请教有关vpn的问题,在线等，急...

我公司用的是华为2621的路由器，设置如下：

[Router]dis cu
Now create configuration...
Current configuration
!
    version 1.74
    local-user admin service-type administrator password simple admin
    local-user yb service-type ppp password simple yb
    l2tp enable
    ip pool 1 192.168.0.100 192.168.0.150
    firewall enable
    aaa-enable
    aaa accounting-scheme optional
!
acl 2000 match-order auto
    rule normal permit source 192.168.0.2 0.0.0.0
    rule normal permit source 192.168.0.1 0.0.0.0
    rule normal permit source 192.168.0.3 0.0.0.0
    rule normal permit source 192.168.0.4 0.0.0.0
    rule normal permit source 192.168.0.5 0.0.0.0
    rule normal permit source 192.168.0.6 0.0.0.0
    rule normal permit source 192.168.0.7 0.0.0.0
    rule normal permit source 192.168.0.8 0.0.0.0
    rule normal permit source 192.168.0.9 0.0.0.0
    rule normal permit source 192.168.0.10 0.0.0.0
    rule normal permit source 192.168.0.11 0.0.0.0
    rule normal permit source 192.168.0.12 0.0.0.0
    rule normal permit source 192.168.0.13 0.0.0.0
    rule normal permit source 192.168.0.14 0.0.0.0
    rule normal permit source 192.168.0.15 0.0.0.0
    rule normal permit source 192.168.0.16 0.0.0.0
    rule normal permit source 192.168.0.17 0.0.0.0
    rule normal permit source 192.168.0.18 0.0.0.0
    rule normal permit source 192.168.0.19 0.0.0.0
    rule normal permit source 192.168.0.20 0.0.0.0
    rule normal deny source any
!
acl 3001 match-order auto
    rule normal deny tcp source any destination any destination-port equal 445
!
acl 3002 match-order auto
    rule normal deny tcp source any destination any destination-port equal 5554
!
acl 3003 match-order auto
    rule normal deny tcp source any destination any destination-port equal 9996
!
acl 3004 match-order auto
    rule normal deny tcp source any destination any destination-port equal 135
    rule normal deny tcp source any destination any destination-port equal 136
    rule normal deny tcp source any destination any destination-port equal 137
    rule normal deny tcp source any destination any destination-port equal 138
    rule normal deny tcp source any destination any destination-port equal 139
    rule normal deny tcp source any destination any destination-port equal 443
    rule normal deny udp source any destination any destination-port equal 135
    rule normal deny udp source any destination any destination-port equal 136
    rule normal deny udp source any destination any destination-port equal 445
    rule normal deny tcp source any destination any destination-port equal 445
    rule normal deny udp source any destination any destination-port equal netbi
os-ns
    rule normal deny udp source any destination any destination-port equal netbi
os-dgm
    rule normal deny udp source any destination any destination-port equal netbi
os-ssn
!
interface Aux0
    async mode flow
    link-protocol ppp
!
interface Ethernet0
    ip address 192.168.0.88 255.255.255.0
    firewall packet-filter 3004 inbound
    firewall packet-filter 3003 inbound
    firewall packet-filter 3002 inbound
    firewall packet-filter 3001 inbound
    firewall packet-filter 3001 outbound
!
interface Ethernet1
    ip address 220.166.123.x 255.255.255.0
    nat outbound 2000 interface
    nat server global 220.166.123.x www inside 192.168.0.3 www tcp
    nat server global 220.166.123.x 5632 inside 192.168.0.11 5632 tcp
    nat server global 220.166.123.x 5631 inside 192.168.0.11 5631 tcp
    nat server global 220.166.123.x 1433 inside 192.168.0.3 1433 tcp
!
interface Serial0
    link-protocol ppp
!
interface Serial1
    link-protocol ppp
!
interface Virtual-Template1
    link-protocol ppp
    ppp authentication-mode chap
    remote address pool 1
    ip address unnumbered Ethernet0
!
l2tp-group 1
! Default L2TP group
    allow l2tp virtual-template 1
    mandatory-lcp
    mandatory-chap
    tunnel name yb
    undo tunnel authentication
!
quit
ip route-static 0.0.0.0 0.0.0.0 220.166.123.1 preference 60
!
return