Why is the default 192.18.0.0/16?
That's a public IP range that belongs largely to Sun Microsystems. The UI then goes further to instruct the administrator: This is the address pool to be used for L2TP connections. The server will use the first IP address in the pool, with the rest being assigned dynamically to clients when they connect. You should not change this from the default of 192.18.0.0/16 unless you have a specific reason to do so. DO NOT set this to the same address block as your internal network.
Which is great, because every Untangle admin on the planet has a VERY GOOD reason to change it. That IP range isn't within the Private RFC address ranges, and therefore will cause problems if used.
I suggest a change to 10.18.0.0/16, or a 172.16.something or other that doesn't conflict with the defaults in the OpenVPN module.
That's a public IP range that belongs largely to Sun Microsystems. The UI then goes further to instruct the administrator: This is the address pool to be used for L2TP connections. The server will use the first IP address in the pool, with the rest being assigned dynamically to clients when they connect. You should not change this from the default of 192.18.0.0/16 unless you have a specific reason to do so. DO NOT set this to the same address block as your internal network.
Which is great, because every Untangle admin on the planet has a VERY GOOD reason to change it. That IP range isn't within the Private RFC address ranges, and therefore will cause problems if used.
I suggest a change to 10.18.0.0/16, or a 172.16.something or other that doesn't conflict with the defaults in the OpenVPN module.