The following applies to tinc: This program is released under the GPL with the additional exemption that compiling, linking, and/or using OpenSSL is allowed. You may provide binary packages linked to the OpenSSL libraries, provided that all other requirements of the GPL are met. The following applies to the LZO library: Hereby I grant a special exception to the tinc VPN project (http://tinc.nl.linux.org/) to link the LZO library with the OpenSSL library (http://www.openssl.org). Markus F.X.J. Oberhumer