配置PPP验证时CISCO路由器CHAP认证配置

在配置PPP验证时有PAP和CHAP的选择，其中PAP为明文传送用户名和口令，不安全。而CHAP则采用哈希值进行验证，口令不会在网上传送，所以安全性比较高。

CHAP认证也是CCNA课程PPP教学时所需掌握的基本配置，其配置如下：

拓扑： RA DTE--------DCE RB

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RA#conf t

RA(config)#username RB password hello

RA(config)#int s0

RA(config-if)#encap ppp

RA(config-if)#ppp au chap

RA(config-if)#end

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Router(config)#host RB

RB(config)#username RA password hello

RB(config)#int s0

RB(config-if)#encap ppp

RB(config-if)#ppp auth chap

%LINK-3-UPDOWN: Interface Serial0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to up

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RA#sh int s0

Serial0 is up, line protocol is up -------第一层二层UP

Hardware is HD64570

Internet address is 1.1.1.1/30

MTU 1500 bytes, BW 1544 Kbit, DLY 1000 usec, rely 255/255, load 1/255

Encapsulation PPP, loopback not set, keepalive set (10 sec)

LCP Open -----------打开

Open: IPCP, CDPCP -----------打开

Last input 00:00:00, output 00:00:00, output hang never

Last clearing of show interface counters never

Queueing strategy: fifo

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