Asa 5505 Attempt To Generate Rsa Keys Failed

Since this is brand new, I highly recommend you upgrade ASDM and the firmware before you start..that way you won't have to upgrade later after you've got everything working the way you want it.

1. How To Generate Rsa Keys
2. Asa 5505 Attempt To Generate Rsa Keys Failed Error
3. Asa 5505 Attempt To Generate Rsa Keys Failed Update

I suspect your IP change is failing because you're attempting to cut off the branch you're sitting on. The easiest way to do this is to use the console cable and change it via the command line. Set the port the way you want it, then configure the management port so you can get in and change things via ASDM

Welcome back to this series where we cover CCNA Security topics using Cisco Packet Tracer in our labs. In the previous lab, we started looking at the Cisco ASA and we will continue looking at this Cisco appliance in this lab.

The lab setup from the last article is as shown below:

Aug 22, 2017  Because the ASA device has RSA keys already in place, enter no when prompted to replace them. CCNAS-ASA(config)# crypto key generate rsa modulus 1024 WARNING: You have a RSA keypair already defined named RSA-Key. Do you really want to replace them? yes/no: no ERROR: Failed to create new RSA keys named RSA-Key b. Remove the RSA Keys from the ASA SSH Connection Failed Introduction This document describes how to configure Secure Shell (SSH) on the inside and outside interfaces of the Cisco Series Security Appliance Versions 9.x and later. When you must configure and monitor€the€Cisco Adaptive€Security Appliance (ASA) remotely with the CLI, the use of either. Oct 14, 2008  Choose Configuration Properties Certificate Key Pair, click Add and use the default options presented in order to generate the same RSA keys with ASDM. Choose Configuration Properties Device Access Secure Shell in order to use ASDM to specify hosts allowed to connect with SSH and to specify the version and timeout options. Besides allowing the permitted hosts to SSH to the ASA, you need to define RSA keys for the secure connection. In the CLI: crypto key generate rsa. For these key to work, you should have a hostname/domain-name configured on the ASA as well (unless you configure a dedicated RSA keys).

In this lab, we will configure routing on the Cisco ASA, look at the Cisco Modular Policy Framework (MPF) and also configure SSH for management access to the Cisco ASA.

Two files are attached to this article:

• cisco_asa_routing_mpf_mgt_init.pkt: This Packet Tracer file is actually the “final” PKT file from the previous lab.
• cisco_asa_routing_mpf_mgt_final.pkt: This Packet Tracer file contains the lab setup with the ASA fully configured to meet the lab requirements.

The tasks for this lab are as follows:

• Configure a loopback interface on the Outside_RTR with an IP address of 8.8.8.8/32.
• Configure a default route on the ASA pointing to the Outside_RTR. Ensure that you can ping the newly configured loopback on the Outside_RTR from the Cisco ASA.
• The ‘Inside User’ should be able to initiate connections to the ‘Web Server’ and get a response. You should also ensure that ping from the ‘Inside User’ to the ‘Web Server’ is successful. Do not use an access list to accomplish this.
• Enable SSH access to the ASA from any IP address on both the inside and outside interfaces. Create a local user on the ASA to be used for authentication with the following credentials: Username – “insideuser” and Password – “userpwd”.

Battlefield 1 cd key generator. Lab Solutions

Task 1: Loopback Interface Settings

The goal of this task is just to simulate an external host, e.g. a device on the Internet.

Task 2: Default Routing

As I said in the last article, many commands that have “ip” in the Cisco IOS do not have “ip” in the Cisco ASA. The route command, used to configure static/default routes on the Cisco ASA, is an example of this.

Another thing to keep in mind with the Cisco ASA is that you must specify an interface name (e.g. inside, outside) for any route statement. This interface name specifies the interface through which the next hop IP address is reachable.

Finally, instead of specifying “0.0.0.0 0.0.0.0” like we do on the Cisco IOS, we can shorten it to “0 0” on the Cisco ASA. However, this short form is not (yet) implemented in Packet Tracer so we must specify it in its full form.

To test this configuration, we will ping the 8.8.8.8 IP address from the Cisco ASA:

Task 3: Inside to DMZ Communication

In the last lab, we said that due to the license that comes with the Cisco ASA in Packet Tracer (Base License), the 3^rd VLAN we created (dmz) will be a restricted VLAN, i.e. it will only be able to initiate a connection to only one other VLAN. In that lab, we restricted the dmz VLAN from initiating a connection to the inside VLAN. Notice the word “initiate” in that sentence? It means that even though the dmz VLAN cannot initiate traffic to the inside, the inside VLAN can actually initiate traffic to the dmz and the dmz will respond.

Since the inside interface is on a higher security interface than the dmz, traffic from the inside to the dmz will be allowed by default. We can confirm this by opening an HTTPS connection from the ‘Inside User’ to the ‘Web Server’:

Note: Even though HTTP is also enabled on the Web Server, http://172.16.10.100 doesn’t work for some reason. I assume it’s some limitation with Packet Tracer. Two services I found to work are HTTPS and SMTP.

However, the task also requires that ping traffic from the ‘Inside User’ to the ‘Web Server’ is successful, so let’s test that:

As you can see, the ping failed. The problem is that, by default, ICMP inspection is not enabled on the Cisco ASA so even though the ping from the inside is getting to the dmz, the return traffic is not permitted. There are two ways around this issue:

1. Use the Cisco Modular Policy Framework (MPF).

The task specifically said not to use an ACL so we are left with the second option. Although you can configure an ICMP policy on the ASA, an easier option is to copy the default MPF configuration from the Cisco site and edit it to include ICMP inspection. Due to the limitations of Packet Tracer, some of the commands included in the default MPF configuration are not supported so you will end up with a configuration similar to the following:

As you can see, I have enabled ICMP inspection (inspect icmp) under the “global_policy” policy map. Let’s test again:

Task 4: SSH Access

To enable SSH on the Cisco ASA, there are a couple of things we need to do:

• Generate an RSA Key Pair. There is a default RSA Key pair on the Cisco ASA called “Default-RSA-Key”.
• If you will be using local authentication, create username/password combinations.
• Configure the ASA to use local authentication for SSH connections.
• Specify what IP addresses can manage the ASA using SSH and through what interface.

We can view the default RSA key pair using the show crypto key mypubkey rsa command:

The other necessary configuration is as follows:

Let’s first test this configuration from the ‘Inside User’ by opening command prompt and typing “ssh –l insideuser 10.0.0.1”:

The SSH connection was successful. Let’s now test from the Outside_RTR:

Great! We have now successfully completed the tasks in this lab.

Summary

This brings us to the end of this Packet Tracer lab where we have configured routing, Cisco MPF and also enabled SSH on the Cisco ASA 5505.

How To Generate Rsa Keys

In the next article, we will continue with another lab on the Cisco ASA. I hope you have found this lab insightful.

Asa 5505 Attempt To Generate Rsa Keys Failed Error

References and Further Reading

Asa 5505 Attempt To Generate Rsa Keys Failed Update

• CCNA Security Certification Series- #3 Cisco Firewall Technologies- cont’d: http://resources.intenseschool.com/ccna-security-certification-series-3-cisco-firewall-technologies-contd/
• CCNA Security Certification Series – #4 Cisco Firewall Technologies – cont’d: http://resources.intenseschool.com/ccna-security-certification-series-4-cisco-firewall-technologies-contd/