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Network Performance Monitor (NPM)

Forum Regular Expression help

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Regular Expression help

stevel over 13 years ago

Hello,

i am trying to send an alert from syslog. what i want to do is alert if an ip address is seen trying to penetrate one of our cisco ASA firewalls. examle.... if xx.xx.xx.xx gets denied x number of times within a 5 minute time period send the alert.....i'm assuming i'd have to use a regular expression but i can't seem to figure out how to search for a matching ip address......any help would be appreciated....not even sure if this can done.

thanks

Steve

0 sedmo over 13 years ago

You should be able to do this without using a regular expression. On the Message tab of the syslog rule enter the ip address you want to trigger on in the Syslog Message Pattern box. This will look for the ip address in the message part of the syslog message. The configuration would look like this:
Then on the Trigger Threshold tab enter the criteria for the number of messages that need to be received before the alert is triggered.
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0 stevel over 13 years ago in reply to sedmo

the issue is i don't know what the ip will be....i want to trigger on an ip from the outside that continues to try and get in.....like a port scan....so i won't know the ip address....if xx.xx.xx.xx gets denied say 10 times in a 1 minute alert me....

thanks
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0 sedmo over 13 years ago in reply to stevel

Gotcha. I don't believe this is currently possible. This sort of event correlation ability is something a lot of us would like to see in the product.
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0 stevel over 13 years ago in reply to sedmo

I was hoping this was available in version 10.....
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0 Questionario over 13 years ago in reply to stevel

so was I... I was also hoping traps and syslogs could set the node itself into warning status (for example when a UPS is on battery).
oh well... maybe next time
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