path pre_shared_key "/home/nad/Desktop/psk.txt";
remote 192.168.1.2
{
 exchange_mode main;
 proposal
 {
    encryption_algorithm 3des;
    hash_algorithm md5;
    authentication_method pre_shared_key;
    dh_group modp1024;
  }
}
sainfo address 192.168.1.1 any address 192.168.1.2 any
{
  pfs_group modp768;
  encryption_algorithm 3des;
  authentication_algorithm hmac_md5;
  compression_algorithm deflate;
}
sainfo address 192.168.1.2 any address 192.168.1.1 any
{
 pfs_group modp768;
 encryption_algorithm 3des;
 authentication_algorithm hmac_md5;
 compression_algorithm deflate;
}