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Alan_Johnson_30's avatar
Alan_Johnson_30
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Oct 18, 2017

Cipher Logging iRule

Hi folks,

I'm currently using an iRule to log cipher usage. It works great. However, I need to modify to include the Virtual Server name in the log entry. Here's what I've been using:

when HTTP_REQUEST {

if { [info exists logged] && $logged == 1 }{
     Do nothing. Already logged for this connection
} else {
    set host [HTTP::host]
    set useragent [HTTP::header "User-Agent"]
    set logged 1

    log local0. "[IP::client_addr] - [SSL::cipher name] - [SSL::cipher version] - [SSL::cipher bits] - [HTTP::header "User-Agent"]"

}

}

...and here's what I was going to try to get the virtual server name added:

    log local0. "[virtual name] - [IP::client_addr] - [SSL::cipher name] - [SSL::cipher version] - [SSL::cipher bits] - [HTTP::header "User-Agent"]"

Does anyone have any thoughts on whether or not that will work? If not any suggestions?

application delivery
iRules
LTM

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  • jurgenvdmark_14's avatar
    jurgenvdmark_14
    Icon for Nimbostratus rankNimbostratus
    Oct 20, 2017

    It looks fine to me,

    I have a similar rule which logs when the SSL handshake takes place:

    when CLIENTSSL_HANDSHAKE {
    log local0.info "virtual=[virtual name], src_ip=[IP::client_addr], ssl_cipher=[SSL::cipher name], ssl_protocol=[SSL::cipher version], ssl_bits=[SSL::cipher bits]"
}

    Starting in version 11. A virtual consists of the partition and the virtual-name, f.i. 

    /Common/test
    using the following command you can get the virtual name without the partition: 
    set env_vserver [getfield [virtual] "/" 3]