Business customer. We have 13 Desktop PC's connected to a domain controller running through a firewall and the into the 4gEE Home Router 3. Apart from the Home Router, this setup worked flawlessly in a previous office on a leased line, but since moving we've had to use 4GEE as a temporary stop gap solution till a new leased line gets installed. So the only thing that has altered on our network is the 4GEE Home Router 3.
Problem: All 13 network clients (Win 10 Pro) machines have issues getting to "some" websites and the problem seems worse with websites that require some sort of login (form submission). Their browsers (whether Edge/Chrome/Firefox) will just timeout or instantly display a check your connection message. Running speedtest.net throughout the day doesn't point to a signal issue with the EE router itself as it consistently gets in the 30 to 50gb range, upload speeds also seem ok at around half that.
Our external IT note that logging into the server (domain controller) is fast and doesn't show any issues in connection quality. Though logging into a client machine via teamviewer on the network is slow, almost laggy/jittery (Cat6 cabling throughout). It's as though there is some sort of DNS problem occuring.
What I've tried: Seen various topics of similar ilk on this forum and tried the following:
What I haven't yet tried:
Anyone other customers had similar issues?
