06-20-2007 03:55 AM - edited 03-05-2019 04:50 PM
Hi,
I have a LAN behind ASA 5505, interface NAT/PAT is configured.
External interface is configured for PPPoE.
Everything works fine except I cannot ping from a LAN PC external hosts. I can however ping external hosts from ASA itself. ICMP is allowed:
icmp permit any inside
icmp permit any outside
access-list outside_access_in extended permit icmp any any
Protocol inspections and fixups are default.
When I ping an external host 61.95.50.185 from the LAN host 10.2.32.68 I am getting the following in the log:
302020 61.95.50.185 10.2.32.68 Built ICMP connection for faddr 61.95.50.185/0 gaddr 202.xx.yy.zz/1 laddr 10.2.32.68/512
302020 61.95.50.185 202.xx.yy.zz Built ICMP connection for faddr 61.95.50.185/0 gaddr 202.xx.yy.zz/1 laddr 202.xx.yy.zz/1
313004 Denied ICMP type=0, from laddr 61.95.50.185 on interface outside to 202.xx.yy.zz: no matching session
313001 61.95.50.185 Denied ICMP type=0, code=0 from 61.95.50.185 on interface outside
302021 61.95.50.185 202.xx.yy.zz Teardown ICMP connection for faddr 61.95.50.185/0 gaddr 202.xx.yy.zz/1 laddr 202.xx.yy.zz/1
302021 61.95.50.185 10.2.32.68 Teardown ICMP connection for faddr 61.95.50.185/0 gaddr 202.xx.yy.zz/1 laddr 10.2.32.68/512
Where 202.xx.yy.zz is IP of external interface of ASA.
This is a very simple setup that runs on a number of othe PIXes/ASAs and pings to external IP normally work just fine. I can't understand why ping replies are getting dropped on the interface?
Any help will be highly appreciated.
Thank you.
Alex
06-20-2007 08:39 PM
just to clarify, outside_access_in is the acl that is applied to your outside interface?
can you post the full acl, as well as all nat/global/static commands.
06-20-2007 09:52 PM
10-22-2008 12:07 PM
Did you ever come up with a fix for this, I am running into to this very issue right now on an ASA5505 running 7.2(3)?
10-22-2008 12:56 PM
Alex / Kerry, you have couple of options for handling icmp outbound, either acl or icmp inspection :
access-list outside_access_in extended permit icmp any any echo-reply
access-list outside_access_in extended permit icmp any any source-quench
access-list outside_access_in extended permit icmp any any unreachable
access-list outside_access_in extended permit icmp any any time-exceeded
access-group outside_access_in in interface outside
or icmp inspection instead of acl.
policy-map global_policy
class inspection_default
inspect icmp
http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a0080094e8a.shtml
HTH
Jorge
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