Sir,
We are facing difficulties to access some of websites from our Private Network(Inside Network Connected through SonicWALL 8500).
We have raised a complaint to SonicWALL. They told that, There is problem with DNS Server. But, I am not able confirm and conclude that, whether it is DNS Problem. Because, All other Website's are opening fine. No issue with that.
This is our Scenario. We are having Two ISP's. We have connected these two ISP Links to SonicWALL 8500. These two ISP are configured in Load balancing Method in SonicWALL. We are having 4 DNS Server's in Public IP's and Two DNS Server's in our Local Network for Local Users.
We are facing this issue in our Local Network only(Which is connected to the Internet through SonicWALL ). We have checked these Sites from our both ISP IP's directly. It is working fine.
What are the steps to identify whether it is DNS Problem? Also, From SonicWALL side they asked us to add our Outside DNS IP address in our Local DNS(Inside DNS). Is it required?
In my point of view, Without this IP entry all other websites are working fine. Is it required?
Please help us to resolve this issue.
Thavamani Shanmugam