Here is a really cool program I found called SSL-Explorer which allows me to access all of by resources at home using Java and encrypting it in SSL sshtools.com . If you only want to access the CLI of you router I would strongly suggest using SSH to access your router as telnet is sent in clear text. Of course use a strong username and password.
aaa new-model
username remoteadmin password 0 C!sc0Pa$$w*d
ip domain-name cisco.com <-- DNS domain
cry key generate rsa <-- Generates an SSH key to be used with SSH.
ip ssh time-out 60
ip ssh authentication-retries 2
line vty 0 4
transport input telnet <-- Prevent non-SSH Telnets
Verify with a show command
Router-HQ#sh crypto key mypubkey rsa
% Key pair was generated at: 07:57:55 CST Mar 10 1993
Key name: Router-HQ.cisco.com
Usage: General Purpose Key
Key Data:
305C300D 06092A86 4886F70D 01010105 00034B00 30480241 00CF83BB EE440A08
DB272A16 B03BFB9B D4B06E4C 8B7BDB95 6DAB7604 469B52B0 B43B008A A68D1F9F
7D7D2710 D89CA51F 353179DD 587C0E75 5822BB31 6EF8437C AB020301 0001
% Key pair was generated at: 21:58:19 CST Mar 13 1993
Key name: Router-HQ.cisco.com.server
Usage: Encryption Key
Key Data:
307C300D 06092A86 4886F70D 01010105 00036B00 30680261 00EEF9C1 75AEB1D8
6C65E12C 7D1FBA6B 0BFA1821 0F5A514E 21926BB6 595D476E 3696AB9C 39D0D5EF
784D0074 EAA563A5 977CD0A7 0B32905C 1003AD31 2B65478D 76797F42 712081EC
3D9E58DC 512D74B8 848480D1 4D3EFBDE 1D740E39 C0AF61E0 5F020301 0001
Router-HQ#
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