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Cisco ASA 5505 ping problems

Posted on 2011-02-16
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Last Modified: 2012-05-11
Hello,

I have a Cisco ASA 5505, basic setup can browse web etc. I however from clients inside running windows XP cannot ping anything outside. For example, opening command prompt and typing ping www.google.com or ping 4.2.2.2 or ping 8.8.8.8 etc.

It cannot ping by name or IP. Is there something I need to include to allow clients internally to ping the outside world?

This ASA doesn't have a vpn etc.

Thanks
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Question by:BluJ
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Accepted Solution

by:
mikegatti earned 125 total points
ID: 34911600
There are a couple of ways to allow "return" ICMP traffic through your firewall. One is to allow them in the access-list that is used to secure your external interface:

An example:
access-list 101 permit icmp any any echo-reply
access-list 101 permit icmp any any source-quench
access-list 101 permit icmp any any unreachable  
access-list 101 permit icmp any any time-exceeded
access-group 101 in interface outside

another is to use the icmp inspection features of the firewall:

An example:
policy-map global_policy
    class inspection_default
     inspect icmp


And last but not least if you are filtering outbound traffic you need to make sure you are allowing that ICMP traffic from your internal network out.
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Author Comment

by:BluJ
ID: 34912928
Clients inside can ping each other just fine, so the access-list 101 you are permitting replies back from the outside?
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Author Closing Comment

by:BluJ
ID: 34913384
Awesome thanks
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