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| Subject: | Re: Removing ping/icmp from a network |
|---|---|
| Date: | Tue, 25 Mar 2008 17:17:54 +0000 |
I have a variety of clients with data centres who all make use of icmp/ping to monitor their servers/appliances/devices (often with poorly configured snmp versions 1 and 2).
Could anybody kindly advise me of tools and strategies for minimising or removing the use of icmp/ping on a supposedly secure network?
Thanks in advance
If you have any switches with layer 3 capabilities, block all icmp traffic in ACLs. For example, from a Cisco 3750:
ip access-list extended foo permit icmp any any packet-too-big deny icmp any any permit ip any any ! interface GigabitEthernet1/0/whatever switchport access vlan 999 switchport mode access ip access-group foo in spanning-tree portfast spanning-tree bpduguard enable
Hope this helps!
Jon K. -- Jon R. Kibler Chief Technical Officer Advanced Systems Engineering Technology, Inc. Charleston, SC USA (843) 849-8214
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