Here is the lists of ospf, rip, and eigrp passive interface labs and theories.

1.Route filtering passive interface OSPF. https://www.internetworks.in/2019/04/route-filtering-passive-interface-ospf.html

2.Route filtering passive interface RIPv2. https://www.internetworks.in/2018/11/route-filtering-passive-interface-ripv2.html

3.Route filtering passive interface EIGRP. https://www.internetworks.in/2019/03/eigrp-passive-interface-and.html