Cannot telnet into router

What do I do when all of a sudden I can't telnet into my router through any interfaces?
I can ping the interfaces successfully, by IP and DNS name. Nothing has changed since the last successful login.
error msg:
Connecting To c3640...Could not open connection to the host, on port 23: Connect failed

The symptoms you describe sound like all the vty ports are in use. This may happen if you have configured the vty ports with no exec-timeout (or with exec-timeout 0 0 which is the same thing). If you can get to the console port the show user command (or the who command) should indicate which vty are in use - and I suspect that they all are.
If you can get to the console port and enable mode you could clear some of the sessions which would make telnet work again.
If you can not get to the console port you might wait and try later and see if it works after someone logs off. The other alternative is to reboot the router.
HTH
Rick

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line con 0
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logging synchronous
login local
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line 2
no activation-character
no exec
transport preferred none
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
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Hello Brad,
Try entering
line vty 0 4
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if so, please rate.

I cannot telnet into my WRT54GC linksys router

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I don't think the device has telnet access, try the web interface instead i.e. http://192.168.1.1

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Hi guys.
INet browsing via WiFi works (BB 9105), but I would like to get into my Router too, to reconfigure it. When I try to access my router, 192.168.1.1, or my ADSL modem (192.168.0.1) I always get the 504 error (Gateway Timeout), which is the same error I get when browsing through BIS.
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Hello Tato,
I hesitated posting here because I cannot give you a definitive answer, I've looked around and havn't seen any answers to this question specifically either.
What I can tell you however is using my mobile phone browser I have had no problems accessing my router while I am connected through WiFi, saying this I will also mention I use a DLink and am connecting with the same process in my case 192.168.0.1
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If this or any posts in this thread were helpful please Kudos the author.
If this or any posts in this thread were the solution to the topic, please accept the post as the solution so others can view it.

I cannot get into router page via server? But can on any other device?

Comcast Business Cisco 3939B wifi router.
I can log into the router page just fine on ANY other workstation or laptop direct connected to any of the 4 ports of the router using 10.1.10.1. I can access via Android phone browser via wifi also.
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This topic first appeared in the Spiceworks Community

Try these; 
Clear the Cache '''''Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"''''' 
and 
Remove Cookies '''''Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"''''' 
If that does not help,
'''''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode start Firefox in Safe Mode]'''''.
Let us know how you do.

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Hello,
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I've been trying and searching for an answer for hours.
problem:
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We've been trying to reset the modem for 10, 30 seconds.
Auto resolve IP/DNS. DHCP is enabled.
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Message Edited by Brammm on 11-27-2008 03:13 PM

Okay!
1. (results when having assigned a static IP) :
Windows IP-configuratie
         Primair DNS-achtervoegsel. . . . .:
        Knooppunttype: . . . . . . . . . .: onbekend     (unknown)
        IP-routering ingeschakeld. . . . .: nee      (no)
        WINS-proxy ingeschakeld . . . . . : nee    (no)
Ethernet-adapter LAN-verbinding:
         Verbindingsspec. DNS-achtervoegsel:
        Beschrijving . . . . . . . . . . .:
          VIA Compatable Fast Ethernet Adapter
        Fysiek adres. . . . . . . . . . . : 00-16-17-CE-D5-40
        DHCP ingeschakeld:. . . . . . . . : nee    (no)
        IP-adres. . . . . . . . . . . . . : 192.168.1.20
        Subnetmasker. . . . . . . . . . . : 255.255.255.0
        Standaardgateway. . . . . . . . . : 192.168.1.1
        DNS-servers . . . . . . . . . . . : 192.168.1.1
(results without having assigned a static IP: automatic config.) :
Ethernet-adapter LAN-verbinding:
        Verbindingsspec. DNS-achtervoegsel:
        Beschrijving . . . . . . . . . . .:
          VIA Compatable Fast Ethernet Adapter
        Fysiek adres. . . . . . . . . . . : 00-16-17-CE-D5-40
        DHCP ingeshakeld. . . . . . . . . : ja     (yes)
        Autom. configuratie ingeschakeld. : ja       (yes)
        IP-adres. . . . . . . . . . . . . : 84.30.99.32
Subnetmasker. . . . . . . . . . . : 255.255.254.0
Standaardgateway. . . . . . . . . : 84.30.98.1
DHCP-server . . . . . . . . . . . : 213.51.144.90
        DNS-servers . . . . . . . . . . . : 212.54.40.25
                                            212.54.35.25
2. I do have another router, when I try that one, the problem we have remains. So that's a bit strange to me. That one is supposed to be working.
Does this SES function configure anything other than the modem? So, does it alter PC configurations? I have no clue. We even start to wonder whether the ISP is able to set up their internet in a way that unables us to make use of a router? That would be ridiculous
Message Edited by Brammm on 11-30-2008 04:03 AM

Cannot telnet into router

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