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03a3449e1a
To limit the time to process an event, you should set 'timeout processing' option. So 'timeout ack' option is redundant and useless.
89 lines
2.8 KiB
Plaintext
89 lines
2.8 KiB
Plaintext
A Random IP reputation service acting as a Stream Processing Offload Agent
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--------------------------------------------------------------------------
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This is a very simple service that implement a "random" ip reputation
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service. It will return random scores for all checked IP addresses. It only
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shows you how to implement a ip reputation service or such kind of services
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using the SPOE.
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Start the service
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---------------------
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After you have compiled it, to start the service, you just need to use "spoa"
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binary:
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$> ./spoa -h
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Usage: ./spoa [-h] [-d] [-p <port>] [-n <num-workers>]
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-h Print this message
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-d Enable the debug mode
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-p <port> Specify the port to listen on (default: 12345)
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-n <num-workers> Specify the number of workers (default: 5)
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Note: A worker is a thread.
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Configure a SPOE to use the service
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---------------------------------------
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All information about SPOE configuration can be found in "doc/SPOE.txt". Here is
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the configuration template to use for your SPOE:
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[ip-reputation]
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spoe-agent iprep-agent
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messages check-client-ip
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option var-prefix iprep
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timeout hello 100ms
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timeout idle 30s
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timeout processing 15ms
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use-backend iprep-backend
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spoe-message check-client-ip
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args src
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event on-client-session
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The engine is in the scope "ip-reputation". So to enable it, you must set the
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following line in a frontend/listener section:
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frontend my-front
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...
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filter spoe engine ip-reputation config /path/spoe-ip-reputation.conf
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....
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where "/path/spoe-ip-reputation.conf" is the path to your SPOE configuration
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file. The engine name is important here, it must be the same than the one used
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in the SPOE configuration file.
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IMPORTANT NOTE:
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Because we want to send a message on the "on-client-session" event, this
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SPOE must be attached to a proxy with the frontend capability. If it is
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declared in a backend section, it will have no effet.
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Because, in SPOE configuration file, we declare to use the backend
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"iprep-backend" to communicate with the service, you must define it in HAProxy
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configuration. For example:
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backend iprep-backend
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mode tcp
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timeout server 1m
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server iprep-srv 127.0.0.1:12345 check maxconn 5
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In reply to the "check-client-ip" message, this service will set the variable
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"ip_score" for the session, an integer between 0 and 100. If unchanged, the
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variable prefix is "iprep". So the full variable name will be
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"sess.iprep.ip_score".
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You can use it in ACLs to experiment the SPOE feature. For example:
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tcp-request content reject if { var(sess.iprep.ip_score) -m int lt 20 }
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With this rule, all IP address with a score lower than 20 will be rejected
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(Remember, this score is random).
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