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tbriscoe_90614's avatar
tbriscoe_90614
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Aug 11, 2017

Viprion F5 sending logs to Qradar need the slot number removed

when sending the log to qradar it comes up in the format of slot/hostname

 

<132>Aug 11 15:27:37 slot1/testf502 warning tmm[11723]: 01260026:4: No shared ciphers between SSL peers 185.181.102.18.56372:192.168.10.156.443.

 

looking to remove the slot from the log entry before sending to qradar to allow for better sorting.

 

5 Replies

  • I don't think it is possible to remove the slot from the logs. You can always sort after the log is sent to the server, imo.

     

  • Harm4432_319355's avatar
    Harm4432_319355
    Historic F5 Account

    Steps to remove "slot1/" from remote syslog.

     

    https://support.f5.com/csp/article/K13333

     

    1) tmsh modify /sys syslog remote-servers none

     

    2) tmsh edit /sys syslog all-properties

     

    3) Find the line "include none" and replace "none" with below include statement (press "i" for insert mode):

     

    include "

     

    options {

     

    keep_hostname(no);

     

    };

     

    filter f_remote_loghost {

     

    level(warn..emerg);

     

    };

     

    destination d_remote_loghost {

     

    tcp(\"IP_SERVER_1\" port(514));

     

    udp(\"IP_SERVER_2\" port(514));

     

    };

     

    log {

     

    source(s_syslog_pipe);

     

    filter(f_remote_loghost);

     

    destination(d_remote_loghost);

     

    };

     

    "

     

  • I was able to remove the "slot1/" hostname prefix in syslog messages sent to a remote server using the below configuration on TMOS 12.1.2 HF1 (it likely works elsewhere, I just haven't tested). A few notes:

    • The result of this is that logs from the Primary slot are sent from the Cluster IP Address and logs from any Secondary slots are sent from the respective slot's assigned IP address. I did not test what happens if the slot (blade) is not assigned an IP.
    • It appears that any
      sys syslog remote-servers
      configuration is ignored when the above
      sys syslog include
      configuration is in place.
    • This configuration will be synced to any HA peers.
    • I tested an upgrade from 12.1.2 HF1 to 13.0.0 HF2 and the configuration was kept intact and was fully functional post-upgrade.
    • Someday if F5 changes how they do syslog or changes the version of syslog in use this may break.

    Formatted Configuration:

    sys syslog {
        remote-servers none
        include "
        template t_no_slot_tmpl {
             These are original template values (aside from escaped quotes)
             from t_commontmpl in /etc/syslog-ng/syslog-ng.conf on slot1 and
             slot2 of a VIPRION chassis (same on vCMP guests).
            template(\"<$PRI> $STAMP slot1/$HOST $PRIORITY $MSG\\n\");
            template(\"<$PRI> $STAMP slot2/$HOST $PRIORITY $MSG\\n\");
    
             This is the modified template value to remove slot reference.
             For multi-slot hosts and guests you will lose visiblity of
             which tmos instance (slot) is producing the log message.
            template(\"<$PRI> $STAMP $HOST $PRIORITY $MSG\\n\");
            template_escape(no);
        };
    
        destination d_no_slot_loghost {
            udp(\"10.10.10.1\" port(514) template(t_no_slot_tmpl));
            udp(\"10.10.10.2\" port(514) template(t_no_slot_tmpl));
        };
    
        log {
            source(local);
            destination(d_no_slot_loghost);
        };
        "
    }
    `
    
    
    Note that if you are going to paste the text in via `edit sys syslog` you will want to remove all leading spaces/tabs. The tmsh (tm shell) formats the pasted text on the fly and expands the space in a cascase if leading spaces exist. Also, optionally you can use single quotes around the `include` text (as seen below) to eliminate the need to manually escape every double quote and backslash. The tmsh automatically does the escaping when you exit `edit sys syslog` and save the configuration (so it will look like what I pasted above). For example:
    
    
    `include '
    template t_no_slot_tmpl {
     This is the original template t_commontmpl value from /etc/syslog-ng/syslog-ng.conf
    template("<$PRI> $STAMP slot1/$HOST $PRIORITY $MSG\n");
    
     This is the modified template value to remove slot reference.
     For multi-slot hosts and guests you will lose visiblity of
     which tmos instance (slot) is producing the log message.
    template("<$PRI> $STAMP $HOST $PRIORITY $MSG\n");
    template_escape(no);
    };
    destination d_no_slot_loghost {
     For each specific network destination use the custom template
    udp("10.10.10.1" port(514) template(t_no_slot_tmpl));
    udp("10.10.10.2" port(514) template(t_no_slot_tmpl));
    };
    log {
     Using the raw local source (untested whether GUI log settings affect this)
    source(local);
     Sending the logs to the destinations listed
    destination(d_no_slot_loghost);
    };
    '
    
  • DR_A__18839's avatar
    DR_A__18839
    Historic F5 Account

    I think what you want is this:

    tmsh modify sys syslog clustered-host-slot disabled
    

    And possibly:

    tmsh modify sys syslog clustered-message-slot enabled
    

    Some example usage and output, for easy reference:

    [root@Viprion:/S1-green-P:Active:Standalone] config  tmsh list sys syslog all-properties|grep cluster
        clustered-host-slot enabled
        clustered-message-slot disabled
    
    [root@Viprion:/S1-green-P:Active:Standalone] config  tail -2 /var/log/ltm
    Jan 11 14:53:04 slot1/Viprion info audit_forwarder: audit_forwarder started.
    Jan 11 14:53:03 slot3/Viprion info audit_forwarder: audit_forwarder started.
    
    [root@Viprion:/S1-green-P:Active:Standalone] config  tmsh modify sys syslog clustered-host-slot disabled
    [root@Viprion:/S1-green-P:Active:Standalone] config  tail -2 /var/log/ltm
    Jan 11 14:53:59 Viprion info audit_forwarder: audit_forwarder started.
    Jan 11 14:54:01 Viprion info audit_forwarder: audit_forwarder started.
    
    [root@Viprion:/S1-green-P:Active:Standalone] config  tmsh modify sys syslog clustered-message-slot enabled
    [root@Viprion:/S1-green-P:Active:Standalone] config  tail -2 /var/log/ltm
    Jan 11 14:54:21 Viprion info slot1 audit_forwarder: audit_forwarder started.
    Jan 11 14:54:23 Viprion info slot3 audit_forwarder: audit_forwarder started.
    
    [root@Viprion:/S1-green-P:Active:Standalone] config  tmsh modify sys syslog clustered-host-slot enabled
    [root@Viprion:/S1-green-P:Active:Standalone] config  tail -2 /var/log/ltm
    Jan 11 14:54:37 slot1/Viprion info slot1 audit_forwarder: audit_forwarder started.
    Jan 11 14:54:39 slot3/Viprion info slot3 audit_forwarder: audit_forwarder started.
    
    [root@Viprion:/S1-green-P:Active:Standalone] config  tmsh modify sys syslog clustered-message-slot disabled
    

    I know these have existed since at least v12.

    • PhillyPDXmike_1's avatar
      PhillyPDXmike_1
      Icon for Nimbostratus rankNimbostratus

      tmsh modify sys syslog clustered-host-slot disabled successfully removed the slot from the syslog message for numerous vCMP guest clusters running 13.1.1.4 (BIGIP-13.1.1.4-0.0.4.iso).