smb_corp_user  Master Member

OK, I see. This is more than I have looked into, since I have not worked with SSO-solutions combining Microsoft with hardware OEM solutions. I defer to the Zyxel Team members and other Pro users who may have used solutions like that to get suggestions of how SSO is handled by Zyxel.

From my own experience, this is the difference between Windows Home edition and Windows Professional computers being members of the AD domain. Domain members have access to domain shared resources like printers, SQL server database, file shares, and other domain computers. Windows Home computers do not have this access…

Are you sure that TCP port 25 is allowed for Office 365 in your case? The normal port to use is 587 (STARTTLS) for modern and current subscriptions, unless you are using Exchange. TCP Port 25 is insecure and exposed, just like HTTP without SSL.

Very good points. I should have known that the power adapter could have an issue separately from the Zyxel device itself. Quite possible scenario based on the event of the area power failure. Then again, there is also the potential for device hardware failure issue, just like you said.

@Zyxel_Jeff : Thank you for the firmware link and the suggestions. It looks like @studio has great difficulty in trying to end the continuous stream of console warning messages (FLASH: AMD 16M). If there is a known method to stop the console messaging, I think that would be the most helpful step for @studio to be able to…

Sorry for not knowing the solution to your problem. Also, since your product has reached its End-of-Life status several years ago, it is difficult to know if anyone else knows a solution to this issue. Unless we can have any advisory comments from a Zyxel Team member or another Pro user, I fear we might be dealing with a…

I just noticed more details in your first post, particularly the one about power failure. There is a slight chance your device has crashed completely. Difficult to say for sure before you have tested reset procedures and pressing buttons. Check the USG100 manual for troubleshooting error messages.

Unless there is any way to send some kind of <BREAK> command to the terminal (to see if it is possible to get a prompt of some kind), it appears you might have a situation where the device is rendered unusable. Have you tried pressing any buttons (check the manual if there are any recommended reset methods) to see if the…

Please follow the link above, I think it should still be valid. Otherwise, a Zyxel Team member needs to offer a solution.

You most likely need to create an extra WAN-to-LAN Firewall Policy Rule to allow incoming traffic from the external https server. Not sure if reverse rule is needed, since it should be safe to assume that LAN clients do not have restrictions on internet access (please verify, just in case). The WAN-to-LAN policy rule can…

You might have to reload the firmware via Xmodem, or perform a firmware recovery. Check the previous community post threads about this type of issue:

Fair enough, then it seems your problem is with some kind of Firewall or Firewall Policy Rule setup on your Zyxel units. Not sure how that works on switches, have you tried looking in the manuals to see if there are any named security settings like Firewall or Policy? (edit: I do not have any experience with other Zyxel…

Have you checked with your provider that they allow computer-to-computer network traffic on the same local network (LAN), or is that restricted as well? My experience with USG model routers is that you can add or verify that there is a Policy Rule named LAN (or LAN1 or LAN-to-LAN) where all traffic is allowed, no…

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