Cisco VPN 4.9 and Microsoft Remote Desktop issue

Hi everyone,

So I've installed the latest Cisco VPN client on Mac OS and I have installed Microsoft Remote Desktop. I'm able to connect to the VPN, however I'm only able to RDP into ONE PC on the other end. The rest of them won't connect.

So what i've noticed is that in the ARP table is that it's receiving incomplete entries. Now if I manually add a arp entry, it'll connect fine to the PCs.

Now on any Windows PC we've installed the VPN client, it's able to connect and RDP into any PC. What could be blocking the arp requests from being sent to the MAC? We only have a Cisco PIX setup (which was actually set up by someone else). Could there be something on the PIX that needs to be configured even though it works perfectly fine in Windows?

Thoughts? 😢