Here is the problem.
3845 constantly enters the quiet mode, saying that there is a login attack.
After some research i have found the following strange thing.
Something is opening an SSH connection to the router. Then, when a syslog message appears, some part of this message enters in the username field, other part enters in the password field. Router says authentication failed and after several attemtps enters the quiet-mode.
Here is an example
Sep 23 09:50:51.987: %SEC_LOGIN-5-QUIET_MODE_OFF: Quiet Mode is OFF, because block period timed out at 09:50:51 PRM Wed Sep 23 2009
Sep 23 09:50:54.263: %SEC_LOGIN-4-LOGIN_FAILED: Login failed [user: cause block per] [Source: 0.0.0.0] [localport: 0] [Reason: Login Authentication Failed] at 09:50:54 PRM Wed Sep 23 2009
as you can see a part of the syslog message is entered as a username.
I can see requests on port 22 coming from the CW server ip address.
From the other side, device troubleshooting applet from CW says that ssh connectivity failed. (telnet connectivity is successful).
Putty from the CW server is working without any problem.
Router is running cisco ios 12.4(24)T1.
Any ideas how to troubleshoot and fix this strange behaviour?