any info on vpn with pptp

[Shekhar Joshi]

hello
i am trying to implement a gateway-firewall solution
using iptables on redhat 7.1, i also need to allow
incoming vpn connections using pptp, and also need to
allow around 15-20 outgoing vpn connections to a
remote network.

well allowing incoming connections through important
is not urgent, but yes i need to be able to allow the
outgoing vpn connections. 
currently i have just SNAT'd the vpn clients and
allowed the the ports 1723 and protocol 47, does
anyone have any detailed step by step info on how to
implement the above.

as of now i am able to allow outgoing vpn connections
but the max limit is 4, why does it not allow more
connections any ideas? actually after more than 4
connections, the client is able to authenticate but
later it says infinitely trying port and hangs out on
the w2k-vpn-client.

regards 
gotya

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