ICMP traffic

I have recently added the MS MN 500 WAP and now my Mcafee firewall is
warning me about ICMP traffic (which it says it designed to transmit
performance data). Is this legit traffic between my pc and the WAP, or is
this some sort of hack attempt?

Thanks.

Chip

> Mcafee firewall is warning me about ICMP traffic

> Is this legit traffic between my pc and the WAP, or is this some sort of
hack attempt?


ICMP is ECHO traffic being sent to an ip/machine or IP/network with machines
to get the machine(s) to respond to the ECHO request. This is everyday
background noise on the Internet that should be *blocked*, if the router
has a Stateful Packet Inspection firewall component, or the FW on the host
machine is a packet filtering firewall.

In other words a machine should not be allowed to reply.

Apparently, Mcafee is preventing this from happening, which is a good thing.

You can search Google for further info on ICMP attacks.

HTH

Duane

--
The protection of the machine is a process and not a given!

"Duane Arnold" <(E-Mail Removed)> threatened to throw the computer out
the window and got it to send news:9C4Ma.2013$Xm3.775@sccrnsc02

>> Mcafee firewall is warning me about ICMP traffic
>
>> Is this legit traffic between my pc and the WAP, or is this some sort
>> of
> hack attempt?
>
>
> ICMP is ECHO traffic being sent to an ip/machine or IP/network with
> machines to get the machine(s) to respond to the ECHO request. This is
> everyday background noise on the Internet that should be *blocked*,
> if the router has a Stateful Packet Inspection firewall component, or
> the FW on the host machine is a packet filtering firewall.
>
> In other words a machine should not be allowed to reply.
>
> Apparently, Mcafee is preventing this from happening, which is a good
> thing.
>
> You can search Google for further info on ICMP attacks.
>
> HTH
>

ICMP echo is not the only type of ICMP. There are other kinds of ICMP
that should not be blocked, the most important of these being
"Fragmentation needed but DF (don't fragment) bit set" (type three, code
four.) Important things like Path MTU Discovery break when that is
blocked.