I could resolve DNS on my local subnet, and on the internet, but I was unable to resolve anything on the internal DNS servers at the main office that I was connecting to. Now on version 5.0.680 I was unable to resolve DNS on the other end of the VPN tunnel when connected. I thought my problems were over until I re-connected to test that the VPN was still working. I updated the first client and Success! I was able to connect, disconnect, and then continue to resolve DNS. I updated one of the client Macs to 10.6.5, but still no luck.Ī call to SonicWall ended up with them giving me a new version of the NetExtender software for the Mac, version 5.0.680. I started with a review of the release notes of the SonicWall firmware, which mention a problem with Mac OS prior to version 10.6.5 and NetExtender. I had already updated the endpoint device, a SRA 1200, and the NetExtender was whatever version came with SRA 1200 firmware SonicOS SSL-VPN 4.0.0.3-20sv, which was the most recent firmware available at the time of writing.

Once the connection was ended, boom, no DNS resolution. The problem didn’t appear until after the software was connected to a endpoint, and then disconnected.

The client computers were able to resolve DNS properly prior to installation. Over the last few days I’ve been running into a problem with Mac OS 10.6 clients and the SonicWall SSL VPN client, NetExtender.

Dell sonicwall netextender windows 10