On Thu, 2009-01-08 at 12:14 +0530, Siva Prasad wrote: > Hi, > > I am using mrtg 2.16.2, please can any one tell me does mrtg 2.16.2 > supports SNMP v3.
Yes, with a couple of caveats: 1. You need to load the net-snmp libraries (and perl bindings) for snmp v3 support 2. Although the docs for MRTG say it supports aes192 and aes256 privacy encryption, the net-snmp library doesn't currently support those options due to the way keys are transmitted, so you are limited to either des or aes128. And I think aes128 requires the use of sha1 hashes, since the problem with aes192 is that the hash of the privacy password is used as the crypto key, but a sha1 hash only provides 128 bytes of data, so they don't have enough key material. As I recall, the aes128 support requires an extra perl module - Crypt::Rijndael. I currently poll about 200 devices with snmp v3, including a fair number with aes128 -- Daniel J McDonald, CCIE #2495, CISSP #78281, CNX Austin Energy http://www.austinenergy.com
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