Please install systemd services for nfdump. Debian ships these: https://salsa.debian.org/debian/nfdump/-/tree/unstable/debian?ref_type=heads /etc/nfdump/default.conf /lib/systemd/system-generators/nfdump-generator /lib/systemd/system/nfdump.service /lib/systemd/system/nfdump@.service Infra plans to switch from legacy flow-tools to nfdump tooling as part of support systemd support, because upstream flow-tools is very unmaintained.