There isn't any sort of intentional limitation based on the subnet.
A few things:
- Try a DNS/hosts entry forward-reverse for the LEM appliance's IP address and use it (default hostname is swi-lem)
- Does it work with the Desktop Console (i.e. only affects the web console)? (Available from SolarWinds Knowledge Base :: Additional LEM Downloads)
- After it fails on the web console on subnet B, does it still work from subnet A?
We've had a couple of reports of issues from the web console where the desktop console DOES work, but those were cases where customers weren't able to log in at all. The symptoms are similar, though, so I'm wondering if these are both the same issue.
I did try the DNS hosts entry but still didn't work.
The Desktop Console does work from other subnets, but still the web console fails unless on the same subnet as the server.
A failure of the web console in subnet B doesn't stop it working in subnet A.
We are happy to use the dekstop console, so we'll just ignore the web console issue.