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 > (https://www.tinc-vpn.org/) to link the LZO library with the OpenSSL library > (https://openssl.org). > > Markus F.X.J. Oberhumer When tinc is compiled with the --enable-tunemu option, the resulting binary falls under the GPL version 3 or later.