Beginners question


Can anyone tell me the difference between access-lists, ip access groups, extended access lists etc...

Also do firewalls have different access-lists than routers (what can firewalls do better than routers)

Not looking for an essay, just a simple explanation for network beginner would be good :)

Thanks
jlymnAsked:
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Irwin SantosComputer Integration SpecialistCommented:
"Can anyone tell me the difference between access-lists, ip access groups, extended access lists etc..."
- Sometimes a simple explanation will require you to pickup on other jargon or other inherent terms.. Here is a link to Wikipedia.  What you don't understand here, click on the the lnks within this link for further explanation
http://en.wikipedia.org/wiki/Access_control_list

"Also do firewalls have different access-lists than routers (what can firewalls do better than routers)"
- Yes they do...keep in mind that FIREWALL & ROUTER are 2 completely differnet objects.  A router MAY have a built-in firewall, generally some are simply structured to block WAN IP access, others are more complex...that all depends on the router you get.  As for the firewall, generally they have more comprehensive controls that can configure a great majority of available ports, if not all.

Hope you didn't mind the small essay at Wikipedia.. but that is necessary.
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jlymnAuthor Commented:
thanks for the info, if you have any other links that would be great...

So, with a standard router you can't block traffic, or you can only block it on specified ports..? Whereas with a firewall you can filter traffic more easily and on more ports?

If you have any example of how to setup an access-list that would be great.
I guess this is different depending on type of router/version of ios you're using..?

Also , how does an access list differ from extended access list?










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Irwin SantosComputer Integration SpecialistCommented:
"So, with a standard router you can't block traffic,"
- if that is the only thing the router does and nothing else.. YES.

"or you can only block it on specified ports..?
- if there is a firewall in place.

"Whereas with a firewall you can filter traffic more easily and on more ports? "
- YES

"I guess this is different depending on type of router/version of ios you're using..?"
- YES

'Also , how does an access list differ from extended access list?" AND "If you have any example of how to setup an access-list that would be great."
http://www.sans.org/rr/whitepapers/networkdevs/231.php

There you go, all answered.
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Irwin SantosComputer Integration SpecialistCommented:
cool .thank you.
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