I just changed our office firewall to a sonicwall TZ-190 series. I have five incoming static IP addresses. I have split DNS on my server because we use three web applications inside our network. The DNS says when using internal look to 192.168.1.16 for Exch2003.sbx.com , but when external look to 184.108.40.206. It has worked fine forever when we used a single static IP SOHO firewall from 3COM.
Now we are having users that are having routing problems because their pc's will not release the external IP when internal. I have the clear arp and flush dns and it works but this does not always work for everyone. Is there a way to allow traffic to flow from an internal user to an external IP and then right back in. I don't want to do it consistently but just when this fails. I think it is traversal?? but I am not sure. Any sonciwall experts out there?