Monitor | System Status | SEP
15-23
VPN 3000 Concentrator Series User Guide
Hash Decrypted: Packets
The number of packets that this SEP processed using both hashing (authentication) and decryption
algorithms.
Drops: Packets
The number of packets intended for processing by this SEP, but dropped due to the SEP being
overloaded.
Random Requests
The number of requests to this SEP to generate random numbers. When needed (requested), the SEP
generates a 2-KB block of random numbers and caches them on the VPN Concentrator. Various
cryptographic functions require random numbers of different sizes, and they get them from the cache.
Random Replenishments
The number of times this SEP fulfilled a request to generate a block of random numbers, to replenish the
cache.
Random Bytes Available
The number of bytes currently available in the random-number cache on the VPN Concentrator.
Random Cache Empty
The number of times the VPN Concentrator received a request for random numbers and the
random-number cache was empty. Since the VPN Concentrator monitors this cache and communicates
with the SEP to replenish it, this number should be zero or very small.
DH Keys Generated
The number of times this SEP generated a new Diffie-Hellman key pair. IPSec Security Associations use
the Diffie-Hellman algorithm to generate encryption keys, for example.
DH Derived Secret Keys
The number of times this SEP has derived the Diffie-Hellman secret key. In public-key cryptography, the
VPN Concentrator receives a remote public key, and the SEP uses the local private key to generate the
secret key.
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