Windows 10: Switch to DHCP - a security problem in Win10 updates

In couple of last Win10 automatic upgrades I observed the following update behaviour - if the configured IP address of the Ipv4 protocol on a network card is unable to reach Internet, the update switches the settings to DHCP mode in order to correct this. This IMO is security risk in a lot of situations and should not be done. Example: I have a PC with two network cards, one card sits in my office LAN subnet and is also used to access the internet. The second card sits in a neigbooring office different LAN (different subnet) and is used to access their network drives. No Internet access is allowed on it - the other router blocks the particular IP address. In order to avoid errors in case routing would accidentally decide to use this other subnet, I have the metric of the network card interface set to 999. All works well. Now there comes Win10 Update that detects that the other card cannot access the Internet and changes the "explicit IP" setting to DHCP mode. *Sleepy Internet is now accessible through it and I have no control which router manages the request - mine, or theirs? Moreover - because the other office uses different provider, there may arise a conflict when sending mails - mails routed through the other subnet will be blocked as they come from provider not known to my SMTP server operator.

:)

 

Can't find wi-fi security options in windows 10.

I need to connect wi-fi network with wrong certificate. Earlier I can find network in "known networks list" and change security options. Now, in win10 I see only DHCP options.

 

BSOD DRIVER_IRQL_NOT_LESS_OR_EQUAL USBXCHI.SYS

ZigZag3143,

I disabled

/**************************************************************************

Name [00000011] Hyper-V Virtual Switch Extension Adapter

Adapter Type Ethernet 802.3

Product Type Hyper-V Virtual Switch Extension Adapter

Installed Yes

PNP Device ID ROOT\VMS_VSMP\0000

Last Reset 6/1/2016 6:07 AM

Index 11

Service Name VMSMP

IP Address Not Available

IP Subnet Not Available

Default IP Gateway Not Available

DHCP Enabled No

DHCP Server Not Available

DHCP Lease Expires Not Available

DHCP Lease Obtained Not Available

MAC Address Not Available

Driver c:\windows\system32\drivers\vmswitch.sys (10.0.10586.122, 953.50 KB (976,384 bytes), 3/2/2016 9:19 AM)

************************************************/

And I have not seen the problem repeat.

I have been getting updates regularly.

Periodically I notice after an update this is re enabled.

 

I would give that LAN a static IP using the router most routers are capable of this, That way if and when it switches to DHCP it should get the right IP.

I remember one or 2 of the updates last year left LAN card in static mode but all boxes were blank.