DISCOVERs from "unkown network segment" - suppress log messages?

Christina Siegenthaler tina at ieu.uzh.ch
Fri Nov 25 14:33:51 UTC 2022


Dear all


Is there a possibility to suppress messages like this from being logged:

Nov 25 15:13:46 ieu-dhcp1 dhcpd[23577]: DHCPDISCOVER from 00:07:32:xx:xx:xx via 10.xx.xx.1: unknown network segment

?

Background is, we (unfortunately) got new network hardware (Huawei instead of Cisco), and now I get also DHCP requests from buildings and networks that do not belong to our department and that are not served by our DHCP server. This is usually not a problem since the server simply ignores those requests (though it logs them), but now there is a client in one of the other subnets which constantly sends DISCOVERS (about 200 per minute); they fill my log file and I’d like to get rid of them… 

I tried to add the MAC address of the rogue client to the config file with an „ignore booting“ statement, but the DISCOVERs still get logged.


Thanks, Tina






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