We currently have a Netgear router connected to our ADSL line. A Sonicwall firewall is giving DHCP and is connected to the router which is connected to a switch respectively so all users traffic goes via the firewall before hitting the internet. The firewall is also configured as a VPN back to our head office firewall giving us LAN / WAN access.
Using this setup, we get internet, LAN / WAN access etc with no problems, however intermittently after anywhere between 15mins - 1 hour the ADSL will disconnect and the router and firewall needs to rebooted to get it back up and running ...
I have now taken the Sonicwall firewall out of the equasion (so it's just a standard ADSL connection and router) and the connection stays up fine! As soon as the firewall is added into the loop again the intermittent disconnects start happening!
Thanks in advance.