The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

--
*I don't work here. I'm a consultant

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

--
*A picture may be worth a thousand words, but it uses up a thousand times more memory.

Dave Plowman London SW
To e-mail, change noise into sound.

On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

Steve Walker wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

--
Chris Green
·

On 06/02/2021 19:08, Chris Green wrote:
Steve Walker wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

I like to group them - so xxx.xxx.xxx.10 to .39 is available for PCs (5
of them), laptops (2), tablets (3). .40 to .49 for printers (2). .50 to
..69 Satellite boxes (4), music players (2), smart TVs (2), other set-top
boxes (2). .80 to .89 for mobile phones and so on, with .190 to .254 for
home server ESXI host, Nethserver based Domain controller, storage
server, email server, etc. and other virtual machines.

Plus, I want to be absolutely sure that no address changes when the
network and everything attached is restarted, as satellite and set-top
boxes need to access each other and the server, while the music players
need to access the server - and a whole lot more.

We are a bit of a techie household - except for my wife who doesn't know
how any of it works. It has made online, remote learning and working
from home easy though, as there is no competition for machines to work on.

Chris Green has brought this to us :
Unless you re-use addresses that happens anyway with DHCP, I don't
think any system on my LAN has ever changed its IP and nearly all are
assigned by my DHCP server.

Switched off, items can time out from the DHCP server, unless you set
them up not to.

On Sat, 06 Feb 2021 17:17:27 +0000, Steve Walker wrote:

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

So do I. Important since there are three different IP ranges, only onwe
of which is public.

Some Apple devices are a pain, as they do 'anti tracking' and report
random MAC addresses on each reboot.

--
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
Use the BIG mirror service in the UK: http://www.mirrorservice.org
*lightning surge protection* - a w_tom conductor

On 06/02/2021 22:48, Bob Eager wrote:
On Sat, 06 Feb 2021 17:17:27 +0000, Steve Walker wrote:

I do it slightly differently. I have all my network on DHCP, but have
the DHCP server set to give the same IP addresses out to those MAC
addresses each time they connect.

So do I. Important since there are three different IP ranges, only onwe
of which is public.

Some Apple devices are a pain, as they do 'anti tracking' and report
random MAC addresses on each reboot.

I had the opposite problem, addresses being completely non-random. I
relegated one of my satellite boxes to the conservatory, put a new one
in the living room and restored the (OpenVIX) setup from disk - and
found that restoring the old setup to the new box also copied the old
MAC address to the new device, which I certainly did not expect!

On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

+1

Having dabbled with static IPs in the past, I've been relying on DHCP on
Win10. Most of the time it works, but it does occasionally have hissy
fits that I have never really been able to explain. Random power cycling
eventually sorts it, sometimes have to delete and reinstall printers too.

I've got something over 50 devices on my system now (including phones
and laptops belonging to the kids when they visit), I can see subnets
looming.

On 06/02/2021 22:50, newshound wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Â*Â*Â* Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a
fixed IP
address. As a quick fix tried letting it sort itself out. Where of
course
it changed to DCHP - but still not working. Claimed it couldn't find
the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before
that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

+1

Having dabbled with static IPs in the past, I've been relying on DHCP on
Win10. Most of the time it works, but it does occasionally have hissy
fits that I have never really been able to explain. Random power cycling
eventually sorts it, sometimes have to delete and reinstall printers too.

I've got something over 50 devices on my system now (including phones
and laptops belonging to the kids when they visit), I can see subnets
looming.

With a decent router, you can do VLANs too.

On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a fixed IP
address. As a quick fix tried letting it sort itself out. Where of course
it changed to DCHP - but still not working. Claimed it couldn't find the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Ok The two important ones to look at are the gateway address and the DNS
server address.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

I am aware of issues since they turned off SMB 1.0 by default. I had to
turn it back on again to see my NAS servers. After that it seems ok.

https://www.windowscentral.com/how-a...bv1-windows-10

Microsoft removed this by default due to security issues.

On 07/02/2021 21:54, Fredxx wrote:
On 06/02/2021 14:45, Dave Plowman (News) wrote:
In article ,
Â*Â*Â* Fredxx wrote:
On 06/02/2021 12:37, Dave Plowman (News) wrote:
The PC which is part of this pair suddenly lost internet access. It is
cabled to the router. This old machine from the same hub, OK.
It was reaching the router OK, but no internet access. It's on a
fixed IP
address. As a quick fix tried letting it sort itself out. Where of
course
it changed to DCHP - but still not working. Claimed it couldn't find
the
DNS server. Checks on drivers etc showed OK.

Seems Windows did an update a couple of days ago. Restored to before
that
and everything works again.

It's a relatively new (and expensive) Gigabyte MB.

Open a Command Prompt and type "ipconfig /all" on both PCs and compare
the DNS Servers for both on the Ethernet adapter.

If you're using DHCP they should be the same. It is always possible that
the first PC has the DNS Server entry to some historical IP address and
not set through DHCP.

I've got everything on this LAN set to fixed IP. Have a list of what they
all are.

Ok The two important ones to look at are the gateway address and the DNS
server address.

Never had a problem with file sharing under the Win7 Homegroup system.

Total nightmare with Win10 - Google if you don't believe me.

I am aware of issues since they turned off SMB 1.0 by default. I had to
turn it back on again to see my NAS servers. After that it seems ok.

https://www.windowscentral.com/how-a...bv1-windows-10


Microsoft removed this by default due to security issues.

A quick and easy test to see if this is why you can't access a share, is
to ping the server. If you get a response to a ping, but no response on
the share, then lack of SMB1 capability is a common cause.


--
Cheers,

John.

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