Linux IPSec VPN and Cisco Firewall VPN

[Bradley Hook <bhook@xxxxxxxx>]

I'm running a Slackware 9.1 box as a firewall, upgraded to kernel 2.6.4. 
I need to create a VPN to another site that is using a Cisco Firewall 
with VPN support (not sure exactly what model/revision). Does this work? 
How well does it work? Are there any quirks I should expect to run into? 
If anyone has any good docs or some pointers to get me started I would 
appreciate it. I would like to use the native kernel IPSec support over 
FreeS/WAN if at all possible.

Thanks,
~Brad Hook
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