xl2tpd[7581]: "passive"

xl2tpd[7581]: "‐detach"

xl2tpd[7581]: "192.168.1.251:172.16.1.10"

xl2tpd[7581]: "refuse‐pap"

xl2tpd[7581]: "auth"

xl2tpd[7581]: "require‐chap"

xl2tpd[7581]: "name"

xl2tpd[7581]: "mm's L2TP VPN Server"

xl2tpd[7581]: "debug"

xl2tpd[7581]: "file"

xl2tpd[7581]: "/etc/ppp/options.xl2tpd"

xl2tpd[7581]: "/dev/pts/1"

xl2tpd[7581]: Call established with 192.168.1.55, Local: 64654, Remote: 1, Serial: 0

xl2tpd[7581]: network_thread: select timeout

xl2tpd[7581]: network_thread: select timeout

xl2tpd[7581]: child_handler : pppd exited for call 1 with code 10

xl2tpd[7581]: call_close: Call 64654 to 192.168.1.55 disconnected

xl2tpd[7581]: control_finish: Connection closed to 192.168.1.55, port 1701 (), Local: 26849,

Remote: 3

xl2tpd[7581]: build_fdset: closing down tunnel 26849

xl2tpd[7581]: Trustingly terminating pppd: sending TERM signal to pid 7633

xl2tpd[7581]: pppd 7633 successfully terminated

关于L2TP IPSec VPN 服务器的架设，暂且学习到这里，其中还有很多细节需要学习和熟悉，有待进一步的研究。