access rules

[ronin2307]

Hi there,
I am very new to cisco and the ASA5510, so be patient. I am not trying to configure the whole firewall, but I am trying to learn more about it, but I am having a hard time understanding the logic of the access rules. I am using the ASDM 5.2 and looking at the rules I see there are incoming and outgoing rules. In our case we have only incoming rules for both interfaces (inside and outside), but I can't make any sense of the inside incoming rules and how they apply to traffic. Is there any place which explains in detail for dummies how incoming and outgoing rule apply to an interface with some examples?

Thank You

 

[UnaBomber]

Are you talking about access lists on the firewall?

By the way you would get a quicker response if you posted in the PIX section on this board..

http://www.netcraftsmen.net/welcher/papers/pix02.html

http://www.cisco.com/warp/public/110/23.html

UnaBomber
ccnp mcse2k

 

[KiscoKid]

Simply put, incoming traffic is traffic that enters an interface whereas outgoing traffic leaves an interface.

So when considering the Cisca ASA, you will have one inside (i.e. LAN) interface. Thus incoming traffic on this interface is traffic originating from your LAN users whereas outgoing traffic is traffic destined for your LAN users.

 

[ronin2307]

ok I can follow that much, but is there a possibility that ASDM lets you make illogical choices like:
have an INCOMING rule on the inside interface with the source of ANY and destination of inside network?
To me this particular rule would make no sense...but yet it lets me apply it

 

[ronin2307]

actually I take this back. I don't follow what you are saying because I am looking at a rule we have that is on the INSIDE interface with the source of internal network and destination of ANY and according to the diagram they show me they are calling this an INCOMING RULE, yet direction on the diagram is outgoing from the internal network....
I am SOOOOOOOOO confused