华为AR18-31路由器，远程telnet配置

#
cpu-usage cycle 1min
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nat address-group 0 121.28.195.18 121.28.195.19
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radius scheme system
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domain system
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local-user admin
password simp 123456 service-type telnet terminal
level 3
service-type ftp
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acl number 2000
rule 0 permit source 192.168.0.0 0.0.0.127
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acl number 3000
(删减)
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interface Aux0
async mode flow
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interface Ethernet0/0
speed 100
duplex full
description TO-OFFICE-NET
#
interface Ethernet0/0.100
ip address 192.168.0.1 255.255.255.0
vlan-type dot1q vid 100
#
interface Ethernet0/1
description TO-INTERNET
ip address 121.28.195.22 255.255.255.0
nat outbound 2000 address-group 0
#
interface NULL0
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FTP server enable
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ip route-static 0.0.0.0 0.0.0.0 121.28.195.17 preference 60
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user-interface con 0
user-interface aux 0
user-interface vty 0 4
authentication-mode scheme
#
return
内网可以管理外网可以ping通，telnet不通，有可能是什么原因？
请大侠急救。光猫直接接入ETHER 1
说问题出在哪就行