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Hello everyone. I had headache with SNX too, but after many hours searching and reading I did resolve this problem.

SK's: 

sk43935 Failure to connect with SSL Network Extender via Ubuntu 7 CLI
sk114267 How to install SSL Network Extender (SNX) client on Linux machine
sk65210 SSL Network Extender
sk90240 SNX Installation Package for Linux OS client

My linux host is Linux Mint, which I updated and upgraded to last patches:

Linux vmLinuxMint 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Java coming with such linux flavor, is ...

openjdk version "10.0.2" 2018-07-17
OpenJDK Runtime Environment (build 10.0.2+13-Ubuntu-1ubuntu0.18.04.4)
OpenJDK 64-Bit Server VM (build 10.0.2+13-Ubuntu-1ubuntu0.18.04.4, mixed mode)

With all above installed, I ran:

prompt>sudo apt install libpam0g:i386  libx11-6:i386 libstdc++6:i386 libstdc++5:i386 libnss3-tools

Then I installed SNX, but something rare, snx client that donwloaded from my FW remote access portal don't work for me, so I downloaded snx client from sk90240. and made it executable, after that...

prompt>sudo sh ./snx_install_linux30.sh

and connect to remote FW

prompt>snx -s (ip-wan-fw) -u user

Check Point's Linux SNX
build 800010003
Please enter your password:

SNX - connected.

Session parameters:
===================
Office Mode IP : A.B.C.D
Timeout : 8 hours

I  hope this work for you.

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