The SINUS firewall. For linux 2.2.x kernels. The only firewall under linux with a portable GUI interface, which works with JDK 1.2 under Windows, Linux, OS/2, Solaris and more. This version fixes some problems with tcp reject on 2.2.x kernels. (Official Site)
You can download it from the following link: https://packetstormsecurity.com/files/download/11740/sifi-14-10-1999.tar.gz
Source: https://packetstormsecurity.com/files/11740/sifi-14-10-1999.tar.gz.html