Inline with our IPS mode

Hey everybody,

We are considering changing our promiscuity of inline IPS, but we want to be careful not to interrupt the normal traffic when we do. We have dealt with pretty well right now, and we do not seem to get a lot of false positives that would be refused.

So I have a few questions on this topic. Firstly, is it something that I should be careful which can cause people to the top when you do? I know that some of the signatures on the IPS runs to deny without alerting, but most of the people seems to be faulty packages which should probably be this way. Is there something known to cause problems? (This is in general. I know that you guys don't know what is on our network.)

In addition, we use MARCH to monitor all this, so I would like to define a rule to send an email to a few people, whenever something is blocked. When to create this rule, the events that trigger the rule so the group 'AttacksProtected '? In addition, the warning will be the ASA when a packet is rejected, or it will really show that it came from the IPS module?

We use MARCH 4.3.5 and our IPS is currently running 6.1 - 1.

Thanks for any help! Let me know if you need more information.

You can do a number of things for a smooth transition. You can disable the inspection on SPI (software the exception parameter) and then test all network connectivity after placing the inline sensor. Then, you can set a filter event action to avoid the action to refuse all signatures/events OR you can select all signatures and change the alert action for products only. However if you are really confident you can go forward without making any of the two above, but I would'nt :)

The AIP - SSM will join the MARCH "inside" of the SAA. He knows that the event originated on a module. To receive emails, configure the SMTP domain settings / in the "Admin" tab and then set the action of the rule to the email (by default, you can add the users admin as recipient group).

Concerning

Farrukh

Tags: Cisco Security

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