK and I've changed nothing.  Suggests
> it's not you and they're having intermittent problems, e.g. with their
> DNS entries.

I can't connect to it again, even though the Pi hasn't been connected since 
yesterday.  I was connecting OK earlier today.  So it's maybe nothing to do 
with the Pi.

> And did Chrome still fail soon after that?

Yes. and for the rest of the afternoon until I gave up and shut down.

> That would be a different DNS server, route, etc.

So the DNS Server used by Android perhaps kept its integrity for longer?

I'll have another look at the system and see if the routes that I've set up 
could cause any problems.  I have NAT on eth1, so presumably a machine on the 
Internet side of the Pi Router would not inadvertently pick up the route from 
my DNS server when I have set it up.  In short, my DNS server should only be 
available to the phones, tablets, etc that connect through our WiFi AP.  Do 
you agree.

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Re: [Dorset] Strange Network Behaviour

[Ralph Corderoy]

Hi Terry,

> https://www.raspberrypi.org/forums/viewtopic.php?f=36=215608=1332047#p1332067
> Chromium gave an error saying that the site was either down or had too
> much traffic.  I then went to my normal desktop PC and got the same
> result.

About fifteen minutes ago I couldn't open that URL from home, and dig(1)
couldn't resolve the domain name to an address to use.  dig also failed
on a server in the USA.  Now it's OK and I've changed nothing.  Suggests
it's not you and they're having intermittent problems, e.g. with their
DNS entries.

> I could get to raspberrypi.org using my phone to connect to the Home
> Router via WiFi

And did Chrome still fail soon after that?

> and also via the 4G connection.

That would be a different DNS server, route, etc.

Cheers, Ralph.

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Re: [Dorset] LUG Meets World Cup.

[Paul Tansom]

** Ralph Corderoy  [2018-06-25 06:36]:
> Hi Terry,
> 
> I noticed the first Tuesday in July, the 3rd, is the day of the 19:00
> World-Cup match between 1H and 2G.  Group G includes England so if they
> finish second in the group then that would make the pub even more packed
> and rowdy.
> 
> Postponing a week isn't great either though.  19:00 Tuesday 10th is a
> semi-final so could be busy no matter's who's playing.
> 
> It would be nice to have a better venue, i.e. no TVs!
> 
> Cheers, Ralph.
** end quote [Ralph Corderoy]

Interesting that the primary reason is the pub being busy and not people
not attending because they want to watch the match ;-) Having little
interest in football that makes sense to me though. Noting other
comments, it doesn't have to be a permanent change... I'll go back to
lurking now...

Oh, apart form putting an open invite to the Portsmouth LUG meets if you
are in the area on the third Saturday of the month. We are luck enough
to have a meeting room next to a bar, opposite a train station, so we
have space for talks (when I can find speakers) and old fashioned
bring-a-box meets (mainly laptops, Raspberry Pis, etc.)... and
sandwiches. I post notifications to Surrey, Sussex and Hampshire as we
have regulars from those areas, but I've left Dorset as being too far.

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