On 29 March 2007, CLEO was configured for and tested on
IPsec and
IPv6 use, making this the first use of IPv6 on board a satellite in orbit.[4][5][6]
The use of CLEO builds on and validates the approach to use of the
Internet Protocol articulated by Keith Hogie with
NASA Goddard and first demonstrated as part of the Operating Missions as Nodes on the Internet (OMNI)[7] effort on board the
UoSAT-12 satellite built by SSTL.[8][9][10]
^L. Wood et al.,
IPv6 and IPsec on a satellite in space, conference paper IAC-07-B2.6.06, 58th International Astronautical Congress, Hyderabad, India, September 2007.
^L. Wood, et al.,
Using Internet nodes and routers onboard satellites, special issue on Space Networks, International Journal of Satellite Communications and Networking, volume 25 issue 2, pp. 195-216, March/April 2007