We have a Sonicwall 100 that we are trying to replace with a WG FB1000. We have a pretty standard network, with 3 subnets with DHCP served from windows 2000 servers (dual-homed), and routing between subnets done by the win2k servers as well. I've done my best, with the help of a watchguard specialist, to configure both devices the same, including routing etc. When I try to replace the device, I power down all equipment (DSL router, firewall) and power up fresh, and replace the Sonicwall with WG FB1000. The VPN tunnels come up fine (Branch Office is set up with another WG FB1000 device in another location), and we've intended to set up both devices exactly the same. It seems that connectivity is 100% from MOST machines on the network, but some are having problem connecting to our CRM website salesforce.com, and a handful of other websites (express-inc.com is another)....the web browser just hangs (the standard "The page connot be diplayed" does not even come up). I can ping the website from the PC's that can't resolve, so they appear visible to the PC based on IP address. I've reviewed the internal LAN, and looked at DNS resolution, and all machines are using the same DNS server internally for resolution. But thinking back on this approach, it wouldn't make sense that if there was a DNS problem on the LAN when using the Sonicwall device, all websites resolve properly.
So, I'm pointed to maybe a difference in the devices, maybe the Watchguard device does something that the Sonicwall doesn't (or vice versa)??
I've looked at the MTU setting for the WG FB1000 device (this was a necessary tweak for the Sonicwall device to operate properly when set up over 3 years ago), and I set them identically (with help from WG specialist). This is an unsupported code tweak in the config file. No success.
Any help on resolving this situation would be most appreciated!!
So, I'm pointed to maybe a difference in the devices, maybe the Watchguard device does something that the Sonicwall doesn't (or vice versa)??
I've looked at the MTU setting for the WG FB1000 device (this was a necessary tweak for the Sonicwall device to operate properly when set up over 3 years ago), and I set them identically (with help from WG specialist). This is an unsupported code tweak in the config file. No success.
Any help on resolving this situation would be most appreciated!!