l2tp vpn已经到这种程度了，为什么还不能上网？／

[gaozhimin22]

Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: Call established with 192.168.10.2, Local: 30457, Remote: 171, Serial: 1 (ref=0/0)
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: start_pppd: I'm running:
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "/usr/sbin/pppd"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "passive"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "-detach"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: ":"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "auth"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "require-pap"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "require-chap"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "name"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "c0700703131@jlxy"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "file"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "/etc/ppp/options.l2tpd"
Apr 25 01:29:19 gaozhimin-desktop xl2tpd[4786]: "/dev/pts/1"
Apr 25 01:29:19 gaozhimin-desktop pppd[5781]: pppd 2.4.4 started by root, uid 0
Apr 25 01:29:19 gaozhimin-desktop pppd[5781]: Using interface ppp0
Apr 25 01:29:19 gaozhimin-desktop pppd[5781]: Connect: ppp0 <--> /dev/pts/1
Apr 25 01:29:22 gaozhimin-desktop pppd[5781]: PAP authentication succeeded
Apr 25 01:29:22 gaozhimin-desktop kernel: [ 202.370231] PPP BSD Compression module registered
Apr 25 01:29:23 gaozhimin-desktop kernel: [ 202.459991] PPP Deflate Compression module registered
Apr 25 01:29:23 gaozhimin-desktop pppd[5781]: not replacing existing default route via 172.18.8.1
Apr 25 01:29:23 gaozhimin-desktop pppd[5781]: Cannot determine ethernet address for proxy ARP
Apr 25 01:29:23 gaozhimin-desktop pppd[5781]: local IP address 220.184.250.5
Apr 25 01:29:23 gaozhimin-desktop pppd[5781]: remote IP address 220.191.128.111

还是上不了网。。。哪里出问题了？？？