Ipsec + firewall

Hi list! We are using in an test environment on 2 "firewall PC's" with SuSE 7.0 + ipsec. The configuration looks as follows: Local net A --- firewall 1 --- untrusted net --- firewall 2 --- local net B As soon as we start the firewall script (Version 4.1) ipsec doesn't work anymore. Does anyone have already experience which ports I have to open in the firewall script so that ipsec is working? Thanks for your help Wolfgang --------------------------------------------------------------------- Dr. Wolfgang Schulz Tel.Nr.: +43-1-3180566-12 ALDIS Fax: +43-1-3180566-9 Kahlenberger Str. 2b Mobil: +43-676-3566438 A-1190 Wien Email: w.schulz@ove.at Austria --------------------------------------------------------------------