What is the latest IPF version for Sloaris 9?

Hi All,

Link http://coombs.anu.edu.au/~avalon/ shows IPF current version is
4.1.10. Does anyone know whether IPF 4.1.10 is fully tested and passed
on Solaris 9? So far, I only found IPF 4.1.4 is fully tested and passed
for Solaris 9 as web link
http://coombs.anu.edu.au/~avalon/ipfilter-status.html showed. But
somehow, I couldn't find IPF 4.1.4 source code package from ftp site.
Could you someone let me which IPF version I should use?

Thanks a lot.
--Xingwei