We are trying to open up port for our customer on their Sonicwall 2040.
They originally had port 25 opened to a group of IP ranges which works fine, i tried to duplicate this rule with our IP ranges but it didn't work (I created a new network object with our range and then added a access rule).
I then added our range to the group that they already had set up and this works fine.
However, we now need to open up another port (service) to our IP range so I'll need to create a new rule, however our connections are still being rejected.
Sorry for the vagueness, but do you have any ideas what I'm doing wrong?