AngeL is a Linux kernel module designed to work with version 2.4.0 or later. It uses the new netfilter firewalling facility in order to control all packets leaving from your host. AngeL will also compile on the old 2.2.xx family kernels, using the ipchains firewalling facilities.
AngeL is a tool that makes your host unable to send hostile traffic across the network. It also blocks a large number of root compromise attacks and local denial of services, by using system call wrappers that perfom sanity checks on the input parameters before invoking the original system calls.
The version available for download is the latest development version. If youre looking for the latest stable version check out the developers homepage.