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Hello,We recently upgrade all of our Cisco routers to 12.4(20)T and are no longer able to connect via SSH2 from any of our network admin consoles. An 'ip ssh debug' results in 'Invalid modulus length'. Has anyone seen this issue before? Thank you ...
VanDyke software provided a solution:The new Cisco IOS it seems, requires that the modulus size meet certain criteria that is not specified in the SSH draft.The following has been known to resolve the issue for other customers encountering this issue...
Here is the link to the command reference:http://www.cisco.com/en/US/docs/security/pix/pix62/command/reference/df.html#wp1025497The syntax is 'dhcpd option 67 ascii filename'
It appears that you have syslog messages configured to use TCP. This causes the PIX to do synchronous logging and if the messages cannot be delivered to the syslog server no connections are allowed through the device. Change to udp or turn off sync...
