Is cisco 1841 stateful?

Unanswered Question
Dec 29th, 2008

Hi all. I understand that cisco1841 firewall function is stateful. But if my cisco 1841 comes without the firewall function enabled, would my 1841 be stateful? Thks in advance.

I have this problem too.
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Jon Marshall Mon, 12/29/2008 - 05:10

If you mean "stateful" in terms of a stateful firewall then no it wouldn't. You can use access-lists etc.. but these are not stateful in the way the firewall is.

Jon

John Blakley Mon, 12/29/2008 - 06:21

If you don't enable the firewall functionality (ip inspects), then no it's not stateful. If ip inspects are configured on the router, then it becomes stateful.

HTH,

John

donnie Mon, 12/29/2008 - 09:36

Hi Jon,

Thks for your reply. Now i understand that routers are normally not stateful compared to firewalls. I realised that if you do not specify any accesslist on your router it would allow all incoming/outgoing traffic. However if you specify the traffic to allow in your access-list it would allow only that traffic and deny the rest. This is quite different from firewall which is implicit deny all by default.

Joseph W. Doherty Mon, 12/29/2008 - 09:31

I don't know if the 1841 supports this feature, but without the firewall feature set, "Reflexive Access Lists" are stateful.

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