You need the OpenSSL development headers.
sudo apt-get install libssl-dev
Я наблюдаю следующую проблему при установке FreeRADIUS Server v2.2.5
configure: error: in `/root/freeradius-server-2.2.5': configure: error: failed locating OpenSSL headers See `config.log' for more details root@ip-ent-fvt-psi1:~/freeradius-server-2.2.5#
You need the OpenSSL development headers.
sudo apt-get install libssl-dev