Best places to get help is listed at the bottom of:
file:///usr/share/doc/packages/SuSEfirewall2/README.html
For discussion about SuSEfirewall2 join the opensuse-security mailinglist.
Most of it got rewritten and enhanced by it's current maintainer Ludwig Nussel :
ludwig.nussel@suse.de
More:
Transparent Squid = Not working (SOLVED) - openSUSE Forums