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Simple Pix questions

Hi guys, New to pix so just two quick questions:

  1. What is the 0.0.0.0 0.0.0.0 network mean? Does this mean any network?

  1. What is the subnet mask 255.255.255.255? And how is this different than a regular /24 subnet mask in pix language?

Thank you.

Reply to
Ian McKellan
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This is default route.

This means host.

Reply to
Make

and by this it means, that the IP portion must be a host and not a subnet. fx

192.168.1.10 255.255.255.255 - means this specific host and 192.168.1.0 255.255.255.0 means the entire network i.e. 192.168.1.1-.254

HTH Martin

Reply to
Martin Bilgrav

In the context of static() statements, in PIX 6,

192.168.1.0 255.255.255.0 in reference to an -inside- IP would mean "translate 192.168.1.1-.254 but specifically block packets that appear to be from host 192.168.1.0 or host 192.168.1.255 as those are assumed to be the base and broadcast addresses of the subnet and so should not have any traffic -from- them; in the IDS functions, mark traffic that would have been translated to hosts 192.168.1.0 and 192.16.1.255 as destinations as if it was an attempt to send traffic to a broadcast address."

However, in *most* other cases, 192.168.1.0 255.255.255.0 would mean hosts 192.168.1.0 through 192.168.1.255 with no restrictions on traffic to or from 192.168.1.0 or 192.168.1.255 .

There are only few other cases in PIX 6 where the first and last addresses are assumed to be base and broadcast addresses. Interface addresses of coures. I found one situation documented last week, but it has slipped my mind again. Not explicitly documented but inferrable by various bits of documentation is that dynamically allocated addresses are assumed to be embedded in such a situation.

Reply to
Walter Roberson

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