loopback interface in ASA or FWSM

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Aug 21st, 2009
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Hi experts,

Is it possible to create loopback interfaces in FWSM or ASA firewall

The need is i want a interface command to the firewall as I am facing problem in pinging one interface IP ADDRESS from the other zones.

Thanks in advance


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Kevin Redmon Sun, 08/23/2009 - 06:21
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No - Cisco firewalls do NOT allow for a loopback address. If you are having issues with pinging a certain interface IP address, please be sure that you are pinging the interface closest to the client machine - ie NOT another interface. Unlike a router, the Cisco firewalls do NOT allow you to ping a "far-side" interface. Also, be sure that you have 'icmp permit ' for the relevant interface.

cisco24x7 Sat, 10/24/2009 - 15:16
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"Also, be sure that you have 'icmp permit ' for the relevant interface"

This is NOT true. Pix/ASA, by default, will let you ping the interface, unless explicitly dennied.


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