<div>
you need to verify the crypto key and ensure it's still there and generated. are you authenticating locally? do you have access to console?
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you need to verify the crypto key and ensure it's still there and generated. are you authenticating locally? do you have access to console?

<div>
Yes. Im consoled in @ the moment.
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<div>
did you check for RSA key? If you dont have it create it.
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did you check for RSA key? If you dont have it create it.

<div>
@ jovic<br />
What's the command to clear ssh on the router?
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@ jovic
What's the command to clear ssh on the router?

<div>
Basics are typically the same, however can depend on device type.<br />
<br />
If that happens too often configure login timeout on device (had to do it on one device):<br />
# line vty 0 15<br />
# exec-timeout &lt;minutes&gt;<br />
<br />
You can also use global configuration mode:<br />
# ip ssh time-out &lt;sec&gt; &nbsp; &nbsp; &nbsp;&lt;-- (1 -120 sec)<br />
should do the trick.<br />
<br />
Or you can configure TCL on device to periodically clear vty lines (at least some of them).<br />
<br />
Also manually clearing vty line should be possible to do with:<br />
#disconnect ssh 5<br />
or <br />
# clear line vty &lt;number&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;----- &nbsp;Reset a terminal line
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Basics are typically the same, however can depend on device type.

If that happens too often configure login timeout on device (had to do it on one device):
# line vty 0 15
# exec-timeout <minutes>

You can also use global configuration mode:
# ip ssh time-out <sec>      <-- (1 -120 sec)
should do the trick.

Or you can configure TCL on device to periodically clear vty lines (at least some of them).

Also manually clearing vty line should be possible to do with:
#disconnect ssh 5
or
# clear line vty <number>           <-----  Reset a terminal line

<div>
i doubt this was the issue. so you're saying all your ssh lines were taken hang up?
</div>


i doubt this was the issue. so you're saying all your ssh lines were taken hang up?

<div>
<div class="content wysiwyg-content">
Any idea why ssh will refuse connections? &nbsp;I &nbsp;ssh into the switch yesterday and today it's refused my connection. &nbsp;I checked the backup config from yesterday and today no changes were made using net++.
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</div>


Any idea why ssh will refuse connections?  I  ssh into the switch yesterday and today it's refused my connection.  I checked the backup config from yesterday and today no changes were made using net++.

SSH refused connection cisco switch

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.