Synopsis # This chapter provides operational observability patterns for OpenBSD firewalls and routers: packet-filter logging via pflog(4) and pflogd(8) , flow export with pflow(4) to external collectors (NetFlow v5/v9 and, where supported by your release, IPFIX), system and service telemetry with snmpd(8) , and central log shipping with syslogd(8) configured through syslog.conf(5) . Verification relies on pfctl(8) , tcpdump(8) , and systat(1) . Use these patterns to produce actionable signals...
