可以从外网也可以从内网telnet到PIX上，从内网简单，不过从外网得作vpn，麻烦一些，也能用SSH 远程管理。 

从内网telnet： 

telnet 192.168.1.2 255.255.255.255 inside

从外网telnet:

Step 1 Set up IPSec by entering the following commands:

isakmp policy 10 authentication pre-share
isakmp policy 10 group 2
isakmp enable outside
crypto ipsec transform-set esp-des-md5 esp-des esp-md5-hmac
crypto dynamic-map dynmap 10 set transform-set esp-des-md5
crypto map mymap 10 ipsec-isakmp dynamic dynmap
crypto map mymap interface outside

Step 2 Set up an IP pool for the Telnet session by entering the following commands:

ip local pool tnpool 1.1.1.1-1.1.1.1

Step 3 Set up Telnet access by entering the following command:

telnet 1.1.1.1 255.255.255.255 outside

Step 4 Set up the VPN group for the remote Telnet user by entering the following commands:

vpngroup telnet address-pool tnpool
vpngroup telnet password 12345678
sysopt connetion permit ipsec

Step 5 Setup the VPN client authentication by entering the following commands:

group telnet
password 12345678

ok,现在就可以从cisco client上telnet

转载地址：http://www.net130.com/CMS/Pub/Tech/tech_instance/2005_06_10_7139.htm