Can't telnet to cisco router from outside network. Inside works fine

[ejeangilles]

Hello all!

I have aproblem that I'm just stuck on. I have a practice lab in my network with an access server. I have comcast and a linksys router as my firewall. I have been doing port forwarding for some time to access my computers such as rdp, ftp, etc so i'm familiar with it. I can't seem to telnet to my cisco router from the outside I have dyndns setup and its been working fine. I can't telnet wheher its by domain name or IP address. I opened ports 23 on my router and that doesn't work. I can telnet internally to my router just fine but not externally. This router has IOS 12.4 enterprise. Any help would be appreciated!!

 

[burtsbees]

Static NAT. Post a sh run from the router. Also, post a sh ver---with the right IOS, you really should set up ssh, and not telnet.

It should be straightforward---try a port scan to see if 23 is open, but like I said, I would just ssh (port 22). Telnet passes info all in cleartext, and ssh encrypts it (at least more secure, but still vulnerable).

Burt

 

[ejeangilles]

I'm not using NAT on my cisco router its just a device on my network I'm trying to telnet to. Right now I prefer to get anyone setup even if it is telnet. Here's the info

r1#sh run
Building configuration...

Current configuration : 1028 bytes
!
version 12.4
service config
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r1
!
boot-start-marker
boot-end-marker
!
enable password matrix
!
no aaa new-model
no network-clock-participate slot 1
no network-clock-participate wic 0
ip cef
!
!
!
ip auth-proxy max-nodata-conns 3
ip admission max-nodata-conns 3
!
!
!
!
interface FastEthernet0/0
ip address 192.168.1.151 255.255.255.0
ip broadcast-address 0.0.0.0
duplex auto
speed auto
!
interface Serial0/0
ip address 10.1.100.1 255.255.255.0
ip broadcast-address 0.0.0.0
!
interface FastEthernet0/1
no ip address
ip broadcast-address 0.0.0.0
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
ip broadcast-address 0.0.0.0
shutdown
!
ip forward-protocol nd
!
!
ip http server
no ip http secure-server
!

!
control-plane
!
!

line con 0
line aux 0
line vty 0 4
password matrix
login
transport input all
!
!
end

sh ver.....
Cisco IOS Software, C2600 Software (C2600-ADVENTERPRISEK9-M), Version 12.4(18), RELEASE SOFTWARE (fc1)
Technical Support:

http://www.cisco.com/techsupport

Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Fri 30-Nov-07 15:38 by prod_rel_team

ROM: System Bootstrap, Version 12.2(7r) [cmong 7r], RELEASE SOFTWARE (fc1)

r1 uptime is 8 minutes
System returned to ROM by reload
System image file is "flash:c2600-adventerprisek9-mz.124-18.bin"


This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
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If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco 2621XM (MPC860P) processor (revision 1.0) with 127308K/3764K bytes of memory.
Processor board ID JAE073419T8
M860 processor: part number 5, mask 2
2 FastEthernet interfaces
2 Serial interfaces
32K bytes of NVRAM.
32768K bytes of processor board System flash (Read/Write)

Configuration register is 0x2602

 

[brianinms]

You need a default route.


ip route 0.0.0.0 0.0.0.0 192.168.1.x

Where x equals your default gateway

 

[ejeangilles]

Dude! Your awesome...I set the the default route on my router just like you said and it worked right away. Thanks a lot !!!!

 

[unclerico]

cough cough star cough cough

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