Hi,
You cannot telnet to the outside interface of the ASA in clear text.
You have couple of choices:
Telnet through IPSEC
SSH
HTTP over SSL (https) with ASDM
ASA7.0 Allowing Telnet Access:
The security appliance allows Telnet connections to the security
appliance for management purposes. You cannot use Telnet to the
lowest security interface unless you use Telnet inside an IPSec
tunnel.
http://www.cisco.com/univercd/cc/td/doc/product/multisec/asa_sw/v_70/config/
mgaccess.htm#wp1054101
To configure SSH, please check following URL.
PIX/ASA 7.x: SSH on the Inside and Outside Interface Configuration Example
http://www.cisco.com/en/US/partner/products/hw/vpndevc/ps2030/products_confi
guration_example09186a008069bf1b.shtml
Regards,
Arul
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