I recently purchased and installed a new modem, an Arris SB6183-RB. I went through the install with my provider and got everything enabled and set to go while I was on a direct ethernet connection. The ethernet connection still works fine.
My issue is once I send traffic over my wireless router, an ASUS RT-AC68U that I have had for two years and always worked great. Something is causing major security conflicts. Perhaps the firewall somehow? Basically, any device over the wireless network receives certificate security errors and websites cannot load. I have attached outlook.com screenshots as an example. I have two computers, and a smart phone, and any websites over the network now have problems. There are a few sites where certificates seem to work, and some apps on my phone seem to work fine. But the majority of websites:
1.) I get an alert from ESET antivirus about the faulty certificate.
2.) If I ignore that, Firefox is usually next on my tail.
3.) If I add an exception on Firefox and ignore, then it goes through OpenDNS and I am blocked on that end.
Basically, any traffic over my router is now hit with tons of warnings. I have tried the following:
1.) Updated the Firmware on the router, took a few flashes to get up to the most current Merlin version 380.62, did not help.
2.) I tried modifying a few settings in the router firmware that were recommended after updating to the latest Merlin, but these are more speed adjustments. Did not help.
3.) I went into the GUI for the Arris modem, which is pretty basic and limited. There are some errors and that on the System Log, but I don't know enough to decipher them. I did notice that the system time for the modem is 1 hour behind my actual time (Central US), and I know that certificate errors can happen because of time issues. The example outlook.com cert is a 5 day cert, and falls within the correct time.
4.) Verified that my system time is correct through the BIOS.
I did tons and tons of googling, but no one has had my specific issue. I am at a loss. Perhaps it's something as simple as a firewall setting on the Router, I do not know. But my internet network is currently unusable. I have to be tethered via ethernet just to make this post, as this site is of course blocked over the wireless network.
Any help? Thank you in advance.
Windows 10 64 bit
ESET NOD32 is my antivirus
Computer: All devices are affected
Wireless distance: Sitting right next to router