Ok, this one is odd and I don't even know what info to provide here.
I have several devices on my network, and two of them are employer supplied Windows laptops. Both of them have a version of Cisco VPN client installed, although they are different versions.
When I connect Laptop 1 (mine) to my employer's VPN all is good and happy.
When I connect Laptop 2 (my partners) to their (different) employer's VPN, all external communication stops for every device and I have to disconnect and then reconnect the ADSL connection.
Internal communication is fine, but all internet traffic stops. The ADSL status says CONNECTED, but nothing goes through without reconnecting. This happens 100% of the time. When I look at the logs, it reports a DoS attack from the employer's IP address, but there are plenty of other DoS attacks listed pretty much daily and they don't take me out. Another odd thing is that the laptop in question will get 4-5 different IP addresses very quickly. The employer has basically wiped their hands of it and will not help so I'm being yelled at to get it fixed, but there's not a whole lot of info.
Any ideas?
