saya mendapat kesalahan ketika saya mencoba menginstal L2TP .. dapat membantu saya .. menyelesaikan masalah ini
root@t-Aspire-5742:/# sudo ipsec verify Checking your system to see if IPsec got installed and started correctly: Version check and ipsec on-path [OK] Linux Openswan U2.6.37/K3.5.0-42-generic (netkey) Checking for IPsec support in kernel [OK] SAref kernel support [N/A] NETKEY: Testing XFRM...