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Allow traceroute

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151569

IS-IT--Management
Feb 4, 2006
38
BR
Hello

I need help for configuration, permit access from network internal for network external any host, for use tool traceroute, how make this ?

Thanks.

 
I have PIX 515 ... you know ?

Thanks.
 
You could do something like this:

object-group icmp-type TRACEROUTE
icmp-object echo
icmp-object time-exceeded


access-list <ACL_name> permit icmp any <server_IP> 255.255.255.255 object-group TRACEROUTE
 
You need to add

fixup protocol icmp error

Tracert sends packets with the TTL going from 1 upwards. when the router gets a packet that it kills from the TTL being 0 it replies with a new packet. The PIX/ASA won't allow that in unless you tell it to look for packets returning but sourced from the external device.


Brent
Systems Engineer / Consultant
CCNP, CCSP
 
Thanks, Brent, I had forgotten that.

John
<lots of meaningless certifications here>
 
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