One of our Executives is attempting to VPN into our office via a L2TP VPN profile (which I created on my own iMac, tested, exported, and gave to him). When he attempts to connect to our office via his iMac (or MacBook) at home, he receives a prompt for his username and password, the VPN states "Connecting.." for about 1 minute, but before it is able to successfully connect it eventually times out and the connection fails to establish. I personally believe that the root cause of this issue is his Apple Airport Extreme Base Station he has at home. I have eliminated all other devices or configuration issues because: I am able to connect into the office via my iMac at home (connected to a D-Link router). When he brings his MacBook into the office and I segment it outside of our LAN and attempt to VPN into our office, it works fine. This issue is occurring with both his iMac and MacBook - which are both connected to his AEBS at home. I have tested his credentials both on my iMac and on his MacBook (when it is in the office) and our VPN accepts his credentials. However, when he is at home, it's a completely different story. We are running a SonicWALL Network Security Appliance in our office. I also have eliminated the chances of our IP Addresses conflicting because our office is 10.11.12.0/24 and his AEBS is 10.0.0.0/24. Is there something I have to do or configure on his AEBS to allow his iMac and MacBook to connect to our office's VPN?