First of all download the ssl extender from checkpoint. You will need to have access in order to get it
You will end up with snx_install.sh
Change its permissions if not already executable
chmod a+x snx_install.sh
Install it
sudo ./snx_install.sh
In order to run it you will need libstdc++5 which is NOT included in Ubuntu 9.10. You can download it from here and install it directly after downloading it. If the link does not work you can google it.
UPDATE: For 64bit Ubuntu installations it is imperative that you install the 32bit libc-6 libraries and 32bit libpam as well as libstdc++5:i386
apt-get install libc6-i386 libpam0g:i386
What this package does is put the libstdc++5.so to /usr/lib, hence you do not need to use LD_PRELOAD or anything else you might have seen written in various forums.
Give snx a try to see if it working by issuing the following command
snx
If everything installed well you will be presented with the help screen
This is it. Open up your favorite browser to you ssl page and everything should be fine.
Hope it helps.