<div>
could you show us the config?<br />
<br />

</div>


<div>
So you want 1.1 to be able to ping 1.2 but you don't want 1.2 to be able to ping 1.1?<br />
<br />
If so:<br />
<br />

<pre><code id="code-468475">access-list 101 deny icmp host 192.168.1.2 host 192.168.1.1 eq echo request
access-list 101 permit ip any any
int e0/1
 ip access-group 101 in</code></pre>
</div>


So you want 1.1 to be able to ping 1.2 but you don't want 1.2 to be able to ping 1.1?

If so:



access-list 101 deny icmp host 192.168.1.2 host 192.168.1.1 eq echo request
access-list 101 permit ip any any
int e0/1
 ip access-group 101 in

<div>
sorry for delay reply<br />
<br />
after putting eq echo &nbsp; &nbsp;there is no option like &quot;request&quot; my router is version is &nbsp;C7200-ADVENTERPRISEK9-M), Version 12.4(15)T9,
</div>


sorry for delay reply

after putting eq echo    there is no option like "request" my router is version is  C7200-ADVENTERPRISEK9-M), Version 12.4(15)T9,

<div>
<div class="content wysiwyg-content">
HI,<br />
<br />
i want an acl that do this &quot;i can ping nd get reply from 192.168.1.2 but 192.168.1.2 cant ping me he doesnt get reply&quot; so i applied this on my e0/1 inbound &nbsp; &nbsp; e0/1 ip is 192.168.1.1 &nbsp; <br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;10 deny icmp host 192.168.1.2 host 192.168.1.1 echo-reply (9 matches<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 20 permit icmp any any echo-reply<br />
<br />
<br />
now 192.168.1.2 cant ping 192.168.1.1 it sees destiation host unreachable but its also blocking 192.168.1.1 to ping or get reply from 192.168.1.2 this what i dont want.<br />
<br />
when i apply outbound nothing works!!<br />
<br />
Thanks
</div>
</div>


HI,

i want an acl that do this "i can ping nd get reply from 192.168.1.2 but 192.168.1.2 cant ping me he doesnt get reply" so i applied this on my e0/1 inbound     e0/1 ip is 192.168.1.1   
                           10 deny icmp host 192.168.1.2 host 192.168.1.1 echo-reply (9 matches
                          20 permit icmp any any echo-reply


now 192.168.1.2 cant ping 192.168.1.1 it sees destiation host unreachable but its also blocking 192.168.1.1 to ping or get reply from 192.168.1.2 this what i dont want.

when i apply outbound nothing works!!

Thanks

how to block one way ping?

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

Networking hardware includes the physical devices facilitating the use of a computer network. Typically, networking hardware includes gateways, routers, network bridges, modems, wireless access points, networking cables, line drivers, switches, hubs, and repeaters. But it also includes hybrid network devices such as multilayer switches, protocol converters, bridge routers, proxy servers, firewalls, network address translators, multiplexers, network interface controllers, wireless network interface controllers, ISDN terminal adapters and other related hardware.