I am using MWG 8.1.5 and RSA Netwitness 10.6.6 SIEM. I noticed that not all MWG events come into siem. For example I visited a web site multiple times. The site was always loged in the MWG log, but that log did not always arrive into siem. I also did a tcpdump on the siem server to see if the packet containing that info came into siem or not. Sometimes it did, sometimes it didn't (like I mentioned before MWG log always contained the information that the site was visited). I would like to know if there could be something wrong with MWG, or this problem is entirelly on the siem's side?
since you mentioned that you created a tcpdump to check the packets, I assume that you push via syslog!?
I am not aware of any issues/bugs but I have seen cases where journald/syslog was overloaded which resulted into suppressed messages errors on MWG. These cases could be resolved through specific changes in rsyslog.conf. But all this makes only sense if you use syslog and /var/log/messages contains rsyslog related error messages. So, sorry if my syslog assumption is wrong 😊
Nevertheless, I would suggest to open a SR with all details (how do you push, SIEM IP, etc.) and attach feedback file that support can check MWG config (e.g. rsyslog.conf) and log files (mwg-core.errors.log, /Var/log/messages, etc.).
Regards, Marcel Kutrieba Technical Support Engineer