From: Koen Peetermans (K.Peetermans@chello.be)
Date: Thu Jun 24 2004 - 06:23:21 GMT-3
Geert,
It's safe to block this. It's not used on the internet and should not be
coming into your router as a source address.
If you look at the autosecure 12.3 feature, it is blocked as well :
http://www.cisco.com/en/US/products/sw/iosswrel/ps5187/products_feature_guid
e09186a008017d101.html
Kind regards,
Koen.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Geert Nijs
Sent: donderdag 24 juni 2004 10:53
To: ccielab@groupstudy.com
Subject: Class A network
Hi group,
I just came across an ACL on an internet router containing the line:
access-list 110 deny ip 0.0.0.0 0.255.255.255
And i was wondering, the first class A network: 0.x.x.x
Is this a valid network ? Is this network distributed to a company on the
internet ??
If so, then i can't filter it off.
If not official, i can filter it completely off to prevent hackers spoofing
these addresses.....
Regards,
Geert
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