(redirect                                        (errors
    (relay-ip '10.0.1.5')                            (^
    (dest-ip                                             404 './www/webpages/errors/not-found.html'
        (select source-ip                                403 './www/webpages/errors/not-allowed.html'
            (when '10.10.1.2' '10.0.20.7')               500 './www/webpages/errors/script-error.html'
            (when '10.10.1.3' '10.0.20.7')           )
            (when '10.10.1.4' '10.0.20.8')       )
            (else '10.0.20.9')
        )
    )
)