On Mon, Feb 20, 2023, at 13:13, ico wrote: > Thanks for answer. I tried this filter but the source is RTS_OSPF, not > RTS_DEVICE. Also the proto is "ospf1". I use this: protocol kernel kernel4 { scan time 60; learn; ipv4 { import all; export where source ~ [RTS_OSPF, RTS_OSPF_EXT1, RTS_OSPF_EXT2]; }; }