I am looking for current thinking on the topic of remote access to a mixed network.

Situation
I am the security manager for a large network, that is composed of mostly Win NT server and desktops, but does have Novell networks as well. Access in is via firewall.

In the past remote access was only available via a secure dialup connection using a secure fob, password etc.

Am wondering if this is still the most appropriate way to go.