[AGENT++] Does SNMP++ library do strict IP checking?

[Jochen Katz]

Hi,

> One of our customer trying to do SNMP queries against devices where 
> they have been asked to use the Mapagement interface / ip for 
> queries. They reported SNMP queries are failing. During testing 
> (internally) they saw that the SNMP query comes in to the management 
> IP of a device and device responses are going out of a public 
> interface on the device.

snmp++ does not do any filtering on IPs. Responses are matched to the
requests using the requestId/messageId. I first thought about a possible
engineId discovery problem, but faking the source address of all
received packets (can be done in receive_snmp_response()) showed that it
works as expected.

> They tested same with NetSNMP and it is able to do SNMP queries and
> getting replies as well (even though other IP of same device sent
> those).

Was this done on the same machine where your product is running? If not,
there might be some filter dropping the response.

Regards,
  Jochen