The Russian army, as well as the intelligence services, have developed Astra Linux from Rusbittech based on Debian Gnu/linux, in the demand for information infrastructure security protection.
Astra Linux claims that its license complies with Russian law and does not violate the GPL free software license.
The source code for Astra Linux can be found here. From the 1.1 features can be seen: in addition to common applications like Firefox, LibreOffice, Astra integrates the once-popular Russian national cryptographic algorithm GOST and the Linux 4.2 kernel-based highly customized version, as can be seen from the source code, its integrated PaX Patches (not found in grsecurity) and a complete implementation that is independent of the standard MAC (mandatory access control, Selinux/apparmor/smack/tomoyo), the extracted patches are 97MB.
In addition to the Russian military's Astra Linux, French intelligence agencies use a DEBIAN+GRSEC-based distribution.
This address: http://www.linuxprobe.com/astra-linux.html
Russian military's Gnu/linux release: Astra Linux