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High-risk GTI reputation block on its first detected connection

Hi, all,
I have the following question:
it is possible through GTI, I suppose it would be in the policy of limits of connection, that in the first package that you see with a high reputation, it be blocked?

I make the query because until now, I can not make that this policy to block any IP address with bad reputation in its first connection.

The policies that I have displayed are:

Connectiong Limiting Policies:
High Reputation
Connection Rate
11 Conn/Sec (other proven value)
1 Conn/Sec (other proven value)
10 Conn/Sec (other proven value)
High Risk
Alert & Quarantine

IPS Policies:

IP: Connection Limiting Rule Match

Threshold: 1 (other proven value)
Interval: 25 (other proven value)

Threshold: 1 (other proven value)
Interval: 1 (other proven value)

Threshold: 10 (other proven value)
Interval: 10 (other proven value)

2 Replies
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Re: High-risk GTI reputation block on its first detected connection

Hi there,


Do you have XFF enabled on the inspection policy applied to the sensor interface or subinterface?

Are the IPS alerts showing the XFF IP address or the L3 IP address?

XFF has some impact on how Connection Limiting rules work - it is explained on this link.








Re: High-risk GTI reputation block on its first detected connection

Hi, thanks for the reply, regarding your suggestion, yes if I have XFF enabled, but I think this only applies to HTTP inspection. Investigating a little more I think it is not possible for GTI to block the connections that are detected as high risk in the first detection(like port scan or port sweep). Apparently the only way is to block by SmartBlocking, the inconviente that I see with this, is that in addition to the BTP and the reputation by GTI, adds ports considered high risk, incorporating a variable that could generate false positives. I will continue investigating, but it gives me the feeling that it is not possible. I find it strange because blocking by reputation would be an efficient and inexpensive way for team resources.

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