I have a customer with two ASAs; in Active/Standby. They want to purchase one AIP. Will failover (without the AIP functionality) to the Standby work if the AIP is configured for Promiscuous mode? Thanks, Bob
Re: ASA failover with 1 AIP SSM in Active/Standby?
The only connection to the SSM that can be done internally through the ASA is a "session". This is an internal telnet to the SSM and can be used to access the SSM's CLI.
This is very usefull when you manage your SSM directly through the CLI.
However, most customers prefer to use a graphics based tool like IDM, ASDM, or CSM for managing the configuration of the SSM, and prefer to use a graphics based tool like IEV or CS MARS for monitoring of the alerts from the SSM.
All of these graphics based tools need network access to the SSM through a web port (https on port 443 by default). Access to this port is not allowed internally through the ASA direct to the SSM.
All web connections must be made to the External Management interface of the SSM.
If you are not using all 4 of your ASA interfaces you could choose to wire the External SSM interface directly to one of your ASA interfaces, and create a small subnet for the ASA and IPS IP Addresses. So then all external connections to the SSM would be routed into the ASA, then out of the ASA, and into the external port of the SSM.
That subnet of just the ASA and SSM could be made using a network reserved for local IPs (like a 10, or 172, or 192 network) and then use NAT/PAT for translation on the other network interfaces of the ASA.
But it does still require that wire connected to the external port of the SSM.
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