We know access-list 12 permit 184.108.40.206 255.255.255.0
is invalid, because the wildcard is wrong.
My problem is that the router did not give you any error message when type it in the router, instead it changed to access-list 12 permit 0.0.0.255 255.255.255.0 and added in the router. this cause a lot of problem because some of the network address is passed the filter.
Is it the bug in Cisco IOS?
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-JK9O3S-M), Version 12.3(12), RELEASE SOFTWARE (fc3)
It's not a bug in the IOS. 0.0.0.255 255.255.255.0 is a valid access list statement in which the router doesn't care about the first 3 octets. Any traffic from .255 is the only traffic that will be permitted. Though, in your case, it's a broadcast address and cannot be used. There can be many situations where someone entering a subnet mask by mistake in an ACL could translate to a valid/useful access control entry. Hence, the router always translates the ACE to the right address/wild card mask.
It's easy to make a typo or an unintentional error when configuring access list. After configuring an ACL, I always double check my work by doing a 'show access-list (#)' and verify that it's configured the way I want it to be.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.