https://community.cisco.com/t5/network-security/routing-and-acl/m-p/3301464#M1005393 <P>As always: It depends ...</P> <UL> <LI>On the router sending the updates: Nothing to allow here even if an outgoing ACL is applied to an interface as traffic initiated by the router is never filtered by an ACL.</LI> <LI>On the router receiving the updates: If there is an incoming ACL applied to the interface, the routing-protocol in use has to be allowed.&nbsp;</LI> </UL> Sun, 24 Dec 2017 09:09:45 GMT Karsten Iwen 2017-12-24T09:09:45Z https://community.cisco.com/t5/network-security/routing-and-acl/m-p/3301430#M1005391 <P>if i want to apply ACL in a network where routing in occuring should i provide&nbsp;</P> <P>#access-list 100 permit eigrp any any</P> <P>#access-list 100 permit ospf any any</P> <P>#access-list 100 permit rip any any</P> Fri, 21 Feb 2020 15:01:44 GMT https://community.cisco.com/t5/network-security/routing-and-acl/m-p/3301430#M1005391 jonk34567 2020-02-21T15:01:44Z https://community.cisco.com/t5/network-security/routing-and-acl/m-p/3301464#M1005393 <P>As always: It depends ...</P> <UL> <LI>On the router sending the updates: Nothing to allow here even if an outgoing ACL is applied to an interface as traffic initiated by the router is never filtered by an ACL.</LI> <LI>On the router receiving the updates: If there is an incoming ACL applied to the interface, the routing-protocol in use has to be allowed.&nbsp;</LI> </UL> Sun, 24 Dec 2017 09:09:45 GMT https://community.cisco.com/t5/network-security/routing-and-acl/m-p/3301464#M1005393 Karsten Iwen 2017-12-24T09:09:45Z