Filter ICMP Timestamp requests

[dikerc]

I need to filter ICMP Timestamp requests at our outer router. Is it as simple as adding this to our ACL? deny udp/tcp any any eq ports 13 and 14

[Harold Ritter]

No. ICMP is not udp nor tcp. You should use something like this:

access-list 101 deny icmp any any timestamp-request

Hope this helps,

[dikerc]

Thanks! That is going in the ACL today.