Hi, 

you mean something like this? https://www.balabit.com/documents/syslog-ng-ose-latest-guides/en/syslog-ng-ose-guide-admin/html/example-dropping-messages.html

On Wed, Dec 7, 2016 at 12:07 AM, Jorge Pereira <jpereiran@gmail.com> wrote:
Hi folks,

Basically, in my setup, I received a jSON and the all usual (default) syslog packets in my server. But, I have a simple filter "f_blacklist_network_by_clientip" based in a jSON field. everything works well, the problem is because when my filter "f_blacklist_network_by_clientip" return OK, the junction() goes to the next statement processing the d_default_handler() destination.

My doubt is: how to stop the processing when my filter f_blacklist_network_by_clientip() returns OK?

<SNIP>
log {
    source(s_internet);

    junction {
         channel {
            filter(f_wb_access_log);
            parser(p_msg2json);
            filter(f_blacklist_network_by_clientip);
            destination(d_wb_access_log);
            flags(final);
        };

        # Default destination
        channel {
            # DOUBT: how to don't processing if the f_blacklist_network_by_clientip return OK?
            destination(d_default_handler);
        };
    };
};

filter f_wb_access_log {  program("wb_access"); };
parser p_msg2json { json-parser( marker("") prefix("j.")); };

filter f_blacklist_network_by_clientip {
    not match("^127\.0\.", value("j.clientip"));
    not match("^172\.16\.", value("j.clientip"));
    not match("^172\.26\.", value("j.clientip"));
    not match("^172\.31\.", value("j.clientip"));
    # if match, stop the processing and don't jump to "channel { destination(d_default_handler); };
};

destination d_wb_access_log {
    file("/var/log/syslog-ng/wb/${j.webapp_domain:-invalid_gw_access}_access.log"
         create_dirs(yes) template("${MSG}\n")
    );
};

destination d_default_handler {
    file("/var/log/syslog-ng/servers/${HOST}/${FACILITY:-invalid_facility}.log"
         create_dirs(yes) 
    );
};

</SNIP>

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