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-   -   Echo Request (http://www.linuxquestions.org/questions/linux-networking-3/echo-request-861333/)

jayadhanesh 02-08-2011 02:05 AM

Echo Request
 
Hi,
Why firewalls does not allow ICMP echo request packets. Why are pings not allowed to certain systems?

Thanks,
Dhanesh.

acid_kewpie 02-08-2011 02:21 AM

Well it just depends on your security policies. ICMP will imply that a system exists (although can be spoofed by honeypots etc.) Personally I don't like permitting ICMP in general. If you have no business connecting to a web service on a given machine, what right would you have to know if that machine can be pinged?


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