Solved: ASA Access-group

noobieee7 · ‎01-20-2010

Hi All,

For ASA, is there any standard or a need of having a in and out access-group for each inside or outside interface, or is it base on situation and requirement?

Regards,

Lawrence

Jon Marshall · ‎01-20-2010

noobieee7 wrote:

Hi All,

For ASA, is there any standard or a need of having a in and out access-group for each inside or outside interface, or is it base on situation and requirement?

Regards,

Lawrence

It is based purely on situation and requirement. Inbound access-lists are by far the most commonly used but i have had situations in the past where an outbound acl has been very useful.

Jon

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Kureli Sankar · ‎01-20-2010

Mostly people only apply acl "IN" on an interface. We have seen cases where people apply acl IN and OUT on the same interface by mistake.

In some cases there as been a requirement. Like for example you have inside, dmz and outside. You manage inside and outside interface acl but another team manages the dmz acl. They allow everything on their interface but, you want to control what leaves the outside interface so, you can apply an acl OUT on the outside interface.

So, it depeds on the requirement.

-KS

View solution in original post

Jon Marshall · ‎01-20-2010

noobieee7 wrote:

Hi All,

For ASA, is there any standard or a need of having a in and out access-group for each inside or outside interface, or is it base on situation and requirement?

Regards,

Lawrence

It is based purely on situation and requirement. Inbound access-lists are by far the most commonly used but i have had situations in the past where an outbound acl has been very useful.

Jon

Kureli Sankar · ‎01-20-2010

Mostly people only apply acl "IN" on an interface. We have seen cases where people apply acl IN and OUT on the same interface by mistake.

In some cases there as been a requirement. Like for example you have inside, dmz and outside. You manage inside and outside interface acl but another team manages the dmz acl. They allow everything on their interface but, you want to control what leaves the outside interface so, you can apply an acl OUT on the outside interface.

So, it depeds on the requirement.

-KS

vilaxmi · ‎01-20-2010

Hello,

I would agree with above replies. Just to add, I would like to mention that on an interface you can apply one ACL per direction. Also please keep in mind mMore the number of ACLs more the packet processing done at each ifc in ASA.

Thanks

Vijaya

Ganesh Hariharan · ‎01-21-2010

Hi All,

For ASA, is there any standard or a need of having a in and out access-group for each inside or outside interface, or is it base on situation and requirement?

Regards,

Lawrence

Hi Lawrence,

Genrally it depends on the situation as good practices we used to do inbound acl with traffic flow coming inside to device in in direction.

HTH

Regards

Ganesh.H