If not, or if you aren't sure, look at Common Problems. By default, Open VPN only sends some traffic through the VPN — traffic that is specifically destined for the VPN network itself.The "--redirect-gateway" option tells Open VPN to send all traffic through the VPN.VPN clients will not be able to resolve DNS host names on the internal network if they are not assigned a DNS server address by the ISA Server firewall/VPN server.In most cases, the VPN client already has a DNS server address assigned to it.Can somebody please tell me where I would set this up?joeqwerty answered this as a comment and never moved it to the answer field so I'm answering it instead.This might be OK for some scripts, but I don't want to actually allow scripting on the client computers and sometimes I want to run these scripts on-demand, I'm gathering what I need through Get-Wmi Object for the most part.Your clients are not registering their IP addresses with DNS for the simple reason that they're not configure to, when connecting to the VPN.
Is there a way to get the clients to automatically update the forward and reverse records with this IP?
VPN clients connect to the ISA Server firewall/VPN server with the goal of accessing resources on the internal network.
VPN clients will not be able to access these resources using a DNS host name if the client cannot properly resolve that name to an IP address.
This guide is meant for the most common setups, so if it doesn't apply to your situation, or doesn't help, ask the Tunnelblick Discussion Group or the Open VPN users mailing list for help.
This page assumes that you are successfully connected to a VPN server.