Witch firewall tool can i use.

[Master_PE <debian@masterpe.nl>]

I have a firewall with iptables. In this router i have 4 nics, one for
the internet, one for the server i use and one for the clients. For the
last nic i dont have a purpes for.

Internet
    |
+------------+
|Router      |-ServerNET(192.168.200.0/24)
+------------+
    |
ClientNET(192.168.100.0/24)

I also have a PPTP connection and an PPTPD server on the router.

In the futer i want to replace PPTPD of IPSEC.

And last but not least i use IPv6.

So my question is, is there a tool to build and manage the firewall? I
have my own script but it is going to be a little complex.

Regards,

Master_PE