PIX 501 with multiple External IP's & VPN

Is it possible to use the VPN functionality of the 501 on any of the external IP's or am I locked into using it only with the external interface IP?

example of external IP's

1.1.1.1 <--external interface ip
1.1.1.2 <--mail server
1.1.1.3 <--FTP server
1.1.1.4 <--VPN????

I'm confused...help!

Thanks!
dsa_erieAsked:
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calvinetterCommented:
You'll need to use the actual IP of the external interface.  The "multiple External IP's" you're referring to are simply there as references for the PIX's static NAT entries for forwarding traffic to internal servers.

cheers

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arvindSR Manager OperationCommented:
agree with calwin -- VPN will work only outside interface IP or if you have more interface then It shud work with that interface
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