Then you'll be unable to communicate with those networks on the internet that are
within this range. Only 172.16-31.x.x is reserved for internal use, the rest of the
addresses are in use on the public internet.
Lars
-----Original Message-----
From: Stefan Funk [mailto:[EMAIL PROTECTED]]
Sent: Wed 29-Jan-03 1:44 PM
To: [EMAIL PROTECTED]
Cc:
Subject: Re: [FW-1] Subnet Mask question
Yes, but I'd like to have the IP addresses
172.0.0.0 to 172.255.255.255 "open"
Stefan
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Isn't it nicer to define the subnet as:
172.16.0.0 255.240.0.0
??
--
N.J. Reuvers
Schippers Consultancy B.V.
Oude Boteringestraat 71
P.O. Box 11.002
9700 CA Groningen
The Netherlands
Phone: +31 50 316 81 30
Fax: +31 50 589 04 87
E-mail: [EMAIL PROTECTED]
-----Original Message-----
From: Mailing list for discussion of Firewall-1
[mailto:[EMAIL PROTECTED]]On Behalf Of Stefan
Funk
Sent: woensdag 29 januari 2003 8:23
To: [EMAIL PROTECTED]
Subject: [FW-1] Subnet Mask question
Hi Guys
(NG FP2 on SUN Solaris)
I'm working on our "Anti-Spoofing" rules to protect the ethernet ports.
Now I whould like to ALLOW the IP addresses 172.0.0.0 to 172.255.255.255
to "show" up on one ethernet port.
I defined a Net-172-0-0-0 with (see below)
Network Address: 172.0.0.0
Net Mask: 255.0.0.0
This is working well, as far as I can see that....
Now the question:
Is there a problem with my definitions, to have a class B address with a
class A subnet mask?
If this is a problem, is there a other solution for my "spoofing" rule?
I don't like to define all 172.x.x.x networks by hand, this will be to
much,
beside of maintaining it all the time....
TIA
Regards Stefan
Firewall Admin
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