Table of Contents
- 1 In which 2 modes does Asa work?
- 2 What is purpose of the ASA assigning security levels?
- 3 What is security level in ASA?
- 4 What is default security level for inside zone in Asa?
- 5 How do I change security level in ASA?
- 6 What are the 3 types of firewalls?
- 7 How do you save ASA config?
- 8 Is firewall a Layer 3?
In which 2 modes does Asa work?
There are two modes in which you can have your firewall; routed or transparent mode. Each mode will treat the packets differently and operate in its own way.
What is purpose of the ASA assigning security levels?
The ASA uses a concept of security levels to determine whether traffic can pass between two interfaces. The higher the security level setting on an interface, the more trusted it is.
What is security level in ASA?
ASA uses a security level associated with each interface. It is a number between 0 to 100 that defines the trustworthiness of the network that the interface is connected to; the bigger the number, the more trust you have in the network.
Which command is used to apply the name outside to an interface on the ASA?
The nameif command gives the interface a name and assigns a security level. Typical names are outside, inside, or DMZ.
Is firewall a layer 2 or 3?
A firewall generally works at layer 3 and 4 of the OSI model. Layer 3 is the Network Layer where IP works and Layer 4 is the Transport Layer, where TCP and UDP function. Many firewalls today have advanced up the OSI layers and can even understand Layer 7 – the Application Layer.
What is default security level for inside zone in Asa?
As you can see the ASA recognizes INSIDE, OUTSIDE and DMZ names. It uses a default security level of 100 for INSIDE and 0 for OUTSIDE/DMZ.
How do I change security level in ASA?
Design & Configure Each logical ASA interface must have ip address, security-level and nameif configured to work. Security levels are numbered from 0 to 100. Traffic is allowed to pass from higher to lower security level interface by default. Traffic is denied from lower to higher security level by default.
What are the 3 types of firewalls?
There are three basic types of firewalls that are used by companies to protect their data & devices to keep destructive elements out of network, viz. Packet Filters, Stateful Inspection and Proxy Server Firewalls. Let us give you a brief introduction about each of these.
What is the maximum level of security that can be applied to ASA interface?
Security level 100
Security level 100: This is the highest security level on our ASA and by default this is assigned to the “inside” interface. Normally we use this for our “LAN”. Since this is the highest security level, by default it can reach all the other interfaces.
What is the most trustworthy security level that can be configured on an ASA device interface?
Security level 100: This is the highest security level on our ASA and by default this is assigned to the “inside” interface.
How do you save ASA config?
Save running config on Cisco device Use the command copy running-config startup-config (copy run start) to overwrite the current startup config file with what is currently in the running configuration file.
Is firewall a Layer 3?
Generally, firewalls are used to protect your internal/private LAN from the Internet. A firewall generally works at layer 3 and 4 of the OSI model. Layer 3 is the Network Layer where IP works and Layer 4 is the Transport Layer, where TCP and UDP function. An example of a SPI hardware firewall is a Cisco PIX firewall.