asa 5520 dhcpd option to register name in DNS

[tanzeus129]

I have a ASA 5520 that does VPN.

The ASA has a pool of ip addresses that it gives to the client when they connect.

I also specify which DNS servers to use.

Is there a way to force the client to register their IP's in the DNS servers that they are configured to use?

[lginod]

Hello Tan,

The way the dhcp works for VPN is not the regular way where we send a dhcp request with the client mac and it sends a dhcp reply with the ip and then registers the ip with the mac on the dhcp server. In this case the Asa acts as a dhcp proxy and hence it is not possible to register the Mac address of the vpnclient with the ip assigned since the Mac address of the VPN client can never be sent as a part of the IPSec exchanges.

Sent from Cisco Technical Support iPhone App

[tanzeus129]

If that is so, then how come the IP's get registered when the client checks the box "register this adapter's IP in DNS"?

thanks!