Hi again, The strange thing is that spamd is getting the sync messages from the master firewall and updating the spamd tables and log files.
But, although the dhcpd sync messages seem to go through the em0 iface, the dhcpd in the backup firewall is not displaying sync updates in the log files. I had a quick look at the dhcpd source code and understood that sync_recv should log messages of the type: note("DHCP_SYNC_LEASE from %s for hw %s -> ip %s, " "start %d, end %d", .... when it received a DHCP_SYNC_LEASE. Is that correct? Both firewalls share the same dhcpd.key file. Kind regards, Jose.