Contents
Is access-list an object group?
An object-group lets you “group” objects, this could be a collection of IP addresses, networks, port numbers, etc. Instead of creating an access-list with many different statements we can refer to an object-group. This makes the access-list smaller and easier to read.
Is an access-list a valid object group command?
The access-list command offers an Object Group option for each of the variable choices.
How do I add a network object to an object group in ASA?
Choose Configuration > Firewall > Objects > Network Objects/Group. Do one of the following: Choose Add > Network Object to add a new object. Enter a name and optionally, a description.
What is object network in Asa?
An ASA network object can contain a hostname, an IP address, or a subnet address expressed in CIDR notation. Network groups are conglomerates of network objects, network groups, and IP addresses that are used in access rules, network policies, and NAT rules.
What is the benefit of a network object group as it relates to access lists?
The Object Groups feature allows us to classify users, devices, or protocols into groups and apply those groups to access control lists (ACLs). This lets us create access control policies for groups and use object groups instead of IP addresses, protocols or even port numbers which are used in conventional ACLs.
What is Access Group in Cisco ASA?
What is an Access-Group command? You use an access-group command to apply an access-list to an interface, in a particular direction (in or out). Although I always apply access-groups in an interface to avoid confusion.
What is a network object?
Network Objects are defined segments of your network that you can reuse throughout multiple responses. Use the Network Objects feature to centralize data entry so that you only need to change the network object instead of each instance of the data.
What is object Group network?
An object group can contain a single object (such as a single IP address, network, or subnet) or multiple objects (such as a combination of multiple IP addresses, networks, or subnets). A typical access control entry (ACE) allows a group of users to have access only to a specific group of servers.
What is Cisco ASA object group for access-list?
With so many devices you will have a LOT of access-list statements and it might become an administrative nightmare to read, understand and update the access-list. To make our lives a bit easier, Cisco introduced the object-group on Cisco ASA Firewalls (and also on IOS routers since IOS 12.4.20T).
How to create object group for access list?
The object-group is ready, now we will create the access-list again and we’ll use the object-group in it: I reduced the access-list from five statements to just one statement. Instead of specifying each IP address separately, I refer to the object-group.
When to see object groups being used for service object?
See this https://supportforums.cisco.com/thread/2063088 When ever i see object-groups being used for service object is goes right after permit protocol type is not required. 09-04-2013 04:02 PM 09-04-2013 04:02 PM This format worked. At least the ASA accepted the acl.
Do you need access list for Cisco ASA firewall?
Imagine you have to manage a Cisco ASA firewall that has hundreds of hosts and dozens of servers behind it, and for each of these devices we require access-list rules that permit or deny traffic.