Signatures fit into 64 bytes. These signatures are actually compressed versions of longer signatures; the times for compression and decompression are included in the cycle counts reported above. • small keys Public keys consume only 32 bytes. The times for compression and decompression are again included. SSH And Switch Access Secure Shell (SSH) is a protocol that provides a secure, remote connection to a device. SSH provides more security for remote connections than Telnet does by providing strong encryption when a device is authenticated. This software release supports SSH Version 2 (SSHv2). SSH functions the same in IPv6 as in IPv4.
For IPv6, SSH supports IPv6 addresses and enables secure, encrypted connections with remote IPv6 nodes over an IPv6 transport. SNMP Trap Generation Depending on your release, Simple Network Management Protocol (SNMP) traps are generated automatically when an SSH session terminates if the traps have been enabled and SNMP debugging has been enabled. When you configure the snmp-server host command, the IP address must be the address of the PC that has the SSH (telnet) client and that has IP connectivity to the SSH server. Note You must also enable SNMP debugging using the debug snmp packet command to display the traps.
The trap information includes information such as the number of bytes sent and the protocol that was used for the SSH session. SSH Keyboard Interactive Authentication The SSH Keyboard Interactive Authentication feature, also known as Generic Message Authentication for SSH, is a method that can be used to implement different types of authentication mechanisms. Basically, any currently supported authentication method that requires only user input can be performed with this feature. The feature is automatically enabled. The following methods are supported:
• Password • SecurID and hardware tokens printing a number or a string in response to a challenge sent by the server • Pluggable Authentication Module (PAM) • S/KEY (and other One-Time-Pads) Secure Shell Version 2 Support SSH And Switch Access Secure Shell Version 2 Support 5