Can't telnet any longer to router via port 23 once again

[John Cheetley]

Evening techs,

Can no longer telnet to router again from windows server 192.168.0.102. Was connected 4 days ago OK no problem

C:\Users\Administrator>telnet 192.168.0.12

Can telnet to switch OK on ip of 192.168.0.2

Error of :
Connecting To 192.168.0.12...Could not open connection to the host, on port 23:
Connect failed

Troubleshooting done

Have disabled and re-enabled telnet via services.msc

Have un-installed/re-installed telnet client/server

Firewall is off.

C:\Users\Administrator>tlntadmn \\thebeast config port=23
The settings were successfully updated.

C:\Users\Administrator>ping 192.168.0.12

Pinging 192.168.0.12 with 32 bytes of data:
Reply from 192.168.0.12: bytes=32 time<1ms TTL=64
Reply from 192.168.0.12: bytes=32 time<1ms TTL=64
Reply from 192.168.0.12: bytes=32 time<1ms TTL=64
Reply from 192.168.0.12: bytes=32 time<1ms TTL=64

Ping statistics for 192.168.0.12:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\Users\Administrator>tracert 192.168.0.12

Tracing route to 192.168.0.12 over a maximum of 30 hops

1 <1 ms <1 ms <1 ms 192.168.0.12

Trace complete.

netstat -a

Active Connections

Proto Local Address Foreign Address State
TCP 0.0.0.0:23 TheBeast:0 LISTENING

Is there a way that we can see what telnet is doing?

[Deepak Kumar]

Dear John,

Please check your switch or router configuration. If you are not familiar with Cisco then share here.. We will check and reply to you.

Regards,

Deepak Kumar

www.deepuverma.in

[John Cheetley]

Thanks deepak for your response.

My configuration hasn't changed since my last discussion raised. Unless you can't view that. Please let me know.

[Deepak Kumar]

Hi John,

Please share again. 

Regards,

Deepak Kumar

www.deepuverma.in

[John Cheetley]

Hi Deepak,

As requested

[pwwiddicombe]

Can you show us the description on the switchport that fast 0/0 is connected to?  You are trying to ping the interface itself, that the other 2 vlans are attached to.

Also, where are you attaching that you get the pings, but Telnet being refused (i.e. a port on one of the non-native vlans on the switch)?

[John Cheetley]

Thanks pwwiddicombe for your reply

fa0/0 is connected directly (via eth) to default gateway of 192.168.0.1

The switchport is on fa0/24

I am attempting to connect from 192.168.0.102 (windows server 2008) like I have always done before.

Not the switch. The switch is 192.168.0.2 thanks if that makes sense

[pwwiddicombe · Accepted solution]

I want to see what is the configuration of switchport 0/24.  Remember, effectively you have 3 vlans coming into the switch - 20, 30, and "native", whichever that is.  If you haven't declared it, that will be vlan1.

interface FastEthernet0/0
 ip address 192.168.0.12 255.255.255.0
 ip nat outside
 duplex auto
 speed auto
!
interface FastEthernet0/0.1
 description Data vlan 20
 encapsulation dot1Q 2
 ip address 192.168.1.2 255.255.255.0
!
interface FastEthernet0/0.2
 description Voice vlan 30
 encapsulation dot1Q 3
 ip address 192.168.2.2 255.255.255.0
 ip nat inside

[John Cheetley]

Hi pwwiddicombe,

I haven't made any changes to the switch yet

As requested.

[John Cheetley]

Hi pwwiddicombe,

I have also captured network monitoring output of telnetting from 192.168.0.102 to 12 but as it turns out, can't upload .cap files to this site. Unless I import it by other means.

[pwwiddicombe]

Zip it up?  7zip or other utility will create a compressed archive that can be uploaded here.

[John Cheetley]

Thanks Deepak,

I never used that command before ...transport input telnet ssh..I'm not using putty at this moment though. Unless I'm not understanding what your asking?

[Deepak Kumar]

Dear John,

I have seen your configuration and did not see any SSH configuration on the router. you are using telnet yet. Otherwise send me new configuration.

Regards,

Deepak Kumar

www.deepuverma.in 

[John Cheetley]

Hi deepak,

Current router configuration is attached.

[Deepak Kumar]

There is missing some VTY line configuration 

Plase share following command output

"sho running-config | be vty"

Regards,

Deepak Kumar