With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cssKeyIndex
css Key Index
1.3.6.1.4.1.9.9.339.1.1.2.1.1
The SSH Protocol Identifier for which this entry pertains to. The protocol can be rsa1, dsa or rsa. rsa - A public-key cryptosystem defined by Rivest, Shamir and Adleman. This is used with version 2 of the SSH. rsa1 - Same as rsa, but this is used with version 1 of the SSH. dsa - Digital Signature Algorithm, a public key cipher used to generate digital signatures.
Back to CISCO-SECURE-SHELL-MIB MIB page.
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