We have a sonicwall TZ170. We have 2 internet dsl lines and I want to do load balancing. I have set up the OPT port correctly. When I turn it on, it work great except for one problem. DNS resolution get all messed up.
Example: yahoo.com does not go to yahoo but if I type in their IP address, it works.
Any DNS lookup from firewall resolves correctly. The workstations on the network do not work correctly.
For the DNS Server on my main server, it forwards to:
1 and 2 go to my primary ISP's DNS servers
3 and 4 go to my secondary ISP's DNS servers
5 goes to my sonicwall. My sonicwall has its correct information for each ISP setup on each port. I turn on the Load Balancing and while a bandwidth test shows that it is working fast, my attempts to check webpages are stopped.
Any ideas on how to fix this problem? Maybe the fowarders are set incorrectly.