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Cisco PIX firewall  --  how can I get traceroute to function?

Posted on 2008-10-20
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Last Modified: 2012-05-05
I have  PIX with three interfaces.  The outside interface is connected to a cable modem, the dmz interface is connected to network 192.168.1.0 and the inside interface is connected to network 192.168.128.0.  My security policy is simple, unrestricted outbound access from both dmz and inside.  No access from outside to inside. Limited access from outside to dmz (only dns and http).  It's all working pretty good except I am unable to successfully initiate traceroute from a host on either the inside or dmz networks to a host on the Internet.  It seems I need to permit something inbound that I am not currently permitting.  Do I need to modify an ACL in some fashion?
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Question by:w6hr
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Expert Comment

by:kyleb84
ID: 22764620
ICMP needs to be enabled inbound.
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Expert Comment

by:kyleb84
ID: 22764640
Specifically ICMP Type 8 (echo-request) and 11 (time-exceeded)

Cisco guide on enabling pings:
http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_tech_note09186a0080094e8a.shtml

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Author Comment

by:w6hr
ID: 22764689
Great, that works!!  Thanks
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kyleb84 earned 2000 total points
ID: 22764717
w6hr,

Please close this question properly by choosing Yes to the "Is this what you were looking for?" and grading my answer.

Cheers.
KB.
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