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Mahiraljubouri_'s avatar
Mahiraljubouri_
Icon for Nimbostratus rankNimbostratus
Jan 03, 2017

AFM context

Hi i have a question about the AFM context, when i create a rule in the global or the virtual server context with the action accept the VIP will not be reachable, i have to change the action to accept decisively or create the same rule in the virtual server or the global context with action accept so the VIP will be reachable, i got the idea of the firewall context but i do not know the benefits of it or when to use it in a real world scenario?

 

thanks in advance

 

AFM
security

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  • nathe's avatar
    nathe
    Icon for Cirrocumulus rankCirrocumulus
    Jan 03, 2017

    What mode is the AFM configured in, ADC or Firewall mode? ADC mode has implicit rules for existing VSs but in Firewall mode you need to explictly create firewall rules. Normally i'd recommend ADC to start with and then move over to Firewall mode once all rules in place. It sounds like the Global Drop context is dropping your traffic if you have to use Accept Decisively, although i can' t be sure. You may need to enable logging for the Global context by enabling a DB key - 

    tmsh modify sys db tm fw.globaldefaultrule log value enable

    This might give you more information on why the traffic is being dropped.

    As for reasons to use context, then it helps when understanding the firewall requirements on a per application (i.e. per VS) instance. If everything was in the global context you don't have this visbility necessarily.

    Hope this helps,

    N